Rotating mechanism and foldable electronic equipment

Abstract

The invention provides a rotating mechanism and a foldable electronic device. The rotating mechanism (100) comprises a first fixing plate (11), a second fixing plate (12), a bearing base (20), a first synchronous swing arm (41) and a second synchronous swing arm (42). The first synchronous swing arm comprises a first swing arm (41a) and a second swing arm (41b), and the first swing arm is detachably connected with the second swing arm; the first swing arm comprises a first swing body (401a), a first connecting body (402a) and a first spiral body (403a) which are sequentially connected in the width direction of the rotating mechanism. The first swinging body is in sliding and rotating connection with the first fixing plate; the second swing arm comprises a second swing body (401b), a second connecting body (402b) and a second spiral body (403b); the second swing body is slidably and rotatably connected with the second fixing plate, and the first spiral body and the second spiral body are rotatably connected with the bearing base. And the first swing arm and the second swing arm are separated, so that the machining difficulty and the machining cost are reduced, and the machining efficiency is improved.

Description

Rotating mechanism and foldable electronic device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 29, 2022, with application number 202211202161.X and application name “Rotation Mechanism and Foldable Electronic Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of electronic products, and in particular to a rotating mechanism and a foldable electronic device. Background Art

[0003] With the advancement of technology, various electronic devices have become indispensable in daily life and production. Foldable electronic devices, with their large display area and portability, have become a growing trend. Current foldable electronic devices primarily rely on a rotating mechanism to achieve folding and unfolding. Conventional rotating mechanisms employ multiple gears to achieve synchronized movement during the folding process.

[0004] However, the current rotating mechanism has many components such as synchronous gears, which are difficult to process, have low processing efficiency and high cost.

[0005] Summary of the Invention

[0006] The present application provides a rotating mechanism and a foldable electronic device, which are relatively simple to manufacture and have low cost.

[0007] In a first aspect, the present application provides a rotation mechanism, comprising: a first fixed plate, a second fixed plate, a bearing base, a first synchronous swing arm, and a second synchronous swing arm.

[0008] The first fixed plate and the second fixed plate are located on opposite sides of the supporting base; the first synchronous swing arm and the second synchronous swing arm are respectively installed on opposite sides of the supporting base in the width direction, and are respectively rotatably connected to the supporting 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.

[0009] The first synchronous swing arm includes a first swing arm and a second swing arm, and the first swing arm is detachably connected to the second swing arm; the first swing arm includes a first swinging body, a first connecting body and a first spiral body connected in sequence along the width direction of the rotating mechanism; the first swinging body is slidably and rotatably connected to the first fixed plate; the first spiral body is rotatably connected to the supporting base; the second swing arm includes a second swinging body, a second connecting body and a second spiral body connected in sequence along the width direction of the rotating mechanism; the second swinging body is slidably and rotatably connected to the second fixed plate, and the second spiral body is rotatably connected to the supporting base.

[0010] In this embodiment, the first and second swing arms are detachably connected when assembled, and are separated when not assembled. Therefore, the first and second swing arms are independently machined. Compared to a one-piece swing arm, the dimensions of the first and second swing arms along the length of the rotating mechanism are reduced, thereby reducing the difficulty of machining the first and second swing arms, improving machining efficiency, and lowering costs. In particular, after the first and second swing arms are separated, they can be machined using a mold, significantly increasing machining efficiency and precision compared to conventional computer numerical control (CNC) machine tools.

[0011] In some embodiments, the rotation mechanism further includes a first mounting shaft fixedly connected to the support base. The first helical body is provided with a first through-hole and a first helical surface, wherein the axial direction of the first through-hole is parallel to the longitudinal direction of the rotation mechanism; the first helical surface spirally extends 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.

[0012] In some embodiments, the rotating mechanism further includes a synchronous slider; the synchronous slider is slidably mounted on the bearing base; the synchronous slider is provided with a first mating surface, which is a helical surface; and the first helical surface abuts against the first mating surface.

[0013] When the rotating mechanism switches from the deployed state to the folded state, the first fixed plate rotates counterclockwise, causing the first and second swing arms to slide relative to the first fixed plate and rotate counterclockwise. The first and second swing arms rotate counterclockwise relative to the support base, and the first helical surface pushes against the first mating surface, causing the synchronous slider to slide along the length of the rotating mechanism (the negative direction of the Y axis). The second fixed plate rotates clockwise, causing the second synchronous swing arm to slide and rotate relative to the second fixed plate. Under the action of the synchronous slider, the second synchronous swing arm moves synchronously with the first and second swing arms.

[0014] When the rotating mechanism switches from the folded state to the unfolded state, the first fixed plate rotates clockwise, the first and second swing arms slide and rotate clockwise relative to the first fixed plate, and the first and second swing arms rotate clockwise relative to the support base, and the synchronous slider slides along the length direction of the rotating mechanism (the positive direction of the Y axis). The second fixed plate rotates counterclockwise, the second synchronous swing arm slides and rotates relative to the second fixed plate, and rotates 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.

[0015] In the present application, the first synchronous swing arm comprises 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 synchronization function as an integrally formed swing arm. Furthermore, a first through hole provided in the first swing arm extends through the first swing arm along the Y-axis, enabling the first swing arm to be manufactured using a mold.

[0016] Specifically, when machining the first swing arm, the raw material is placed in the lower mold, which is then driven to engage the upper mold, allowing the upper and lower molds to cooperate to machine the first through-hole and the first helical surface. Because the first through-hole extends through the first swing arm along the Y-axis, the mold can be removed from the Y-axis. This makes machining easier than with integrated synchronous swing arms, which must be CNC-machined. The mold processing is more efficient, precise, and cost-effective.

[0017] 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 wall surface of the first through-hole along the Y-axis is consistent, with no localized protrusions or depressions. This allows for smooth demolding of the first through-hole after machining, thus enabling the first swing arm to be machined using a mold.

[0018] In some embodiments, the first swinging member is in the shape of a thin plate, and the first spiral is in the shape of a tube with an inclined notch (first spiral opening). The first connector is approximately S-shaped and is connected between the first swinging member and the first spiral, facilitating connection of the first swinging member to the first fixed plate and the first spiral to the supporting base. This structure of the first swing arm is simple and can be formed using a mold, reducing costs and improving processing efficiency.

[0019] In some embodiments, the first spiral body includes a first inner circumferential surface, a first outer circumferential surface, and a first end wall surface; the first inner circumferential surface serves as 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 is connected between the first inner circumferential surface and the first outer circumferential surface, and the first through hole extends through the first end wall surface; opposite sides of the first spiral surface are respectively connected to the first inner circumferential surface and the first outer circumferential surface, and one end of the first spiral 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 spiral surface can all be manufactured using a mold, reducing costs and improving processing efficiency.

[0020] In some embodiments, the synchronous slider includes a fixedly connected synchronous body and a first spiral block, and the synchronous body is slidably installed on the supporting base; the first spiral block is provided with a first through hole and a first mating surface; the first through hole penetrates the first spiral block along the length direction of the rotating mechanism, the first through hole is coaxial with the first through hole, and the first installation axis also passes through the first through hole; the first mating surface extends axially spirally around the first through hole; the first spiral block can slide along the first installation axis.

[0021] Specifically, the synchronizer body includes a first synchronizer surface and a second synchronizer surface facing each other along the Z-axis, and a first synchronizer side surface and a second synchronizer side surface facing each other along the X-axis. The first synchronizer side surface is connected between one side of the first synchronizer surface and one side of the second synchronizer surface, and the second synchronizer side surface is connected between the other side of the first synchronizer surface and the other side of the second synchronizer surface. The first synchronizer side surface and the second synchronizer side surface are both inclined arcuate surfaces. Both the first synchronizer side surface and the second synchronizer side surface are inclined relative to the central axis of the synchronizer slider along the Z-axis, and the inclination direction of the first synchronizer side surface and the second synchronizer side surface are both away from the central axis of the synchronizer slider 43 along the axial direction.

[0022] The first spiral block is formed by a protrusion along the first synchronous side surface and is cylindrical. A first through-hole extends through the first spiral block along the Y-axis, allowing the first spiral block to be processed using a mold. Specifically, the raw material is placed in the lower mold, and then the upper mold and the lower mold are driven to mate with each other to form the desired structure on the raw material, thus forming the first spiral block. After processing is completed, the raw material can be removed from the mold along the Y-axis.

[0023] In traditional structures, because the synchronous swing arm is integrally formed, the helical structure where the synchronous slider and the synchronous swing arm mate is relatively long. This long helical structure is internally spiral and cannot be machined using a mold, requiring only CNC machining. The first through-hole and first mating surface in this application can be machined using a mold, which is more cost-effective and efficient than CNC machining.

[0024] In some embodiments, the first spiral block further comprises 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, and the second mating surface extends helically around the axial direction of the first through-hole. The second swing arm comprises 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 is capable of rotating around the first mounting shaft; the second helical surface extends helically around the axial direction of the second through-hole; and the second helical surface abuts the second mating surface.

[0025] When the rotating mechanism switches from the folded state to the unfolded state, the first fixed plate rotates clockwise, causing the first and second swing arms to rotate clockwise. The second helical surface pushes against the second mating surface, causing the synchronous slider to slide along the length of the rotating mechanism (the positive direction of the Y axis). The second fixed plate rotates counterclockwise, causing the second synchronous swing arm to slide and rotate relative to the second fixed plate and the supporting base. Under the action of the synchronous slider, the second synchronous swing arm, the first swing arm, and the second swing arm move synchronously.

[0026] The second through hole provided in the second swing arm passes through the second swing arm in the Y-axis direction, making it possible to process the second swing arm using a mold. Specifically, when processing the second swing arm, the raw material is placed in the lower mold of the mold, and then the lower mold is driven to snap onto the upper mold, so that the upper mold and the lower mold cooperate to process the second through hole and the second spiral surface. Because the second through hole passes through the second swing arm in the Y-axis direction, it can be demolded from the Y-axis direction. Therefore, compared with the structure of the one-piece synchronous swing arm that must be processed by CNC, it is easier to process, and the mold processing efficiency is higher, the precision is higher, and the cost is lower.

[0027] In some embodiments, the first spiral block further includes 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 away from 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 in a direction away from the first connecting surface and is connected to the synchronous 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 in a direction away from the second connecting surface and is connected to the synchronous body. As a result, 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 processed using a mold. This reduces costs and improves processing efficiency.

[0028] In some embodiments, the curvature of the first inner wall surface in the longitudinal direction of the rotating mechanism is equal, that is, remains unchanged, thereby ensuring that the first inner wall surface, especially the portion of the first inner wall surface forming the first through hole, can be processed by a mold.

[0029] In some embodiments, the synchronizer body is provided with a first ejection groove that extends through the synchronizer body along the thickness of the rotating mechanism. A portion of the second mating surface is flush with the wall of the first ejection groove along the thickness of the rotating mechanism. Thus, when machining the second mating surface, the position of the first ejection groove can be utilized to eject the second mating surface along the Z-axis, resolving the difficulty of ejecting the second mating surface and allowing the second mating surface to be machined using a mold.

[0030] In some embodiments, the support base is provided with a first mounting slot, wherein a portion of the first swing arm, a portion of the second swing arm, a synchronous slider, and a first mounting shaft are all located within the first mounting slot, with both ends of the first mounting shaft fixedly connected to two opposing walls of the first mounting slot. This makes the rotating mechanism more compact and smaller, making the rotating mechanism thinner and lighter.

[0031] In some embodiments, the synchronous slider also includes a first connecting block, which is fixedly connected to the synchronous body and is 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, the first through hole is coaxial with the first through hole, and the first mounting shaft also passes through the first through hole; the rotating mechanism also includes a first pre-pressed part and a second pre-pressed part; the first pre-pressed part and the second pre-pressed part are both sleeved on the first mounting shaft; the first pre-pressed part is located between the first spiral body and the groove wall of the first mounting groove to provide a pre-tightening force for the fit between the first spiral surface and the first mating surface; the second pre-pressed part is located between the first spiral body and the first connecting block to provide a pre-tightening force for the fit between the second spiral surface and the second mating surface.

[0032] The first and second pre-compression members are disc springs or wave springs. When assembling the rotating mechanism, the first pre-compression member is slightly compressed to provide a preload between the first helical surface and the first mating surface. The second pre-compression member is slightly compressed to provide a preload between the second helical surface and the second mating surface.

[0033] Thus, an abutment force is ensured between the first helical surface and the first mating surface, preventing synchronization failure and increasing the reliability of the synchronization assembly. An abutment force is ensured between the second helical surface and the second mating surface, preventing synchronization failure and increasing the reliability of the synchronization assembly.

[0034] In some embodiments, the rotating mechanism also includes a first adjusting member and a second adjusting member, both of which are mounted on the first mounting shaft, the first adjusting member is located between the groove wall of the first mounting groove and the first pre-pressed member, and the second adjusting member is located between the first connecting block and the second pre-pressed member.

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

[0036] 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 pre-pressed member; when the second adjusting member moves toward the second pre-pressed member, the force applied by the second adjusting member to the second pre-pressed member increases, and the pre-tightening force provided by the second pre-pressed member increases; when the second adjusting member moves away from the second pre-pressed member, the force applied by the second adjusting member to the second pre-pressed member decreases, and the pre-tightening force provided by the second pre-pressed member decreases.

[0037] The first adjusting member is a locknut, threadedly engaged with the first mounting shaft. The first adjusting member abuts the first preload member. When the first adjusting member is rotated in the first direction, it moves toward the first preload member, increasing the compression of the first preload member. This increases the force applied by the first preload member to the first helical element of the first swing arm. This increases the preload force between the first helical surface and the first mating surface.

[0038] When the first adjusting member is rotated in a second direction, the second direction is opposite to the first direction. For example, the first direction is counterclockwise and the second direction is clockwise; or alternatively, the first direction is clockwise and the second direction is counterclockwise. In this case, the first adjusting member moves away from the first preload member, reducing the compression amplitude of the first preload member. This increases the force applied by the first preload member to the first helical element of the first swing arm. This reduces the preload force between the first helical surface and the first mating surface.

[0039] The second adjustment part is a retaining spring. When the position of the second adjustment part on the first mounting shaft needs to be adjusted, the operator manually or using a tool removes the second adjustment part from the first mounting shaft. Then, the second adjustment part is manually or using a tool to be installed on the first mounting shaft. At this time, the axial position of the second adjustment part on the first mounting shaft changes. If the second adjustment part is closer to the second pre-compression part than before, that is, the second adjustment part moves closer to the second pre-compression part than before, the second adjustment part increases the compression amplitude of the second pre-compression part. At this time, the force applied by the second pre-compression part to the second helical body of the second swing arm increases. In this way, the preload force between the second helical surface and the second mating surface is increased.

[0040] If the second adjusting member is further away from the second pre-compression member than before, that is, the second adjusting member moves away from the second pre-compression member than before, the second adjusting member reduces the compression amplitude of the second pre-compression member, and the force applied by the second pre-compression member to the second helical body of the second swing arm is reduced. As a result, the preload force between the second helical surface and the second mating surface is reduced.

[0041] The preload force is adjusted by the first adjusting member and the second adjusting member, so that the synchronization component can better play a synchronization role.

[0042] In some embodiments, the second through-hole is circular, and its diameter remains constant along the length of the rotating mechanism. That is, the curvature of the second through-hole wall along the Y-axis is consistent, with no localized protrusions or depressions. This allows for smooth demolding of the second through-hole after machining, enabling the second swing arm to be machined using the same mold.

[0043] In some embodiments, the second swinging member is thin and plate-shaped, and the second spiral is cylindrical with an inclined notch (second spiral opening). The second connector is approximately S-shaped and connected between the second swinging member and the second spiral, facilitating connection of the second swinging member to the first fixed plate and the second spiral to the supporting base. This second swing arm structure is simple and can be formed using a mold, reducing costs and improving processing efficiency.

[0044] In some embodiments, the second spiral body includes a second inner circumferential surface, a second outer circumferential surface, and a second end wall surface; the second inner circumferential surface serves as 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 is connected between the second inner circumferential surface and the second outer circumferential surface, and the second through hole extends through the second end wall surface; opposite sides of the second spiral surface are connected to the second inner circumferential surface and the second outer circumferential surface, respectively, and one end of the second spiral surface is connected to the two end walls. The second inner circumferential surface, the second circumferential surface, the second end wall surface, the second through hole, and the second spiral surface can all be manufactured using molds, reducing costs and improving processing efficiency.

[0045] In some embodiments, one of the first and second swing arms is provided with a snap-fitting slot, and the other of the first and second swing arms is provided with a snap-fitting block; the snap-fitting block snaps into the snap-fitting slot. The snap-fitting slot and snap-fitting block allow the first and second swing arms to be detachably connected, resulting in a simple structure, ease of fabrication, and low cost.

[0046] In some embodiments, a resilient clip is provided on one side of the first swing arm, which serves as the aforementioned snap-in block. An inner groove is provided on one side of the second swing arm, which serves as the aforementioned snap-in slot. The resilient clip snaps into the inner groove, thereby achieving a detachable connection between the first and second swing arms.

[0047] In some embodiments, one side of the first swing arm is provided with a first engaging groove and a first engaging block arranged alternately; one side of the second swing arm is provided with a second engaging groove and a second engaging block arranged alternately; the first engaging block engages in the second engaging groove, and the second engaging block engages in the first engaging groove. This makes the structure of the first synchronous swing arm more compact and the connection between the first and second swing arms more reliable.

[0048] In some embodiments, the first engaging block and the first engaging slot are both trapezoidal in shape, with the long base of the first engaging block aligned with the opening of the first engaging slot, and the short base of the first engaging block aligned with the bottom of the first engaging slot. The second engaging block and the second engaging slot are both trapezoidal in shape, with the long base of the second engaging block aligned with the opening of the second engaging slot, and the short base of the second engaging block aligned with the bottom of the second engaging slot. Connecting the first swing arm and the second swing arm allows the first engaging block to engage with the second engaging slot along the Z-axis, while the second engaging block engages with the first engaging slot. Because the first and second engaging slots, as well as the first and second engaging blocks, are all trapezoidal in shape, relative movement along the Z-axis is prevented. Furthermore, during movement along the X- and Y-axes, the first engaging block remains securely attached to the second engaging slot and prevents it from dislodging. Similarly, the second engaging block remains securely attached to the first engaging slot and prevents it from dislodging. In this way, the first swing arm and the second swing arm can be reliably connected, and the cost can be reduced and the processing is facilitated.

[0049] In some embodiments, the second synchronous swing arm includes a third swing arm and a fourth swing arm, and the third swing arm and the fourth swing arm are detachably connected. The third swing arm includes a third swinging body, a third connecting body, and a third spiral body connected in sequence along the width direction of the rotating mechanism; the third swinging body is slidably and rotationally connected to the second fixed plate, and the third spiral body is rotationally connected to the supporting base; the fourth swing arm includes a fourth swinging body, a fourth connecting body, and a fourth spiral body connected in sequence along the width direction of the rotating mechanism; the fourth swinging body is slidably and rotationally connected to the second fixed plate, and the fourth spiral body is rotationally connected to the supporting base.

[0050] In the assembled state, the third and fourth swing arms are detachably connected. When not assembled, the third and fourth swing arms can be disassembled into separate parts, allowing them to be independently processed. The dimensions of the third and fourth swing arms along the length of the rotating mechanism are smaller than those of an integrated swing arm, thereby reducing the processing difficulty of the third and fourth swing arms, improving processing efficiency and reducing costs. In particular, after the third and fourth swing arms are separated, they can be processed using molds, significantly improving processing efficiency and precision compared to traditional CNC machining methods.

[0051] In some embodiments, the rotating mechanism also includes a second mounting shaft, which is fixedly connected to the supporting base; the third helix is ​​provided with a third through hole and a third spiral surface, and the axial direction of the third through hole is parallel to the length direction of the rotating mechanism; the third spiral surface extends spirally around the axial direction of the third through hole; the second mounting shaft passes through the third through hole, and the third helix can rotate around the second mounting shaft.

[0052] In some embodiments, the rotating mechanism further includes a synchronous slider; the synchronous slider is slidably mounted on the bearing base; the synchronous slider is provided with a third mating surface, the third mating surface is a helical surface, and the third helical surface abuts against the third mating surface.

[0053] When the rotating mechanism switches from the deployed state to the folded state, the second fixed plate rotates clockwise, the third and fourth swing arms rotate clockwise, and the third helical surface pushes the third mating surface, causing the synchronous slider to slide along the length direction of the rotating mechanism (the negative direction of the Y axis). When the rotating mechanism switches from the folded state to the deployed state, the second fixed plate rotates counterclockwise, the third and fourth swing arms rotate counterclockwise, and the synchronous slider slides along the length direction of the rotating mechanism (the positive direction of the Y axis).

[0054] In this application, the second synchronous swing arm comprises a third swing arm and a fourth swing arm. Through the detachable connection between the third and fourth swing arms, the second synchronous swing arm performs the same synchronization function as an integrally formed swing arm. Furthermore, a third through-hole provided in the third swing arm extends through the first swing arm along the Y-axis, enabling the third swing arm to be manufactured using a mold.

[0055] Specifically, when machining the third swing arm, the raw material is placed in the lower mold, which is then driven to snap onto the upper mold, allowing the upper and lower molds to cooperate to machine the third through-hole and the third helical surface. Because the third through-hole extends through the third swing arm along the Y-axis, the mold can be ejected from the Y-axis. This makes machining easier than with integrated synchronous swing arms, which must be CNC-machined. The mold processing is more efficient, precise, and cost-effective.

[0056] In some embodiments, the third through-hole is circular, and its diameter remains constant along the length of the rotating mechanism. That is, the curvature of the third through-hole wall along the Y-axis is consistent, with no localized protrusions or depressions. This allows for smooth demolding of the third through-hole after machining, enabling the third swing arm to be machined using a mold.

[0057] In some embodiments, the third swinging member is thin and plate-shaped, and the third spiral is cylindrical with an inclined notch (third spiral opening). The third connector is approximately S-shaped and connected between the third swinging member and the third spiral, facilitating connection of the third swinging member to the second fixed plate and the third spiral to the support base. This structure of the third swing arm is simple and can be formed using a mold, reducing costs and improving processing efficiency.

[0058] In some embodiments, the third spiral comprises a third inner circumferential surface, a third outer circumferential surface, and a third end wall surface; the third inner circumferential surface serves as 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 between the third inner circumferential surface and the third outer circumferential surface, and the third through hole extends through the third end wall surface; opposite sides of the third spiral surface connect the third inner circumferential surface and the third outer circumferential surface, respectively, and one end of the third spiral surface connects 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 spiral surface can all be manufactured using a mold, reducing costs and improving processing efficiency.

[0059] In some embodiments, the synchronous slider includes a fixedly connected synchronous body and a second spiral block, and the synchronous body is slidably installed on the supporting base; the second spiral block is provided with a second through hole and a third mating surface; the second through hole penetrates the second spiral block along the length direction of the rotating mechanism, the second through hole is coaxial with the second through hole, and the second installation axis also passes through the second through hole; the third mating surface extends axially spirally around the second through hole; the second spiral block can slide along the second installation axis.

[0060] Specifically, the second spiral block is formed as a protrusion along the second synchronous side surface and is cylindrical. The second through hole extends through the second spiral block along the Y-axis, allowing the second spiral block to be processed using a mold. Specifically, the raw material is placed in the lower mold of the mold, and then the upper mold and the lower mold are driven to cooperate to machine the desired structure on the raw material, so that the raw material becomes the second spiral block. After processing is completed, it can be demolded along the Y-axis.

[0061] In traditional structures, because the synchronous swing arm is integrally formed, the helical structure where the synchronous slider and the synchronous swing arm mate is long. This long helical structure is internally spiral, making it impossible to machine using a mold and requiring only CNC machining. The second through-hole and third mating surface in this application can be machined using a mold, which is more cost-effective and efficient than CNC machining.

[0062] In some embodiments, the second helical block further comprises 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, and the fourth mating surface extends helically around the axial direction of the second through-hole. The fourth swing arm comprises a fourth through-hole and a fourth helical surface, the axial direction of the fourth through-hole being parallel to the length direction of the rotating mechanism, the fourth through-hole being coaxial with the third through-hole, the second mounting shaft also passing through the fourth through-hole, and the fourth helical body being capable of rotating around the second mounting shaft; the fourth helical surface extends helically around the axial direction of the fourth through-hole; and the third helical surface abuts the third mating surface.

[0063] When the rotating mechanism switches from the folded state to the unfolded state, the second fixed plate rotates counterclockwise, the third swing arm and the fourth swing arm rotate counterclockwise, the fourth spiral surface pushes the fourth mating surface, and the synchronous slider slides along the length direction of the rotating mechanism (positive direction of the Y axis).

[0064] The fourth through hole provided on the fourth swing arm passes through the fourth swing arm in the Y-axis direction, making it possible to process the fourth swing arm using a mold. Specifically, when processing the fourth swing arm, the raw material is placed in the lower mold of the mold, and then the lower mold is driven to snap onto the upper mold, so that the upper mold and the lower mold cooperate to process the fourth through hole and the fourth spiral surface. Because the fourth through hole passes through the fourth swing arm in the Y-axis direction, it can be demolded from the Y-axis direction. Therefore, compared with the structure that must be processed by CNC for the integrated synchronous swing arm, it is easier to process, and the mold processing efficiency is higher, the precision is higher, and the cost is lower.

[0065] In some embodiments, the second spiral block is also provided with 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 passes through the third connecting surface and the fourth connecting surface; a part of the second inner wall surface is the hole wall surface of the second through hole, and the second outer wall surface is away from 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 in a direction away from the third connecting surface and is connected to the synchronous 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 in a direction away from the fourth connecting surface and is connected to the synchronous body.

[0066] Therefore, the third connecting surface, the fourth connecting surface, the second inner wall surface, the second outer wall surface, the third matching surface, the fourth matching surface, and the second through hole can all be processed by a mold, thereby reducing costs and improving processing efficiency.

[0067] In some embodiments, the curvature of the second inner wall surface in the longitudinal direction of the rotating mechanism remains unchanged, thereby ensuring that the second inner wall surface, especially the portion of the second inner wall surface forming the second through hole, can be processed by a mold.

[0068] In some embodiments, the synchronizer body is provided with a second ejection groove that extends through the synchronizer body along the thickness of the rotating mechanism. A portion of the fourth mating surface is flush with the wall of the second ejection groove along the thickness of the rotating mechanism. Thus, when machining the fourth mating surface, the position of the second ejection groove can be utilized to eject the surface along the Z-axis, resolving the difficulty of ejecting the fourth mating surface and allowing the fourth mating surface to be machined using a mold.

[0069] 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 fourth through-hole wall along the Y-axis is consistent, with no localized protrusions or depressions. This allows for smooth demolding of the fourth through-hole after machining, enabling the fourth swing arm to be machined using a mold.

[0070] In some embodiments, the fourth spiral includes a fourth inner circumferential surface, a fourth outer circumferential surface, and a fourth end wall surface; the fourth inner circumferential surface serves as 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 between the fourth inner circumferential surface and the fourth outer circumferential surface, and the fourth through hole extends through the fourth end wall surface; opposite sides of the fourth spiral surface connect the fourth inner circumferential surface and the fourth outer circumferential surface, respectively, and one end of the fourth spiral surface connects 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 spiral surface can all be manufactured using molds, reducing costs and improving processing efficiency.

[0071] In some embodiments, the support base is provided with a first mounting slot, into which a portion of the third swing arm, a portion of the fourth swing arm, a synchronous slider, and a second mounting shaft are mounted. The ends of the second mounting shaft are fixedly connected to the two walls of the first mounting slot. This makes the rotating mechanism more compact and smaller, making it thinner and lighter.

[0072] In some embodiments, the synchronous slider also includes a second connecting block, which is fixedly connected to the synchronous body and is located on the same side of the synchronous body as the second spiral block; the second connecting block is provided with a second through hole, the second through hole is coaxial with the third through hole, and the second mounting shaft also passes through the second through hole; the rotating mechanism also includes a third pre-pressed part and a fourth pre-pressed part; the third pre-pressed part and the fourth pre-pressed part are both sleeved on the second mounting shaft; the third pre-pressed part is located between the third spiral body and the groove wall of the first mounting groove to provide a pre-tightening force for the fit between the third spiral surface and the third mating surface; the fourth pre-pressed part is located between the third spiral body and the second connecting block to provide a pre-tightening force for the fit between the fourth spiral surface and the fourth mating surface.

[0073] The third and fourth pre-compression members are disc springs or wave springs. When assembling the rotating mechanism, the third pre-compression member is slightly compressed to provide a preload between the third helical surface and the third mating surface. The fourth pre-compression member is slightly compressed to provide a preload between the fourth helical surface and the fourth mating surface.

[0074] Thus, an abutment force is ensured between the third helical surface and the third mating surface, preventing synchronization failure and increasing the reliability of the synchronization assembly. An abutment force is ensured between the fourth helical surface and the fourth mating surface, preventing synchronization failure and increasing the reliability of the synchronization assembly.

[0075] In some embodiments, the rotating mechanism also includes a third adjusting member and a fourth adjusting member, both of which are mounted on the second mounting shaft, the third adjusting member is located between the groove wall of the first mounting groove and the third pre-pressed member, and the fourth adjusting member is located between the second connecting block and the fourth pre-pressed member.

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

[0077] The axial position of the fourth adjusting part in the second mounting shaft can be adjusted so that the fourth adjusting part moves toward or away from the fourth preload part; when the fourth adjusting part moves toward the fourth preload part, the force applied by the fourth adjusting part to the fourth preload part increases, and the preload force provided by the fourth preload part increases; when the fourth adjusting part moves away from the fourth preload part, the force applied by the fourth adjusting part to the fourth preload part decreases, so that the preload force provided by the fourth preload part decreases.

[0078] The third adjustment member is a locknut, threadedly engaged with the second mounting shaft. It abuts the third preload member. When the third adjustment member is rotated in the first direction, it moves toward the third preload member, increasing the compression of the third preload member. This increases the force exerted by the third preload member on the third helical element of the third swing arm. This increases the preload force between the third helical surface and the third mating surface.

[0079] When the third adjusting member is rotated in a second direction, the second direction is opposite to the first direction. For example, the first direction is counterclockwise and the second direction is clockwise; or alternatively, the first direction is clockwise and the second direction is counterclockwise. In this case, the third adjusting member moves away from the third preload member, reducing the compression amplitude of the third preload member. This increases the force exerted by the third preload member on the third helical element of the third swing arm. This reduces the preload force between the third helical surface and the third mating surface.

[0080] The fourth adjustment member is a retaining spring. When the position of the fourth adjustment member on the second mounting shaft needs to be adjusted, the operator manually or using a tool removes the fourth adjustment member from the second mounting shaft. The fourth adjustment member is then manually or using a tool to be installed on the second mounting shaft. At this point, the axial position of the fourth adjustment member on the second mounting shaft changes. If the fourth adjustment member is closer to the fourth preload member than before, that is, the fourth adjustment member has moved closer to the fourth preload member than before, the fourth adjustment member increases the compression amplitude of the fourth preload member, and the force applied by the fourth preload member to the fourth helical body of the fourth swing arm increases. This increases the preload force between the fourth helical surface and the fourth mating surface.

[0081] If the fourth adjustment member is further away from the fourth pre-compression member than before, that is, the fourth adjustment member moves away from the fourth pre-compression member than before, the fourth adjustment member reduces the compression amplitude of the fourth pre-compression member, and the force applied by the fourth pre-compression member to the fourth helical body of the fourth swing arm is reduced. As a result, the preload force between the fourth helical surface and the fourth mating surface is reduced.

[0082] The preload force is adjusted by the third adjusting member and the fourth adjusting member, so that the synchronization component can better play a synchronization role.

[0083] 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 fourth through-hole wall along the Y-axis is consistent, with no localized protrusions or depressions. This allows for smooth demolding of the fourth through-hole after machining, enabling the fourth swing arm to be machined using a mold.

[0084] In some embodiments, the fourth swinging member is in the shape of a thin plate, and the fourth spiral is in the shape of a tube with an inclined notch (fourth spiral opening). The fourth connector is approximately S-shaped and is connected between the fourth swinging member and the fourth spiral, facilitating connection of the fourth swinging member to the first fixed plate and the fourth spiral to the supporting base. This structure of the fourth swing arm is simple and can be formed using a mold, reducing costs and improving processing efficiency.

[0085] In some embodiments, the fourth spiral body includes a fourth inner circumferential surface, a fourth outer circumferential surface, and a fourth end wall surface; the fourth inner circumferential surface serves as 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 is connected between the fourth inner circumferential surface and the fourth outer circumferential surface, and the fourth through hole extends through the fourth end wall surface; opposite sides of the fourth spiral surface are respectively connected to the fourth inner circumferential surface and the fourth outer circumferential surface, and opposite ends of the fourth spiral surface are respectively connected to the synchronizing 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 spiral surface can all be manufactured using molds, reducing costs and improving processing efficiency.

[0086] In some embodiments, one of the third and fourth swing arms is provided with a snap-fitting slot, and the other of the third and fourth swing arms is provided with a snap-fitting block that snaps into the snap-fitting slot. The snap-fitting slot and snap-fitting block allow the third and fourth swing arms to be detachably connected, resulting in a simple structure, ease of fabrication, and low cost.

[0087] In some embodiments, a resilient buckle is provided on one side of the third swing arm, which serves as the aforementioned snap-in block. An inner groove is provided on one side of the fourth swing arm, which serves as the aforementioned snap-in slot. The resilient buckle snaps into the inner groove, thereby achieving a detachable connection between the third and fourth swing arms.

[0088] In some embodiments, one side of the third swing arm is provided with a third engaging groove and a third engaging block arranged alternately, and one side of the fourth swing arm is provided with a fourth engaging groove and a fourth engaging block arranged alternately; the third engaging block engages in the fourth engaging groove, and the fourth engaging block engages in the third engaging groove. This makes the structure of the second synchronous swing arm more compact and the connection between the third and fourth swing arms more reliable.

[0089] In some embodiments, the third engaging block and the third engaging slot are both trapezoidal in shape, with the long base of the third engaging block aligned with the opening of the third engaging slot, and the short base of the third engaging block aligned with the bottom surface of the third engaging slot. The fourth engaging block and the fourth engaging slot are both trapezoidal in shape, with the long base of the fourth engaging block aligned with the opening of the fourth engaging slot, and the short base of the fourth engaging block aligned with the bottom surface of the fourth engaging slot. Connecting the third and fourth swing arms allows the third engaging block to engage with the fourth engaging slot along the Z-axis, while the fourth engaging block also engages with the third engaging slot. Because the third and fourth engaging slots, the third and fourth engaging blocks, and the third and fourth engaging blocks are all trapezoidal in shape, relative movement along the Z-axis is prevented during movement of the third and fourth swing arms. Furthermore, during movement along the X- and Y-axes, the third engaging block remains securely connected to the fourth engaging slot and prevents it from dislodging. Similarly, the fourth clamping block is reliably connected to the third clamping slot and will not fall out of the third clamping slot. Thus, the third swing arm and the fourth swing arm can be reliably connected, while reducing costs and facilitating processing.

[0090] In some embodiments, the rotation mechanism also 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 supporting 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 rotationally 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 supporting 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 to approach or move 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.

[0091] When the first and second sliding members move closer together, both ends of the first elastic member are compressed simultaneously. Compared to when only one end is compressed, the first elastic member can provide double the damping force for the first fixed plate, providing a better damping feel for the user. When the first and second sliding members move away from each other, both ends of the first elastic member are released simultaneously. Compared to when only one end is compressed and then released, this can provide double the damping force for the first fixed plate, providing a better damping feel for the user.

[0092] 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 relative to each other; the first rotating cylinder and the second rotating cylinder are both rotatably connected to the first connecting rod; the first sliding member includes a first slider and a first mating wheel that are fixedly connected, and the second sliding member includes a second slider and a second mating wheel that are fixedly connected; the first slider and the second slider are both slidably connected to the first connecting rod; the first concave cam engages the first mating wheel, and the second concave cam engages the second mating wheel; the first elastic member abuts between the first slider and the second slider.

[0093] The first concave cam includes a plurality of first recesses and a plurality of first protrusions, which are arranged alternately. The second concave cam includes a plurality of second recesses and a plurality of second protrusions, which are arranged alternately. The first mating wheel includes a plurality of first mating recesses and a plurality of first mating protrusions, which are arranged alternately. The second mating wheel includes a plurality of second mating recesses and a plurality of second mating protrusions, which are arranged alternately.

[0094] When the rotating mechanism is in the deployed 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 deployed state to the folded state, the first protrusion gradually moves out of the first mating recess, and the first mating protrusion gradually moves out of the first recess; the second protrusion gradually moves out of the second mating recess, and the second mating protrusion gradually moves out of the second recess. When the rotating mechanism is in the folded state, the first protrusion of the first concave cam abuts the end of the first mating protrusion of the first mating wheel. The second protrusion of the second concave cam abuts the end of the second mating protrusion of the second mating wheel. As each protrusion moves out of the recess, the first sliding member and the second sliding member approach each other, and at this time, the two ends of the first elastic member are synchronously compressed.

[0095] In some embodiments, the rotating mechanism also includes a first connecting shaft; the first damping swing arm also 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 slide groove and a second damping slide groove, the first damping slide groove and the second damping slide groove are arranged at intervals along the length direction of the rotating mechanism, a first guide sliding block is between the first damping slide groove and the second damping slide groove, the first guide sliding block is provided with a first guide groove, and the first guide groove is respectively connected with the first damping slide groove and the second damping slide groove; the first guide sliding 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 slide groove, and the second sliding cylinder is located in the damping slide groove; the first connecting shaft passes through the first sliding cylinder, the first guide slide groove and the second sliding cylinder, and the first connecting shaft can slide and rotate in the first guide slide groove.

[0096] When the first fixing plate rotates relative to the bearing base, the first connecting shaft slides and rotates in the first guide slot, thereby achieving the sliding and rotation of the first damping swing arm. This structure makes the rotating mechanism more compact.

[0097] In some embodiments, the rotation mechanism also includes a second connecting rod, a second damping swing arm and a second elastic member; the second connecting rod is fixedly connected to the supporting 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 rotated to connect the second connecting rod; the first sliding member is slidably connected to the second connecting rod, and the second sliding member is slidably connected to the second connecting rod; the second elastic member is sleeved on the second connecting rod and is located between the first sliding member and the second sliding member; when the second fixed plate rotates relative to the supporting 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 to move closer to or 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.

[0098] When the first and second sliding members move closer together, both ends of the second elastic member are compressed simultaneously. Compared to compressing only one end, the second elastic member can provide double the damping force for the second fixed plate, providing a better damping feel for the user. When the first and second sliding members move away from each other, both ends of the second elastic member are released simultaneously. Compared to compressing and then releasing only one end, this can provide double the damping force for the second fixed plate, providing a better damping feel for the user.

[0099] 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 relative to each other; the third rotating cylinder and the fourth rotating cylinder are both rotatably connected to the second connecting rod; the first sliding member also includes a third mating wheel, and the third mating wheel is fixedly connected to the first slider; the second sliding member also includes a fourth mating wheel, and the fourth mating wheel is fixedly connected to the second slider; the first slider and the second slider are both slidably connected to the second connecting rod; the third concave cam engages the third mating wheel, and the fourth concave cam engages the fourth mating wheel; the second elastic member abuts between the first slider and the second slider.

[0100] The third concave cam includes a plurality of third recesses and a plurality of third protrusions, which are arranged alternately. The fourth concave cam includes a plurality of fourth recesses and a plurality of fourth protrusions, which are arranged alternately. The third mating wheel includes a plurality of third mating recesses and a plurality of third mating protrusions, which are arranged alternately. The fourth mating wheel includes a plurality of fourth mating recesses and a plurality of fourth mating protrusions, which are arranged alternately.

[0101] When the rotating mechanism is in the deployed state, that is, the third protrusion is located within the third mating recess, the third mating protrusion is located within the third recess; the fourth protrusion is located within the fourth mating recess, the fourth mating protrusion is located within the fourth recess. When the rotating mechanism switches from the deployed state to the folded state, the third protrusion gradually moves out of the third mating recess, the third mating protrusion gradually moves out of the third recess; the fourth protrusion gradually moves out of the fourth mating recess, the fourth mating protrusion gradually moves out of the fourth recess. When the rotating mechanism is in the folded state, the third protrusion of the third concave cam abuts the end of the third mating protrusion of the third mating wheel. The fourth protrusion of the fourth concave cam abuts the end of the fourth mating protrusion of the fourth mating wheel. As each protrusion moves out of the recess, the first sliding member and the second sliding member approach each other, and at this time, the two ends of the first elastic member are synchronously compressed.

[0102] In some embodiments, the rotating mechanism also includes a second connecting shaft; the second damping swing arm also includes a third sliding cylinder and a fourth sliding cylinder, the third sliding cylinder and the fourth sliding cylinder are arranged at intervals along the length direction of the rotating mechanism, the second fixed plate is provided with a third damping slide groove and a fourth damping slide groove, the third damping slide groove and the fourth damping slide groove are arranged at intervals along the length direction of the rotating mechanism, a second guide sliding block is between the third damping slide groove and the fourth damping slide groove, the second guide sliding block is provided with a second guide sliding groove, and the second guide sliding groove is respectively connected to the third damping slide groove and the fourth damping slide groove; the second guide sliding block is located in the interval between the third sliding cylinder and the fourth sliding cylinder, the third sliding cylinder is located in the third damping slide groove, and the fourth sliding cylinder is located in the damping slide groove; the second connecting shaft passes through the third sliding cylinder, the second guide sliding groove and the fourth sliding cylinder, and the second connecting shaft can slide and rotate in the second guide sliding groove.

[0103] When the second fixing plate rotates relative to the bearing base, the second connecting shaft slides and rotates in the second guide slot, thereby achieving the sliding and rotation of the second damping swing arm. This structure makes the rotating mechanism more compact.

[0104] In some embodiments, the rotation mechanism further includes a third connecting rod and a third elastic member. The third connecting rod is positioned between the first and second connecting rods, and the first and second sliding members are both slidably connected to the third connecting rod. The third elastic member is sleeved on the third connecting rod, with both ends of the third elastic member abutting the first and second sliding members, respectively. When the first and second sliding members move toward or away from each other, the ends of the third elastic member are simultaneously compressed or released. The third elastic member can also provide damping force for the first and second fixed plates, thereby providing a better damping feel for the user.

[0105] In some embodiments, the rotating mechanism also 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, and 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 respectively abut the first sliding member and the second sliding member; when the first sliding member and the second sliding member approach each other or move away from each other, they also synchronously compress or release the two ends of the fourth elastic member.

[0106] In some embodiments, the rotating mechanism also includes a first main swing arm and a second main swing arm; one end of the first main swing arm slides and rotates to connect to the supporting base, and the other end of the first main swing arm is rotated to connect to the first fixed plate; one end of the second main swing arm slides and rotates to connect to the supporting base, and the other end of the second main swing arm is rotated to connect to the second fixed plate.

[0107] The second aspect of the present application provides a foldable electronic device, comprising: a first shell, a second shell, a display screen and a rotating mechanism according to any one of the first aspects of the present application, wherein the rotating mechanism is connected between the first shell and the second shell, and the display screen is installed on the first shell, the second shell and the rotating mechanism. When the rotating mechanism rotates, the first shell and the second shell rotate relative to each other, thereby driving the display screen to bend or unfold.

[0108] In summary, in the present application, the first synchronous swing arm includes two parts, a first swing arm and a second swing arm. Through the detachable connection between the first swing arm and the second swing arm, the first synchronous swing arm plays the same synchronization role as the one-piece swing arm. In the assembled state, the first swing arm and the second swing arm are detachably connected. When the first swing arm and the second swing arm are not assembled, the two are in a separated state. Therefore, the first swing arm and the second swing arm can be processed independently. The dimensions of the first swing arm and the second swing arm along the length direction of the rotating mechanism are smaller than those of the one-piece swing arm. Therefore, the processing difficulty of the first swing arm and the second swing arm is reduced, the processing efficiency is improved, and the cost is reduced. In particular, after the first swing arm and the second swing arm are separated, they can be processed using a mold. Compared with the traditional CNC processing method, the processing efficiency and processing accuracy are significantly increased.

[0109] In addition, the first through hole provided on the first swing arm passes through the first swing arm in the Y-axis direction, making it possible to process the first swing arm using a mold. Specifically, when processing the first swing arm, the raw material is placed in the lower mold of the mold, and then the lower mold is driven to snap onto the upper mold, so that the upper mold and the lower mold cooperate to process the first through hole and the first spiral surface. Because the first through hole passes through the first swing arm in the Y-axis direction, it can be demolded from the Y-axis direction. Therefore, compared with the structure that must be processed by CNC for the integrated synchronous swing arm, it is easier to process, and the mold processing efficiency is higher, the precision is higher, and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0110] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0111] FIG1 is a schematic structural diagram of a foldable electronic device in a first state provided by an embodiment of the present application.

[0112] FIG2 is a schematic structural diagram of a foldable electronic device in a second state provided by an embodiment of the present application.

[0113] FIG3 is a schematic diagram of the exploded structure of the foldable electronic device shown in FIG2 .

[0114] FIG4 is a schematic structural diagram of the rotating mechanism of the foldable electronic device shown in FIG3 .

[0115] FIG5 is a schematic diagram of the exploded structure of the rotating mechanism shown in FIG4 .

[0116] FIG. 6 is a schematic structural diagram of a fixing assembly of the rotating mechanism shown in FIG. 4 .

[0117] FIG. 7 is a schematic structural diagram of a supporting base of the rotating mechanism shown in FIG. 4 .

[0118] FIG8 is a schematic structural diagram of the swing arm assembly of the rotating mechanism shown in FIG4 .

[0119] FIG9 is a schematic structural diagram of the first main swing arm of the swing arm assembly shown in FIG8 .

[0120] FIG10 is a schematic structural diagram of the second main swing arm of the swing arm assembly shown in FIG8 .

[0121] FIG11 is a schematic structural diagram of a synchronization assembly of the rotating mechanism shown in FIG4 .

[0122] FIG12 is a schematic diagram of the split structure of the synchronization component shown in FIG11 .

[0123] FIG13 is a schematic structural diagram of the first synchronous swing arm of the synchronous assembly shown in FIG12.

[0124] FIG14 is a schematic structural diagram of the second synchronous swing arm of the synchronous assembly shown in FIG12.

[0125] FIG. 15 is a schematic structural diagram of a synchronization slider of the synchronization assembly shown in FIG. 12 .

[0126] FIG16 is a schematic structural diagram of the damping assembly of the rotating mechanism shown in FIG4 .

[0127] FIG17 is a schematic diagram of the split structure of the damping assembly shown in FIG16 .

[0128] FIG18 is a schematic structural diagram of the first damping swing arm of the damping assembly shown in FIG17 .

[0129] FIG19 is a schematic structural diagram of the second damping swing arm of the damping assembly shown in FIG17 .

[0130] FIG20 is a schematic structural diagram of the first sliding member of the damping assembly shown in FIG17.

[0131] FIG21 is a schematic structural diagram of the second sliding member of the damping assembly shown in FIG17.

[0132] FIG. 22 is a schematic structural diagram of the rotating mechanism shown in FIG. 4 switching from an unfolded state to a folded state.

[0133] FIG23 is a partial cross-sectional view of the rotating mechanism shown in FIG22.

[0134] FIG24 is a schematic structural diagram of the rotating mechanism shown in FIG4 in a folded state.

[0135] FIG25 is a partial cross-sectional view of the rotating mechanism shown in FIG23. DETAILED DESCRIPTION

[0136] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0137] The rotation mechanisms used in existing foldable electronic devices include a large number of components such as synchronous gears, resulting in a complex structure and considerable assembly difficulty. Furthermore, the weight and volume of the rotation mechanisms significantly impact the slimming and lightening design of the electronic devices. The rotation mechanisms and foldable electronic devices provided in the embodiments of the present application have fewer synchronous gears and a simpler structure, which reduces assembly difficulty, reduces the weight and volume of the rotation mechanisms, and facilitates the slimming and lightening design of the electronic devices.

[0138] Please refer to Figures 1 and 2. Figure 1 is a structural schematic diagram of the foldable electronic device 1000 provided in an embodiment of the present application in a first state, and Figure 2 is a structural schematic diagram of the foldable electronic device 1000 provided in an embodiment of the present application in a second state.

[0139] The foldable electronic device 1000 shown in FIG1 is in a folded state, and the foldable electronic device 1000 shown in FIG2 is in an unfolded state. The unfolding angle of the foldable electronic device 1000 shown in FIG2 is 180 degrees. The foldable electronic device 1000 includes, but is not limited to, a cell phone, a notebook computer, a tablet personal computer, a personal digital assistant, a wearable device, or a mobile device. In the embodiments of the present application, the foldable electronic device 1000 is described as a cell phone.

[0140] It should be noted that the angles illustrated in the embodiments of this application are all allowed to have slight deviations. For example, the unfolding angle of the foldable electronic device 1000 shown in Figure 2 is 180 degrees, which means that it can be 180 degrees or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees. The angles illustrated in the examples below should be understood in the same way.

[0141] 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 direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other.

[0142] Please refer to FIG3 , which is a schematic diagram of the exploded structure of the foldable electronic device shown in FIG2 .

[0143] The foldable electronic device 1000 includes a main body 200 and a display screen 300, which is mounted on the main body 200. The display screen 300 includes a display surface and a mounting surface, which are arranged opposite to each other. The display surface is used to display text, images, videos, etc. The display screen 300 includes a first display part 310, a second display part 320, and a third display part 330. The third display part 330 is located between the first display part 310 and the second display part 320. The third display part 330 is flexible and can be bent along the X-axis. In this embodiment, the display screen 300 adopts a flexible display screen. The first display part 310 and the second display part 320 can actually be bent when they are not fixed.

[0144] In this embodiment, the display screen 300 uses a flexible display screen, for example, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (MLED) display screen, a micro organic light-emitting diode (MLED) display screen, a micro organic light-emitting diode (MLED) display screen, or a quantum dot light-emitting diode (QLED) display screen.

[0145] The main body 200 includes a first shell 210, a second shell 220, and a rotation mechanism 100. The first shell 210 is provided with a first receiving groove (not shown), and the second shell 220 is provided with a second receiving groove (not shown). The first receiving groove and the second receiving groove are connected to form a receiving groove. The rotation mechanism 100 is installed in the receiving groove and is fixedly connected to the first shell 210 and the second shell 220 to achieve a rotational connection between the first shell 210 and the second shell 220. The first shell 210 and the second shell 220 can rotate relative to each other via the rotation mechanism 100, allowing the main body 200 to switch between a folded state and an unfolded state.

[0146] The side of the first shell 210 and the second shell 220 facing away from the display screen 300 is the outer surface of the electronic device, and the side supporting the display screen 300 is the inner side. In fact, a supporting part is provided on the inner side of the first shell 210 and the second shell 220, and the display screen is mounted on the supporting part and supports the flexible display screen 300.

[0147] The display screen 300 is mounted on the main body 200, with the mounting surface fixedly connected to the main body 200. Specifically, the first housing 210 supports the first display portion 310, and the second housing 220 supports 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 rotation mechanism 100 is positioned opposite the third display portion 330 to achieve bending of the display screen 300.

[0148] The relative rotation of the first shell 210 and the second shell 220 causes the main body 200 to be in a folded state, which means that the first shell 210 and the second shell 220 rotate via the rotation mechanism 100 and approach each other, with the surfaces of the first shell 210 and the second shell 220 supporting the display screen 300 facing each other. During use, when the main body 200 is in a fully folded state, after the display screen 300 mounted on the first shell 210 and the second shell 220 are folded, the display surface of the display screen 300 located in the first display portion 310 and the display surface located in the second display portion 320 partially or completely contact each other. The relative rotation of the first shell 210 and the second shell 220 causes the main body 200 to be in an unfolded state (the first shell 210 and the second shell 220 can be maintained at any angle, such as a 90-degree angle or a 120-degree angle between the first shell 210 and the second shell 220, i.e., the display screen 300 is in a semi-expanded state). The first shell 210 and the second shell 220 rotate via the rotating mechanism 100 and move away from each other. The angle between the first shell 210 and the second shell 220 increases until the first shell 210 and the second shell 220 rotate relative to each other, causing the main body 200 to flatten and enter the unfolded state. The angle between the first shell 210 and the second shell 220 can be close to or equal to 180 degrees. The first shell 210 and the second shell 220 are generally flat. At the same time, the first shell 210 and the second shell 220 move away from each other, causing the display screen 300 to unfold until the foldable electronic device 1000 is in the unfolded state. The first shell 210 and the second shell 220 move away from each other, causing the display screen 300 to unfold further until the foldable electronic device 1000 is in the unfolded state.

[0149] The first shell 210, the second shell 220 and the rotating mechanism 100 are arranged in sequence along the X-axis direction, and the sum of the dimensions between the three is the dimension of the main body 200 in the X-axis direction (including assembly tolerance and assembly gaps between the three). 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 along the X-axis direction, and the same here includes the allowable tolerance range. The first shell 210, the second shell 220 and the rotating mechanism 100 have the same dimensions along the Y-axis direction, and the same dimensions can allow for assembly or production tolerances. The dimensions of the first shell 210, the second shell 220 and the rotating mechanism 100 along the Y-axis direction are the dimensions of the main body 200 in the Y-axis direction, and the dimensions of the main body 200 in the Y-axis direction are the same as the dimensions of the display screen 300 and the foldable electronic device 1000 along the Y-axis direction. Of course, the same here can also allow for a small amount of deviation (assembly and production tolerances).

[0150] Referring to Figures 2 and 3 , the first housing 210 and the second housing 220 rotate relative to each other via the rotation mechanism 100. When the foldable electronic device 1000 is in the unfolded state, the display screen 300 has a large display area, enabling large-screen display and operation functions of the foldable electronic device 1000, improving the user experience. Referring to 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, significantly reducing the probability of damage to the display screen 300. Furthermore, the overall size is reduced, making it easier to carry.

[0151] It should be noted that the directional terms such as "top", "bottom", "left", "right", "front" and "back" used in the embodiment of the present application to describe the foldable electronic device 1000 are mainly explained based on the display orientation of the foldable electronic device 1000 in Figures 2 and 4, with the direction facing the positive direction of the Z axis as "top" and "up", the direction facing the negative direction of the Z axis as "bottom" and "back", the direction facing the positive direction of the X axis as "right", the direction facing the negative direction of the X axis as "left", the direction facing the positive direction of the Y axis as "back", and the direction facing the negative direction of the Y axis as "front". It does not constitute a limitation on the orientation of the foldable electronic device 1000 in actual application scenarios.

[0152] 4 and 5 , FIG4 is a schematic diagram of the structure of the rotating mechanism of the foldable electronic device shown in FIG3 , and FIG5 is a schematic diagram of the exploded structure of the rotating mechanism shown in FIG4 .

[0153] The rotation mechanism 100 includes a fixed assembly 10, a supporting base 20, a swing arm assembly 30, a synchronization assembly 40, and a damping assembly 50. The swing arm assembly 30, synchronization assembly 40, and damping assembly 50 are spaced apart along the Y-axis. One side of the swing arm assembly 30 is slidably and rotationally connected to the supporting base 20, while the other side of the swing arm assembly 30 is rotationally connected to the fixed assembly 10. One side of the synchronization assembly 40 is rotationally connected to the supporting base 20, while the other side of the synchronization assembly 40 is slidably and rotationally connected to the fixed assembly 10. One side of the damping assembly 50 is rotationally connected to the supporting base 20, while the other side of the damping assembly 50 is slidably and rotationally connected to the fixed assembly 10.

[0154] The fixing assembly 10 is connected to the first housing 210 and the second housing 220. When the fixing assembly 10 rotates relative to the support base 20, it drives the swing arm assembly 30 to slide and rotate relative to the support base 20, and drives the synchronization assembly 40 and the damping assembly 50 to rotate relative to the support base 20, thereby rotating the rotation mechanism 100 and achieving curvature of the display screen 300. The synchronization assembly 40 synchronizes the rotation of the fixing assembly 10, thereby achieving synchronous operation of the first housing 210 and the second housing 220. The damping assembly 50 provides a damping force during the rotation of the rotation mechanism 100.

[0155] It should be noted that Figures 4 and 5 only show part of the structure of the rotating mechanism 100 along the positive direction of the Y-axis. The fixed component 10, the swing arm component 30, the synchronous component 40 and the damping component 50 are 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 the front and rear sides of the supporting base 20. In other embodiments, an additional group of substructures is provided between the two groups of substructures, and the additional substructure is located in the middle of the supporting base 20, thereby enhancing the stability of the rotating mechanism 100. In other embodiments, one, four or five groups of the above-mentioned substructures can also be provided. The number of the substructures can be adjusted according to actual conditions. In one embodiment, the fixed components 10 of the two groups of the above-mentioned substructures can be integrally formed, that is, the synchronous components 40, the damping components 50 and the swing arm components 30 of the two groups of substructures are all connected to the same fixed component 10.

[0156] In one set of the above substructures, the fixing assembly 10 is installed within the 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 fixedly connected to the cavity wall of the first receiving groove. The second fixing plate 12 is located within the second receiving groove and fixedly connected to the cavity wall of the second receiving groove.

[0157] 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.

[0158] The synchronization assembly 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.

[0159] 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, while 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, while the other sides of the third and fourth swing arms 42a, 42b are rotatably connected to the second fixed plate 12. The synchronous slider 43 is mounted on the support base 20. One side of the synchronous slider 43 is rotatably connected to the first and second swing arms 41a, 41b, while the other side of the synchronous slider 43 is rotatably connected to the third and fourth swing arms 42a, 42b.

[0160] The damping assembly 50 includes a first damping swing arm 51, a second damping swing arm 52, a first slider 53, a second slider 54, and an elastic assembly 55. One side of the first damping swing arm 51 is rotationally connected to the support base 20, while the other side of the first damping swing arm 51 is rotationally and slidably connected to the first fixed plate 11. One side of the second damping swing arm 52 is rotationally connected to the support base 20, while the other side of the second damping swing arm 52 is rotationally and slidably connected to the second fixed plate 12. The first slider 53, the second slider 54, and the elastic assembly 55 are mounted on the support base 20.

[0161] During the rotation of the foldable electronic device, the damping assembly 50 provides a damping force, giving users a better damping feel and enabling the foldable electronic device to hover at a preset angle, thereby enhancing the user experience. The "preset angle" here 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 degrees.

[0162] In this embodiment, when the first fixing plate 11 rotates relative to the support base 20, the first main swing arm 31 rotates relative to the first fixing plate 11, and the first main swing arm 31 slides and rotates relative to the support base 20. The first swing arm 41a and the second swing arm 41b slide and rotate relative to the first fixing plate 11, and the first swing arm 41a and the second swing arm 41b rotate relative to the support base 20. The first damping swing arm 51 slides and rotates relative to the first fixing plate 11, and the first damping swing arm 51 rotates relative to the support base 20; the second damping swing arm 52 slides and rotates relative to the second fixing plate 12, and the second damping swing arm 52 rotates relative to the support base 20. The first damping swing arm 51 and the second damping swing arm 52 cause the first slider 53 and the second slider 54 to move toward or away from each other along the Y-axis. When the first slider 53 and the second slider 54 move toward each other, the 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 away from each other, the 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 a damping force for the first fixed plate 11. When the second fixed plate 12 rotates relative to the support base 20, the second main swing arm 32 rotates relative to the second fixed plate 12, and the second main swing arm 32 slides and rotates relative to the support base 20. The third swing arm 42a and the fourth swing arm 42b slide and rotate relative to the second fixed plate 12, and the third swing arm 42a and the fourth swing arm 42b rotate relative to the support base 20. The first slider 53 and the second slider 54 move along the Y-axis to move toward or away from each other. When the first slider 53 and the second slider 54 move toward each other, the ends of the elastic component 55 are synchronously compressed by the first slider 53 and the second slider 54. When the first slider 53 and the second slider 54 move away from each other, the ends of the elastic component 55 are synchronously released by the first slider 53 and the second slider 54, so that the elastic component 55 provides a damping force for the second fixed plate 12. The damping force allows the user to experience a better hand feel, thereby improving the user experience. The synchronous slider 43 ensures the synchronization of the first synchronous swing arm 41 and the second synchronous swing arm 42, thereby achieving synchronous rotation of the first fixed plate 11 and the second fixed plate 12, and thus achieving synchronous rotation of the first shell and the second shell.

[0163] Please refer to FIG. 6 , which is a schematic structural diagram of the fixing assembly 10 of the rotating mechanism 100 shown in FIG. 4 .

[0164] 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 disposed opposite each other along the Z-axis, the first side surface 11c and the second side surface 11d are disposed opposite each other along the X-axis, and the first end surface 11f and the second end surface 11g are disposed 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 end to end in sequence, with the first side surface 11c, the second side surface 11d, the first end surface 11f, and the second end surface 11g all connected between the first top surface 11a and the first bottom surface 11b.

[0165] The first fixed plate 11 is provided with a first rotation groove 111, a first synchronous groove 112, a first damping groove 113, a second damping groove 114, and a first avoidance groove 117. The first rotation groove 111, the first synchronous groove 112, the first damping groove 113, and the second damping groove 114 are spaced apart along the Y-axis. The first avoidance groove 117 is located on one side of the first damping groove 113 and the second damping groove 114 along the X-axis.

[0166] The first rotation groove 111 passes through the first top surface 11a, the first bottom surface 11b, and the first side surface 11c. That is, the first rotation groove 111 passes through the first fixed plate 11 along the Z-axis direction. The two groove side surfaces of the first rotation groove 111 are respectively provided with a first fixing hole 118 and a second fixing hole. The axial directions of the first fixing hole 118 and the second fixing hole are both parallel to the Y-axis direction, and the first fixing hole 118 and the second fixing hole are coaxial. The first fixing hole 118 passes through the first end surface 11f to facilitate the installation of the shaft connecting the first main swing arm 31. The first rotation 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.

[0167] The first synchronous slot 112 passes through the first side surface 11c and the second side surface 11d, that is, the first synchronous slot 112 passes through the first fixing plate 11 along the X-axis direction. The first synchronous slot 112 is used to install the first swing arm 41a and the second swing arm 41b.

[0168] The first damping groove 113 is formed by the first top surface 11a being recessed toward the first bottom surface 11b, and at least partially extends through the first bottom surface 11b. The second damping groove 114 is formed by the first top surface 11a being recessed toward the first bottom surface 11b, and at least partially extends through the first bottom surface 11b. The gap between the first damping groove 113 and the second damping groove 114 forms a first guide slide 115. The first guide slide 115 is provided with a first guide groove 116 extending along the Y-axis. The first guide groove 116 extends parallel to the X-axis. The first guide groove 116 communicates with the first damping groove 113 and the second damping groove 114. The first avoidance groove 117 extends through the first top surface 11a, the first bottom surface 11b, and the first side surface 11c. The first avoidance 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 avoidance 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 at least partially extends into the first avoidance groove 117, allowing the first guide groove 116 and the first avoidance groove 117 to communicate along the Y-axis. The first damping groove 113 and the first avoidance groove 117 are sequentially distributed and connected along the X-axis, while the second damping groove 114 and the first avoidance groove 117 are sequentially distributed and connected along the X-axis. 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 avoidance groove 117 facilitates the connection of the first damping swing arm 51 .

[0169] 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, with its length parallel to the Y-axis. 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 disposed opposite each other along the Z-axis, the third side surface 12c and the fourth side surface 12d are disposed opposite each other along the X-axis, and the third end surface 12f and the fourth end surface 12g are disposed opposite each other along the Y-axis. The third side surface 12c, the fourth side surface 12d, the third end surface 12f, and the fourth end surface 12g are connected end to end in sequence, and the third side surface 12c, the fourth side surface 12d, the third end surface 12f, and the fourth end surface 12g are all connected between the second top surface 12a and the second bottom surface 12b.

[0170] The second fixing plate 12 defines a second rotation slot 121 , a second synchronous slot 122 , a third damping slot 123 , a fourth damping slot 124 and a second avoidance slot 127 .

[0171] The second rotating groove 121, the second synchronous groove 122, the third damping groove 123 and the fourth damping groove 124 are spaced apart along the Y-axis direction. The second rotating groove 121 passes through the second top surface 12a, the second bottom surface 12b and the third side surface 12c, that is, the second rotating groove 121 passes through the second fixed plate 12 along the Z-axis direction. The two groove 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 passes through the third end surface 12f to facilitate the installation of the shaft connecting 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.

[0172] The second synchronous slot 122 passes through the third side surface 12c and the fourth side surface 12d, that is, the second synchronous slot 122 passes through the second fixing plate 12 along the X-axis direction. The second synchronous slot 122 is used to install the third swing arm 42a and the fourth swing arm 42b.

[0173] The third damping groove 123 is formed by the second top surface 12a being recessed toward the second bottom surface 12b, and at least partially extends through the second bottom surface 12b. The fourth damping groove 124 is formed by the second top surface 12a being recessed toward the second bottom surface 12b, and at least partially extends through the second bottom surface 12b. The gap between the third and fourth damping grooves 123, 124 forms a second guide slide 125. The second guide slide 125 is provided with a second guide groove 126 extending along the Y-axis and extending parallel to the X-axis. The second guide groove 126 communicates with the third and fourth damping grooves 123, 124. The second avoidance groove 127 extends through the second top surface 12a, the second bottom surface 12b, and the second side surface 11d. The second avoidance groove 127 is connected to the third damping groove 123, the fourth damping groove 124, and the second guide groove 126. The length of the second avoidance 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 at least partially extends into the second avoidance groove 127, so that the second guide groove 126 and the second avoidance groove 127 are connected along the Y-axis. The third damping groove 123 and the second avoidance groove 127 are distributed and connected in sequence along the X-axis, and the fourth damping groove 124 and the second avoidance groove 127 are distributed and connected in sequence along the X-axis. The third damping groove 123 and the fourth damping groove 124 are used to install the third damping swing arm, and the second guide groove 126 is used to connect the third damping swing arm. The second avoidance groove 127 facilitates the connection of the second damping swing arm 52 .

[0174] Please refer to FIG. 7 , which is a schematic structural diagram of the supporting base 20 of the rotating mechanism 100 shown in FIG. 4 .

[0175] The support base 20 is elongated, with its length parallel to the Y-axis. The support base 20 can be an integrally formed structure. Alternatively, it can include a support body 20a and multiple mounting blocks 20b. The support body 20a is provided with a recessed groove extending parallel to the Y-axis. Multiple mounting blocks 20b are secured within the recessed groove to form the support base 20.

[0176] The supporting base 20 includes a first base portion and a second base portion, which are arranged in sequence along the Y-axis direction. The first base portion is located at the front side of the supporting base 20, and the second base portion is located at the rear side of the supporting base 20.

[0177] 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 the overall structure of the support base 20, improve the structural stability of the support base 20, and reduce the processing cost of the support base 20. The basic structure of each component in the second base part, the connection relationship between the components, and the connection relationship between the components and components outside the assembly can all refer to the relevant description of the first base part.

[0178] The first base portion and the second base portion each connect to one of the aforementioned substructures. In other embodiments, the first base portion and the second base portion may each connect to two groups of the aforementioned substructures. Alternatively, the first base portion and the second base portion may together connect to three groups of the aforementioned substructures. Those skilled in the art can configure these configurations based on actual needs.

[0179] FIG. 7 is a schematic structural diagram of the first portion of the supporting base 20 .

[0180] The first portion of the support base 20 includes a top support surface 20c, a bottom support surface 20d, a first side support surface 20e, and a second side support surface 20f. The top support surface 20c and the bottom support surface 20d face each other along the Z-axis, while the first side support surface 20e and the second side support surface 20f face each other along the X-axis. The first side support surface 20e connects one side of the top support surface 20c and the bottom support surface 20d, while the second side support surface 20f connects the other side of the top support surface 20c and the bottom support surface 20d.

[0181] The supporting base 20 is provided with a first main slot 21, a second main slot 22, a first mounting slot 23, and a second mounting slot 24, which are arranged in sequence along the Y-axis. The first main slot 21 and the second main slot 22 are opposite to each other in the X-axis direction and are staggered in the Y-axis direction.

[0182] The first main chute 21 is recessed toward 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 chute 21 is arcuate, extending parallel to the X-axis. The arcuate bottom surface of the second main chute 22 facilitates sliding movement of the first main swing arm 31 relative to the bearing base 20. A first stopper 211 is provided on the bottom surface of the first main chute 21, protruding from the bottom surface of the first main chute 21. Two opposing side surfaces of the first main chute 21 along the X-axis are respectively provided with a first stopper 212 and a second stopper 213. The first stopper 212 protrudes from one side surface of the first main chute 21. The first stopper 212 is located within the first main chute 21 and is spaced apart from the bottom surface of the first main chute 21. The second stopper 213 protrudes from the other side surface of the first main chute 21. The second limit block 213 is located within the first main chute 21 and is spaced apart from the bottom surface of the first main chute 21. The first main chute 21 is used to mount the first main swing arm 31. The first stop block 211, the first limit block 212, and the second limit block 213 are used to limit the first main swing arm 31 to prevent it from sliding relative to the support base 20 and from separating from the support base 20 during rotation.

[0183] The second main chute 22 is formed by recessing the bearing top surface 20c toward the bearing bottom surface 20d and extending through the first bearing side surface 20e. At least a portion of the bottom surface of the second main chute 22 is arcuate, extending parallel to the X-axis. This arcuate portion facilitates sliding of the second main swing arm 32 relative to the bearing base 20. A second stopper 221 is provided on the bottom surface of the second main chute 22, protruding from the bottom surface. A third stopper 222 and a fourth stopper 223 are provided on two opposing sides of the second main chute 22 along the X-axis, respectively. The third stopper 222 protrudes from one side surface of the second main chute 22. The third stopper 222 is located within the second main chute 22 and is spaced apart from the bottom surface of the second main chute 22. The fourth stopper 223 protrudes from the other side surface of the second main chute 22. The fourth stopper 223 is located within the second main chute 22 and is spaced apart from the bottom surface of the second main chute 22. The second main chute 22 is used to mount the second main swing arm 32. The second stopper 221, the third stopper 222, and the fourth stopper 223 are used to limit the second main swing arm 32, preventing it from sliding relative to the support base 20 and from disengaging from the support base 20 during rotation.

[0184] The first mounting groove 23 is recessed from the top surface 20c toward the bottom surface 20d and extends through the first and second side surfaces 20e and 20f. One side of the first mounting groove 23 is defined by a first mounting hole 231 and a third mounting hole 232, while the other side of the first mounting groove 23 is defined by a second and fourth mounting holes. The axial directions of the first, second, third, and fourth mounting holes 231, 232, and 233 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 of the first mounting groove 23 is located on the supporting body 20a, while the other part of the side of the first mounting groove 23 is located on a mounting block 20b that mates with the supporting body 20a and is detachably connected to the supporting body 20a. The second and fourth mounting holes are formed jointly by the mounting block 20b and the supporting body 20a. The first, second, third, and fourth mounting holes are used to connect the synchronizing assembly 40.

[0185] A guide bar 233 is provided on the bottom surface of the first mounting slot 23. The guide bar 233 protrudes from the bottom surface of the first mounting slot 23, and its length is parallel to the Y-axis. The opposite ends of the guide bar 233 connect to two opposing side surfaces of the first mounting slot 23 along the X-axis. The first mounting slot 23 is used to mount the first and second synchronous swing arms 41, 42, and synchronous slider 43. The first and second mounting holes 231 and 232 are used to connect the first synchronous swing arm 41 and synchronous slider 43, while the third and fourth mounting holes 232 and 234 are used to connect the second synchronous swing arm 42 and synchronous slider 43. The guide bar 233 guides the movement of the synchronous slider 43 along the Y-axis, preventing it from shaking during movement along the Y-axis and ensuring more stable movement of the synchronous slider 43.

[0186] The second mounting groove 24 is formed by the bearing top surface 20c being recessed toward the bearing bottom surface 20d and passing through the first bearing side surface 20e and the second bearing side surface 20f. A first fastening hole 242 and a third fastening hole 243 are provided on one side of the second mounting groove 24, and a second fastening hole 243 and a fourth fastening hole are provided on the other side of the second mounting groove 24. The axial directions of the first fastening hole 242, the second fastening hole, the third fastening hole 243, and the fourth fastening hole are all parallel to the Y-axis direction. The first fastening hole 242 is coaxial with the second fastening hole, and the third fastening hole 243 is coaxial with the fourth fastening hole. The first fastening hole 242 is connected to 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 bearing body 20a. The third fastening hole 243 is connected to the third mounting hole 232, that is, the third fastening hole 243 and the third mounting hole 232 can be a through hole formed by the mounting block 20b and the supporting 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.

[0187] A guide bar 241 is provided on the bottom surface of the second mounting slot 24. The guide bar 241 protrudes relative to the bottom surface of the second mounting slot 24, and its length is parallel to the Y-axis. The opposite ends of the guide bar 241 connect to two opposing side surfaces of the second mounting slot 24 along the X-axis. The second mounting slot 24 is used to mount the damping assembly 50, specifically, the first damping swing arm 51, the second damping swing arm 52, the first slider 53, the second slider 54, and the elastic assembly 55. The guide bar 241 guides the movement of the first slider 53 and the second slider 54 along the Y-axis, preventing them from shaking during movement along the Y-axis and ensuring more stable movement of the first slider 53 and the second slider 54.

[0188] Please refer to FIG8 , which is a schematic structural diagram of the swing arm assembly 30 of the rotating mechanism 100 shown in FIG4 .

[0189] 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.

[0190] 9 , and in combination with FIG. 8 , FIG. 9 is a schematic structural diagram of the first main swing arm 31 of the swing arm assembly 30 shown in FIG. 8 .

[0191] 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.

[0192] The first main rotating body 311 is a generally rectangular, thin plate-like structure. It is provided with a first through-hole 313. The axial direction of the first through-hole 313 is parallel to the Y-axis and extends through the first main rotating body 311 along the Y-axis. The first main rotating body 311 is configured to mate with the first fixing plate 11, and the first through-hole 313 is configured to connect to the first fixing plate 11.

[0193] The first main slider 312 has an arcuate first sliding surface 314. A first stop groove 315 is formed on the first sliding surface 314, which is recessed into the first sliding surface 314. One side surface of the first stop groove 315 serves as a first stop surface, extending parallel to the Y-axis. The first stop surface is configured to engage with the first stop block 211 within the first main chute 21 of the support base 20 to prevent the first main swing arm 311 from disengaging from the first main chute 21. The first main slider 312 includes a first body 316, a first mating block 317, and a second mating block 318. The first and second mating blocks 317, 318 are respectively fixedly connected to opposite sides of the first body 316 along the Y-axis. Both the first and second mating blocks 317, 318 are arcuate, and the surfaces of the first and second mating blocks 317, 318 facing away from the first sliding surface 314 are recessed relative to the first body 316.

[0194] The first main slider 312 is configured to engage with the support base 20. The arcuate first sliding surface 314 is configured to engage with the arcuate portion of the bottom surface of the first main chute 21, allowing the first main swing arm 31 to slide and rotate smoothly. The first stop groove 315 is configured to engage with the first stop block 211. The first engagement block 317 is configured to engage with the first limit block 212. The second engagement block 318 is configured to engage with the second limit block 213 to prevent the first main slider 312 from disengaging from the support base 20 when the first main swing arm 31 slides and rotates.

[0195] 10 , and in combination with FIG. 8 , FIG. 10 is a schematic structural diagram of the second main swing arm 32 of the swing arm assembly 30 shown in FIG. 8 .

[0196] The second main swing arm 32 has the same structure as the first main swing arm 31 and 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.

[0197] The second main rotating body 321 is a generally rectangular, thin plate-like structure. It is provided with a second through-hole 323. The axial direction of the second through-hole 323 is parallel to the Y-axis and extends through the second main rotating body 321 along the Y-axis. The second main rotating body 321 is configured to mate with the second fixing plate 12, and the second through-hole 323 is configured to connect to the second fixing plate 12.

[0198] The second main slider 322 has a second sliding surface 324 that is arcuate. A second stop groove 325 is formed on the second sliding surface 324, which is recessed into the second sliding surface 324. One side surface of the second stop groove 325 serves as a second stop surface, extending parallel to the Y-axis. The second stop surface is configured to engage with the second stop block 221 within the second main slide 22 of the support base 20 to prevent the second main swing arm 32 from disengaging from the second main slide 22. The second main slider 322 includes a second body 326, a third engaging block 327, and a fourth engaging block 328. The third and fourth engaging blocks 327, 328 are respectively fixedly connected to opposite sides of the second body 326 along the Y-axis. Both the third and fourth engaging blocks 327, 328 are arcuate, and the surfaces of the third and fourth engaging blocks 327, 328 facing away from the second sliding surface 324 are recessed relative to the second body 326.

[0199] The second main slider 322 is configured to engage with the support base 20. The curved second sliding surface 324 is configured to engage with the curved portion of the bottom surface of the second main slide groove 22, allowing the second main swing arm 32 to slide and rotate smoothly. The second stop groove 325 is configured to engage with the second stop block 221. The third engagement block 327 is configured to engage with the third limit block 222. The fourth engagement block 328 is configured to engage with the fourth limit block 223 to prevent the second main slider 322 from disengaging from the support base 20 during the sliding and rotation of the second main swing arm 32.

[0200] 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 two ends of the first fixed shaft 33 are respectively connected to the first fixing hole 118 and the second fixing 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 two ends of the second fixed shaft 34 are respectively connected to the third fixing hole 128 and the fourth fixing hole, so that the second main swing arm 32 is rotatably connected to the second fixed plate 12.

[0201] 11 and 12 , FIG. 11 is a schematic structural diagram of the synchronization assembly 40 of the rotating mechanism 100 shown in FIG. 4 , and FIG. 12 is a schematic structural diagram of the split portion of the synchronization assembly 40 shown in FIG. 11 .

[0202] As mentioned above, the synchronization assembly 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.

[0203] In this embodiment, the synchronization assembly 40 further includes a first mounting shaft 44a, a second mounting shaft 44b, a first pre-compression member 45a, a second pre-compression member 45b, a third pre-compression member 45c, a fourth pre-compression member 45d, a first adjustment member 46a, a third adjustment member 46b, a second adjustment member 47a, and a fourth adjustment member 47b. The first pre-compression member 45a, the second pre-compression member 45b, the third pre-compression member 45c, and the fourth pre-compression member 45d may all be disc springs or wave springs.

[0204] 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 retaining springs, or can be partially nuts and partially retaining springs. For example, the first adjusting member 46a and the fourth adjusting member 47b can be nuts, while the second adjusting member 47a and the third adjusting member 46b can be retaining springs. In this embodiment, the first adjusting member 46a and the third adjusting member 46b can be nuts, while the second adjusting member 47a and the fourth adjusting member 47b can be retaining springs. The first preload member 45a provides a preload 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 provided by the first preload member 45a. The second preload member 45b provides a preload 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 provided by the second preload member 45b. The third preload member 45c provides a preload between the third swing arm 42a and the synchronous slider 43. The third adjustment member 46b is used to adjust the preload provided by the third preload member 45c. The fourth preload member 45d provides a preload between the fourth swing arm 42b and the synchronous slider 43. The fourth adjustment member 47b is used to adjust the preload provided by the fourth preload member 45d.

[0205] Refer to FIG. 13 , which is a schematic structural diagram of the first synchronization swing arm 41 of the synchronization assembly 40 shown in FIG. 12 .

[0206] The first swing arm 41a includes a first swinging member 401a, a first connecting member 402a, and a first spiral member 403a, which are sequentially connected along the X-axis. The first swinging member 401a is thin and plate-shaped. A side of the first swinging member 401a along the Y-axis is provided with spaced first engaging grooves 404a. Multiple first engaging grooves 404a are spaced apart along the X-direction. A first engaging block 405a is provided between any two adjacent first engaging grooves 404a. Both the first engaging groove 404a and the first engaging block 405a are trapezoidal in shape. In this embodiment, both the first engaging groove 404a and the first engaging block 405a are isosceles trapezoidal in shape. In other embodiments, both the first engaging groove 404a and the first engaging block 405a are right-angled trapezoidal in shape. The long base of the first engaging block 405a is aligned with the opening of the first engaging groove 404a, and the short base of the first engaging block 405a is aligned with the bottom surface of the first engaging groove 404a. The first swinging body 401a is used to cooperate with the first fixing plate 11, and the first clamping groove 404a and the first clamping block 405a are used to cooperate with the second swinging arm 41b.

[0207] The first spiral body 403a is cylindrical and has a first through-hole 406a and a first spiral opening. The first through-hole 406a extends through the first spiral body 403a along the Y-axis. The first spiral body 403a includes a first inner circumferential surface 407a, a first outer circumferential surface 408a, and a first end wall 409a. The first inner circumferential surface 407a forms the wall of the first through-hole 406a, while the first outer circumferential surface 408a faces away from the first inner circumferential surface 407a. The first outer circumferential surface 408a forms the outer surface of the first spiral body 403a. The first end wall 409a connects the first inner circumferential surface 407a and the first outer circumferential surface 408a. The first through-hole 406a is circular and has a consistent diameter along the Y-axis. In other words, the curvature of the first inner circumferential surface 407a along the Y-axis is consistent, without any localized protrusions or depressions. Thus, the first through hole 406a can be processed by a mold, realizing the solution of processing the first spiral body 403a by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0208] The first spiral opening is formed by penetrating 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 409a. The first spiral opening has a first plane 410a and a first spiral surface 411a. The first plane 410a is connected to the first inner circumferential surface 407a and the first outer circumferential surface 408a on either side, respectively. The first plane 410a's opposite ends along the Y-axis are connected to the first end wall 409a and the first spiral surface 411a, respectively. The first spiral surface 411a is a curved surface extending in a spiral. The first spiral surface 411a is connected to the first inner circumferential surface 407a and the first outer circumferential surface 408a on either side, respectively. The first spiral surface 411a is connected to the first end wall 409a and the first plane 410a on either side along the Y-axis. The first spiral body 403a is configured to cooperate with the support base 20 and the synchronous slider 43. The first through hole 406 a is used to cooperate with the first installation shaft 44 a , and the first spiral opening and the first spiral surface 411 a are used to cooperate with the synchronous slider 43 .

[0209] The first connector 402a is generally S-shaped. One side of the first connector 402a is fixedly connected to the first swinging member 401a, and the other side of the first connector 402a is fixedly connected to the first spiral 403a, specifically to the first outer peripheral surface 408a of the first spiral 403a. The first spiral opening is located on the side of the first spiral 403a facing away from the first connector 402a. The first connector 402a avoids the support base 20, allowing the first spiral 403a to extend from the support base 20 and connect to the first fixed plate 11.

[0210] The second swing arm 41b includes a second swinging body 401b, a second connecting body 402b, and a second spiral body 403b, which are sequentially connected along the X-axis. The second swinging body 401b is thin and plate-shaped. Second engaging grooves 404b are spaced apart on one side of the second swinging body 401b along the Y-axis. Multiple second engaging grooves 404b are spaced apart along the X-direction. A second engaging block 405b is provided between any two adjacent second engaging grooves 404b. Both the second engaging groove 404b and the second engaging block 405b are trapezoidal in shape. In this embodiment, both the second engaging groove 404b and the second engaging block 405b are isosceles trapezoidal in shape. In other embodiments, both the second engaging groove 404b and the second engaging block 405b are right-angled trapezoidal in shape. The long base of the second engaging block 405b is aligned with the opening of the second engaging groove 404b, and the short base of the second engaging block 405b is aligned with the bottom surface of the second engaging groove 404b. The second swinging body 401b is used to cooperate with the first fixing plate 11, and the second clamping groove 404b and the second clamping block 405b are used to cooperate with the first swing arm 41a.

[0211] The second spiral body 403b is cylindrical and has a second through-hole 406b and a second spiral opening. The second through-hole 406b extends through the second spiral body 403b along the Y-axis. The second spiral body 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 forms the wall of the second through-hole 406b, while the second outer circumferential surface 408b faces away from the second inner circumferential surface 407b. The second outer circumferential surface 408b forms the outer surface of the second spiral body 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 circular and has a consistent diameter along the Y-axis. In other words, the curvature of the second inner circumferential surface 407b along the Y-axis is consistent and does not exhibit any curvature. Thus, the second through hole 406b can be processed by a mold, realizing the solution of processing the second spiral body 403b by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0212] The second spiral opening is formed by passing through 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 spiral opening has a second flat surface 410b and a second spiral surface 411b. The second spiral surface 411b has the same spiral direction as the first spiral surface 411a. The second flat surface 410b is connected to the second inner circumferential surface 407b and the second outer circumferential surface 408b on either side, and the second end wall 409b and the second spiral surface 411b are connected at opposite ends of the second flat surface 410b along the Y-axis. The second spiral surface 411b is a spirally extending curved surface. The second spiral surface 411b is connected to the second inner circumferential surface 407b and the second outer circumferential surface 408b on either side, and the second end wall 409b and the second flat surface 410b are connected at opposite ends of the second flat surface 411b along the Y-axis. The second spiral body 403b is configured to cooperate with the support base 20 and the synchronous slider 43. The second through hole 406 b is used to cooperate with the first installation shaft 44 a , and the second spiral opening and the second spiral surface 411 b are used to cooperate with the synchronous slider 43 .

[0213] The second connector 402b is generally S-shaped. One side of the second connector 402b is fixedly connected to the second swinging member 401b, and the other side of the second connector 402b is fixedly connected to the second spiral 403b, specifically to the second flat surface 410b of the second spiral 403b. The second spiral opening is located on the side of the second spiral 403b facing the second connector 402b.

[0214] Referring to FIG. 14 , FIG. 14 is a schematic diagram illustrating the structure of the second synchronization swing arm 42 of the synchronization assembly 40 shown in FIG. The second synchronization swing arm 42 has the same structure as the first synchronization swing arm 41. The third swing arm 42a is detachably connected to the fourth swing arm 42b. In other embodiments, the second synchronization swing arm 42 may have a different structure from the first synchronization swing arm 41. Specifically, the third swing arm 42a and the fourth swing arm 42b may be integrally formed.

[0215] The third swing arm 42a includes a third swinging member 421a, a third connecting member 422a, and a third spiral member 423a, which are sequentially connected along the X-axis. The third swinging member 421a is thin and plate-shaped. A side of the third swinging member 421a along the Y-axis is provided with spaced third engaging grooves 424a. Multiple third engaging grooves 424a are spaced apart along the X-direction. A third engaging block 425a is provided between any two adjacent third engaging grooves 424a. Both the third engaging groove 424a and the third engaging block 425a are trapezoidal in shape. In this embodiment, both the third engaging groove 424a and the third engaging block 425a are isosceles trapezoidal in shape. In other embodiments, both the third engaging groove 424a and the third engaging block 425a are right-angled trapezoidal in shape. The long base of the third engaging block 425a is aligned with the opening of the third engaging groove 424a, and the short base of the third engaging block 425a is aligned with the bottom surface of the third engaging groove 424a. The third swinging body 421a is used to cooperate with the second fixing plate 12, and the third clamping groove 424a and the third clamping block 425a are used to cooperate with the fourth swing arm 42b.

[0216] The third spiral body 423a is cylindrical and has a third through-hole 426a and a third spiral opening. The third through-hole 426a extends through the third spiral body 423a along the Y-axis. The third spiral body 423a includes a third inner circumferential surface 427a, a third outer circumferential surface 428a, and a third end wall 429a. The third inner circumferential surface 427a forms the wall of the third through-hole 426a, while the third outer circumferential surface 428a faces away from the third inner circumferential surface 427a. The third outer circumferential surface 428a forms the outer surface of the third spiral body 423a. The third end wall 429a connects the third inner circumferential surface 427a and the third outer circumferential surface 428a. The third through-hole 426a is circular and has a consistent diameter along the Y-axis. In other words, the curvature of the third inner circumferential surface 427a along the Y-axis is consistent and does not exhibit any curvature. Thus, the third through hole 426a can be processed by a mold, realizing the solution of processing the third spiral body 423a by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0217] The third spiral opening is formed by passing through 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 spiral opening has a third flat surface 430a and a third spiral surface 431A. The third flat surface 430a is connected to the third inner circumferential surface 427a and the third outer circumferential surface 428a on either side, respectively. Opposite ends of the third flat surface 430a along the Y-axis are connected to the third end wall 429a and the third spiral surface 431A, respectively. The third spiral surface 431A is a spirally extending curved surface. The third spiral surface 431A is connected to the third inner circumferential surface 427a and the third outer circumferential surface 428a on either side, respectively. Opposite ends of the third spiral surface 431A along the Y-axis are connected to the third end wall 429a and the third flat surface 430a, respectively. The third spiral body 423a is configured to cooperate with the support base 20 and the synchronous slider 43. The third through hole 426 a is used to cooperate with the second installation shaft 44 b , and the third spiral opening and the third spiral surface 431A are used to cooperate with the synchronous slider 43 .

[0218] The third connector 422a is generally S-shaped. One side of the third connector 422a is fixedly connected to the third swinging member 421a, and the other side of the third connector 422a is fixedly connected to the third spiral 423a, specifically to the third outer peripheral surface 428a of the third spiral 423a. The third spiral opening is located on the side of the third spiral 423a facing away from the third connector 422a.

[0219] The fourth swing arm 42b includes a fourth swinging body 421b, a fourth connecting body 422b, and a fourth spiral body 423b, which are sequentially connected along the X-axis. The fourth swinging body 421b is thin and plate-shaped. A side of the fourth swinging body 421b along the Y-axis is provided with spaced fourth engaging grooves 424b. The plurality of fourth engaging grooves 424b are spaced apart along the X-direction. The interval between any two adjacent fourth engaging grooves 424b is a fourth engaging block 425b. Both the fourth engaging groove 424b and the fourth engaging block 425b are trapezoidal. In this embodiment, both the fourth engaging groove 424b and the fourth engaging block 425b are isosceles trapezoidal in shape. In other embodiments, both the fourth engaging groove 424b and the fourth engaging block 425b are right-angled trapezoidal in shape. The long bottom edge of the fourth engaging block 425b is aligned with the opening of the fourth engaging slot 424b, and the short bottom edge of the fourth engaging block 425b is aligned with the bottom surface of the fourth engaging slot 424b. The fourth swinging member 421b is configured to engage with the second fixing plate 12, and the fourth engaging slot 424b and the fourth engaging block 425b are configured to engage with the third swing arm 42a.

[0220] The fourth spiral 423b is cylindrical and has a fourth through hole 426b and a fourth spiral opening. The fourth through hole 426b extends through the fourth spiral 423b along the Y-axis. The fourth spiral 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 forms the wall of the fourth through hole 426b, while the fourth outer circumferential surface 428b faces away from the fourth inner circumferential surface 427b. The fourth outer circumferential surface 428b forms the outer surface of the fourth spiral 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, with a consistent diameter along the Y-axis. In other words, the curvature of the fourth inner circumferential surface 427b along the Y-axis is consistent, without any bending or other issues. Thus, the fourth through hole 426b can be processed by a mold, realizing the solution of processing the fourth spiral body 423b by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0221] The fourth spiral opening is formed by penetrating 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 spiral opening has a fourth plane and a fourth spiral surface 431B. The spiral direction of the fourth spiral surface 431B is the same as that of the third spiral surface 431A. The fourth plane is connected to the fourth inner circumferential surface 427b and the fourth outer circumferential surface 428b on either side, and the fourth end wall and the fourth spiral surface 431B are connected at opposite ends of the fourth plane along the Y-axis. The fourth spiral surface 431B is a spirally extending curved surface. The fourth spiral surface 431B is connected to the fourth inner circumferential surface 427b and the fourth outer circumferential surface 428b on either side, and the fourth end wall and the fourth plane on opposite ends of the fourth spiral surface 431B along the Y-axis. The fourth spiral body 423b is configured to cooperate with the support base 20 and the synchronous slider 43. The fourth through hole 426 b is used to cooperate with the second installation shaft 44 b , and the fourth spiral opening and the fourth spiral surface 431B are used to cooperate with the synchronous slider 43 .

[0222] The fourth connector 422b is generally S-shaped. One side of the fourth connector 422b is fixedly connected to the fourth swinging member 421b, and the other side of the fourth connector 422b is fixedly connected to the fourth spiral 423b, specifically to the fourth flat surface of the fourth spiral 423b. The fourth spiral opening is located on the side of the fourth spiral 423b facing the fourth connector 422b.

[0223] 15 , which is a schematic structural diagram of the synchronization slider 43 of the synchronization assembly 40 shown in FIG. 12 .

[0224] The synchronous slider 43 includes a synchronous 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 either side of the synchronous body 431 along the X-axis direction, and the first connecting block 434 and the second connecting block 435 are located on either side of the synchronous 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 synchronous body 431, and the second spiral block 433 and the second connecting block 435 are located on the same side of the synchronous body 431.

[0225] The synchronizer body 431 is roughly rectangular and includes a first synchronizer surface 431a and a second synchronizer surface 431b, which face each other along the Z-axis, and a first synchronizer side surface 431c, which face each other along the X-axis. The first synchronizer side surface connects one side of the first synchronizer surface 431a and one side of the second synchronizer surface 431b, while the second synchronizer side surface 431c connects the other side of the first synchronizer surface 431a and the other side of the second synchronizer surface 431b. Both the first synchronizer side surface 431c and the second synchronizer side surface 431c are inclined arcuate surfaces. They are both inclined relative to the central axis of the synchronizer slider 43 along the Z-axis, and their inclinations are directed away from the central axis of the synchronizer slider 43 along the axial direction.

[0226] The synchronizer 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 extends through the first synchronizer side surface 431b and the second synchronizer surface 431b, while the second ejection groove 431d extends through the second synchronizer side surface 431c and the second synchronizer surface 431b. The first and second ejection grooves 431d are both roughly triangular in shape. The first and second ejection grooves 431d facilitate the use of molds for the synchronizer slider 43. The guide groove 431e is formed by the second synchronizer surface 431b being recessed toward the first synchronizer surface 431a. The guide groove 431e extends through the synchronizer body 431 along the Y-axis. The guide groove 431e is used to cooperate with the guide bar 233 to enable the synchronizer slider 43 to slide along the Y-axis under the guidance of the guide bar 233, thereby increasing the sliding stability of the synchronizer slider 43.

[0227] The first spiral block 432 is formed as a protrusion along the first synchronous side surface and is provided with 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 and second connecting surfaces 432b face each other in the Y-axis direction and are both flat. The first through-hole 432a extends through the first and second connecting surfaces 432b. The first inner wall surface 432c and the first outer wall surface 432d are both arcuate surfaces. A portion of the first inner wall surface 432c forms the wall surface of the first through-hole 432a, while the first outer wall surface 432d faces away from the first inner wall surface 432c and forms the outer surface of the first spiral block 432.

[0228] Both the first mating surface 432e and the second mating surface 432f extend in a spiral pattern around the axial direction of the first through-hole 432a. The first mating surface 432e and the second mating surface 432f have the same spiral direction and are located on opposite sides of the first through-hole 432a along the Y-axis. The first mating surface 432e has two opposing sides connected to the first inner wall surface 432c and the first outer wall surface 432d, respectively. Its two ends in the extension direction are connected to the first synchronous side surface and the first connecting surface, respectively. The second mating surface 432f has two opposing sides connected to the first inner wall surface 432c and the first outer wall surface 432d, respectively. Its two ends in the extension direction are connected to the first synchronous side surface and the second connecting surface 432b, respectively. The first through hole 432a is used to cooperate with the first installation shaft 44a, the first matching surface 432e is used to cooperate with the first helical surface 411a, and the second matching surface 432f is used to cooperate with the second helical surface 411b.

[0229] The portion of the first inner wall surface 432c that forms the hole wall surface 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 that forms the hole wall surface of the first through hole 432a and the remaining portion of the first inner wall surface 432c along the X-axis direction are consistent. In other words, the first through hole 432a is a circular hole with a constant aperture. As a result, when the first through hole 432a is processed using a mold, the mold can be ejected along the Y-axis direction, achieving the purpose of processing the first through hole 432a using the 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 the second mating surface 432f is processed using a mold, the mold can be ejected along the Z-axis direction, achieving the purpose of processing the second mating surface 432f using the mold. As a result, the first spiral block 432 can be manufactured using a mold.

[0230] The second helical block 433 has the same structure as the first helical block 432, and the two helical blocks 433 are symmetrical relative to the synchronizer body 431. The second helical block 433 is formed as a protrusion along the second synchronizer side surface 431c and is provided with a second through-hole 433a extending along the Y-axis. The second helical 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 and fourth connecting surfaces 433b face opposite each other along the Y-axis and are both flat. The second through-hole 433a extends through the third and fourth connecting surfaces 433b. The second inner wall surface 433c and the second outer wall surface 433d are both arcuate surfaces. A portion of the second inner wall surface 433c forms the wall surface of the second through-hole 433a, while the second outer wall surface 433d faces away from the second inner wall surface 433c.

[0231] The third mating surface 433e and the fourth mating surface 433f both extend in a spiral pattern around the axial direction of the second through-hole 433a. The third mating surface 433e and the fourth mating surface 433f have the same spiral direction and are located on opposite sides of the second through-hole 433a along the Y-axis. Opposite sides of the third mating surface 433e along the extension direction are connected to the second inner wall surface 433c and the second outer wall surface 433d, respectively. The ends of the third mating surface 433e along the extension direction are connected to the second synchronous side surface 431c and the third connecting surface, respectively. Opposite sides of the fourth mating surface 433f along the extension direction are connected to the second inner wall surface 433c and the second outer wall surface 433d, respectively. The 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 cooperate with the second installation shaft 44b, the third matching surface 433e is used to cooperate with the third helical surface 431A, and the fourth matching surface 433f is used to cooperate with the fourth helical surface 431B.

[0232] The portion of the second inner wall surface 433c that forms the hole wall surface of the second through hole 433a and the remaining portion of the second inner wall surface 433c are connected in the Y-axis direction. The portion of the second inner wall surface 433c that forms the hole wall surface of the second through hole 433a and the remaining portion of the second inner wall surface 433c that form the hole wall surface of the second through hole 433a have the same curvature along the X-axis direction. In other words, the second through hole 433a is a circular hole with a constant aperture. As a result, when the second through hole 433a is processed using a mold, the mold can be ejected along the Y-axis direction, achieving the second through hole 433a being processed using the mold, and the third mating surface 433e is processed 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 the fourth mating surface 433f is processed using a mold, the mold can be ejected along the Z-axis direction, achieving the fourth mating surface 433f being processed using the mold. As a result, the second spiral block 433 can be manufactured using a mold.

[0233] The first connecting block 434 is formed as a projection along the first synchronization side surface and is provided with a first through-hole 434a, which extends through the first connecting block 434 along the Y-axis. The second connecting block 435 is formed as a projection along the second synchronization side surface 431c and is provided with a second through-hole 435a, which extends through the second connecting block 435 along the Y-axis. The first through-hole 434a is coaxial with the first through-hole 432a, while 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 designed to mate with the first mounting shaft 44a, while the second through-hole 435a and the second through-hole 433a are designed to mate with the second mounting shaft 44b.

[0234] 16 and 17 , FIG. 16 is a schematic structural diagram of the damping assembly 50 of the rotating mechanism 100 shown in FIG. 4 , and FIG. 17 is a schematic structural diagram of the split body of the damping assembly 50 shown in FIG. 16 .

[0235] 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. The first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are all springs. In other embodiments, the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are all rubber members.

[0236] 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.

[0237] Refer to FIG. 18 , which is a schematic structural diagram of the first damping swing arm 51 of the damping assembly 50 shown in FIG. 17 .

[0238] 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 for sliding and rotating connection with the first fixed plate 11, and the first rotating body 512 is used for rotating connection with the first sliding member 53, the second sliding member 54 and the supporting base 20.

[0239] The first sliding body 511 is thin 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 long and parallel to the Y-axis. The first and second sliding arms 514, 515 are both rectangular and parallel to the X-axis. The widths of the first and second sliding arms 514, 515 along the Y-axis are smaller than the length of the first connecting arm 513 along the Y-axis.

[0240] 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 spaced apart along the Y-axis direction. 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. The first sliding cylinder 516 and the second sliding cylinder 517 are both cylindrical. The first sliding cylinder 516 is provided with a first sliding hole 516a, and the second sliding cylinder 517 is provided with a second sliding hole 517a. The axial directions of the first sliding hole 516a and the second sliding hole 517a are both parallel to the Y-axis direction, 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 cooperate with the first connecting shaft.

[0241] 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 is provided with a first rotating hole 512e, and the second rotating cylinder 512b is provided with a second rotating hole 512f. The first and second rotating cylinders 512a, 512b are both fixedly connected to the side of the first connecting arm 513 facing away from the first sliding arm 514 and the second sliding arm 515. The first and second rotating cylinders 512a, 512b are spaced apart along the Y-axis, and the first, second, and first connecting arm 513 are arranged in a U-shape. The axial directions of the first and second rotating holes 512e, 512f are both parallel to the Y-axis, and the first and second rotating holes 512e, 512f are coaxial. The first concave cam 512c is fixedly connected to a side surface 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 a side surface of the second rotating cylinder 512b and is coaxial with the second rotating hole 512f. A side surface of the first rotating cylinder 512a and a side surface of the second rotating cylinder 512b are spaced apart from each other, and the first concave cam 512c and the second concave cam 512d are spaced apart from each other. The first concave cam 512c includes a plurality of first recesses (not shown) and a plurality of first protrusions (not shown), and the plurality of first recesses and the plurality of first protrusions are alternately distributed. The second concave cam 512d includes a plurality of second recesses (not shown) and a plurality of second protrusions (not shown), and the plurality of second recesses and the plurality of second protrusions are alternately distributed.

[0242] Refer to FIG. 19 , which is a schematic structural diagram of the second damping swing arm 52 of the damping assembly 50 shown in FIG. 17 .

[0243] 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 member 521 and a second rotating member 522 fixedly connected along the X-axis. The second sliding member 521 is slidably and rotationally connected to the second fixed plate 12, while the second rotating member 522 is rotationally connected to the first sliding member 53, the second sliding member 54, and the supporting base 20.

[0244] The second sliding body 521 is thin 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 long and parallel to the Y-axis. The third and fourth sliding arms 524, 525 are both rectangular and parallel to the X-axis. The width of the third and fourth sliding arms 524, 525 along the Y-axis is smaller than the length of the second connecting arm 523 along the Y-axis.

[0245] 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 arm 524 and the fourth sliding arm 525 are spaced apart 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. The third sliding cylinder 526 and the fourth sliding cylinder 527 are both 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 the third sliding hole 526a and the fourth sliding hole 527a are both parallel to the Y-axis and are coaxial with each other. The third sliding hole 526a and the fourth sliding hole 527a are configured to mate with the second connecting shaft.

[0246] 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 is provided with a third rotating hole 522e, and the fourth rotating cylinder 522b is provided with 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 facing away from the third sliding arm 524 and the fourth sliding arm 525. The third rotating cylinder 522a and the fourth rotating cylinder 522b are spaced apart along the Y-axis and arranged in a U-shape with the second connecting arm 523. The axes of the third rotating hole 522e and the fourth rotating hole 522f are both parallel to the Y-axis and are coaxial with each other. The third concave cam 522c is fixedly connected to a side surface 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 a side surface of the fourth rotating cylinder 522b and is coaxial with the fourth rotating hole 522f. A side surface of the third rotating cylinder 522a and a side surface of the fourth rotating cylinder 522b are spaced apart from each other, and the third concave cam 522c and the fourth concave cam 522d are spaced apart from each other. The third concave cam 522c includes a plurality of third recesses (not shown) and a plurality of third protrusions (not shown), with the plurality of third recesses and the plurality of third protrusions being alternately arranged. The fourth concave cam 522d includes a plurality of fourth recesses (not shown) and a plurality of fourth protrusions (not shown), with the plurality of fourth recesses and the plurality of fourth protrusions being alternately arranged.

[0247] Refer to FIG. 20 , which is a schematic structural diagram of the first sliding member 53 of the damping assembly 50 shown in FIG. 17 .

[0248] 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 is provided with a first connecting hole 534, a fifth connecting hole 536, a seventh connecting hole 537, and a third connecting hole 535, which are spaced apart along the X-axis. The first connecting hole 534, the fifth connecting hole 536, the seventh connecting hole 537, and the third connecting hole 535 all extend through 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 a 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 a plurality of first mating recesses (not shown) and a plurality of first mating protrusions (not shown), which are alternately arranged. The third mating wheel 533 includes multiple third mating recesses (not labeled) and multiple third mating protrusions (not labeled), which are alternately arranged. A first guide groove 538 is provided on one side of the first slider 531. The first guide groove 538 extends through the first slider 531 along the Y-axis and extends parallel to the Y-axis. The first mating wheel 532 is configured to engage with the first concave cam 512c, while the third mating wheel 533 is configured to engage with the third concave cam 522c. The first connecting hole 534 is configured to engage with the first connecting rod 56a, the third connecting hole 535 is configured to engage with the second connecting rod 56b, the fifth connecting hole 536 is configured to engage with the third connecting rod 56c, and the seventh connecting hole 537 is configured to engage with the fourth connecting rod 56d. The first guide groove 538 is configured to engage with the guide bar 241 to guide the movement of the first slider 531 along the Y-axis, preventing it from shaking during movement along the Y-axis and ensuring more stable movement of the first slider 53.

[0249] Refer to FIG. 21 , which is a schematic structural diagram of the second sliding member 54 of the damping assembly 50 shown in FIG. 17 .

[0250] The structure of the second sliding member 54 is identical to 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, spaced apart 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 extend through the second slider 541 along the Y-axis. The second mating wheel 542 and the fourth mating wheel 543 have identical structures and are both fixedly connected to a surface of the second slider 541. The second mating wheel 542 is coaxial with the second connecting hole 544, while 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) and a plurality of second mating protrusions (not shown), with the plurality of second mating recesses and the plurality of second mating protrusions being alternately arranged. The fourth mating wheel 543 includes a plurality of fourth mating recesses (not labeled) and a plurality of fourth mating protrusions (not labeled), with the plurality of fourth mating recesses and the plurality of fourth mating protrusions being alternately arranged. A second guide groove 548 is provided on one side of the second slider 541. The second guide groove 548 extends through the second slider 541 along the Y-axis direction and extends parallel to the Y-axis direction. The second mating wheel 542 is configured to mate with the second concave cam 512d, and the fourth mating wheel 543 is configured to mate with the fourth concave cam 522d. The second connecting hole 544 is configured to mate with the first connecting rod 56a, the fourth connecting hole 545 is configured to mate with the second connecting rod 56b, the sixth connecting hole 546 is configured to mate with the third connecting rod 56c, and the eighth connecting hole 547 is configured 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 to prevent the second slider 541 from shaking when moving along the Y-axis direction, so that the movement of the second sliding member 54 is more stable.

[0251] In this embodiment, referring to FIG. 5 , the first fixing plate 11 and the second fixing plate 12 are respectively located on two opposite sides of the supporting base 20 .

[0252] Referring to Figures 4, 8 and 9, the first main swing arm 31 is rotatably connected to the bearing base 20. Specifically, at least part of the first main sliding body 312 of the first main swing arm 31 is located in the first main slide groove 21 of the bearing base 20, and the first sliding surface 314 of the first main sliding body 312 faces the arc-shaped portion of the groove bottom surface of the first main slide groove 21, so that the first main sliding body 312 slides and rotates along the groove bottom surface of the first main slide groove 21, so that the first main swing arm 31 slides and rotates relative to the bearing base 20. The first engaging block 317 of the first main slider 312 is located in the gap between the first limiting block 212 and the bottom surface of the first main slot 21, and the second engaging block 318 is located in the gap between the second limiting block 213 and the bottom surface of the first main slot 21. When the first main slider 312 slides and rotates, the first engaging block 317 and the second engaging block 318 restrict the movement of the first main slider 312 along the Z-axis direction, preventing the first main slider 312 from escaping from the first main slot 21 along the Z-axis direction. The first stopping block 211 in the first main slot 21 of the support base 20 is located in the first stopping groove 315 of the first main slider 312. When the first main slider 312 slides and rotates relative to the support base 20, the first stopping block 211 abuts against the first stopping surface of the first stopping groove 315, preventing the first main slider 312 from sliding out of the first main slot 21 along the X-axis direction.

[0253] At least a portion of the first main rotating element 311 of the first main swing arm 31 is located within the first rotation slot 111 of the first fixed plate 11. The first fixing hole 118, the first through-hole 313, and the second fixing hole are coaxial. A first fixed shaft 33 passes through the first through-hole 313, and opposite ends of the first fixed shaft 33 are fixed in the first fixing hole 118 and the second fixing hole, respectively. This allows the first main rotating element 311 to rotate about the first fixed shaft 33, thereby enabling the first main swing arm 31 to rotate relative to the first fixed plate 11.

[0254] With reference to Figures 4, 8 and 10, the 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 in the second main slide groove 22 of the bearing base 20, wherein the second matching block 318 of the second main sliding body 322 is located in the gap between the third limit block 222 and the groove bottom surface of the second main slide groove 22, and the fourth matching block 328 is located in the gap between the fourth limit block 223 and the groove bottom surface of the second main slide groove 22; the second sliding surface 324 of the second main sliding body 322 faces the arc-shaped portion of the groove bottom surface of the second main slide groove 22, so that the second main sliding body 322 slides and rotates along the groove bottom surface of the second main slide groove 22, so that the second main swing arm 32 slides and rotates relative to the bearing base 20. The third engaging block 327 of the second main slider 322 is located within the gap between the third limiting block 222 and the bottom surface of the second main slot 22. The fourth engaging block 328 is located within the gap between the fourth limiting block 223 and the bottom surface of the second main slot 22. As the second main slider 322 slides and rotates, the third engaging block 327 and the fourth engaging block 328 restrict movement of the second main slider 322 along the Z-axis, preventing the second main slider 322 from disengaging from the second main slot 22 along the Z-axis. The second stop block 221 within the second main slot 22 of the support base 20 is located within the second stop groove 325 of the second main slider 322. When the second main slider 322 slides and rotates relative to the support base 20, the second stop block 221 abuts against the second stop surface of the second stop groove 325, preventing the second main slider 322 from sliding out of the second main slot 22 along the X-axis.

[0255] At least a portion of the second main rotating element 321 of the second main swing arm 32 is located within the second rotation slot 121 of the second fixing plate 12. The third fixing hole 128, the second through-hole 323, and the fourth fixing hole are coaxial. The second fixing shaft 34 passes through the second through-hole 323, with opposite ends of the second fixing shaft 34 secured to the third fixing hole 128 and the fourth fixing hole, respectively. This allows the second main rotating element 321 to rotate about the second fixing shaft 34, thereby enabling the second main swing arm 32 to rotate relative to the second fixing plate 12.

[0256] In this embodiment, referring to Figures 11 and 12 , the first adjusting member 46a, the first pre-loading member 45a, the first spiral 403a, the portion of the first spiral block 432 provided with the first through-hole 432a, the second spiral 403b, the second pre-loading member 45b, the second adjusting member 47a, and the first connecting block 434 are located on the same side of the synchronizing body 431 and are arranged sequentially along the Y-axis. The first adjusting member 46a is a nut. The threaded hole of the first adjusting member 46a, the hollow portion of the first pre-loading member 45a, the first through-hole 406a of the first spiral 403a, the first through-hole 432a of the first spiral block 432, the second through-hole 406b of the second spiral 403b, the hollow portion of the second pre-loading member 45b, the hollow portion of the second adjusting member 47a, and the first through-hole 434a of the first connecting block 434 are all coaxial. The first mounting shaft 44a sequentially passes through the threaded hole of the first adjusting member 46a, the hollow portion of the first preloading member 45a, the first through-hole 406a of the first spiral 403a, the first through-hole 432a of the first spiral block 432, the second through-hole 406b of the second spiral 403b, the hollow portion of the second preloading 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 403a and the second spiral 403b can rotate around the first mounting shaft 44a.

[0257] The first swinging body 401a of the first swinging arm 41a and the second swinging body 401b of the second swinging arm 41b cooperate. One of the first swinging arm 41a and the second swinging arm 41b is provided with a snap-in groove, and the other of the first swinging arm 41a and the second swinging arm 41b is provided with a snap-in block; the snap-in block is snap-into the snap-in groove. The first swinging arm 41a and the second swinging arm 41b are detachably connected by the snap-in groove and the snap-in block, which has a simple structure, is easy to process, and has low cost. In this embodiment, the first snap-in block 405a of the first swinging body 401a is located in the second snap-in groove 404b of the second swinging body 401b, and the second snap-in block 405b of the second swinging body 401b is located in the first snap-in groove 404a of the first swinging body 401a. The first engaging groove 404a, the first engaging block 405a, the second engaging groove 404b and the second engaging block 405b are all trapezoidal structures, which can prevent the first swinging body 401a and the second swinging body 401b from loosening after being matched, and ensure the stability of the matching between the first swinging body 401a and the second swinging body 401b.

[0258] In other embodiments, the first swing arm 41a and the second swing arm 41b can be connected by an elastic buckle. Specifically, the 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 is engaged in the inner groove to achieve a detachable connection between the first swing arm 41a and the second swing arm 41b.

[0259] The first spiral body 403a cooperates with the first spiral block 432 and the synchronous body 431 of the synchronous slider 43, respectively. Specifically, the first outer peripheral surface 408a of the first spiral body 403a faces the first synchronous side surface, and the first spiral body 403a can slide along the first synchronous side surface. A portion of the first spiral block 432 of the synchronous slider 43 is located within the first spiral opening of the first spiral body 403a, and the first spiral surface 411a of the first spiral body 403a cooperates with the first mating surface 432e of the synchronous slider 43. The first spiral surface 411a faces the first mating surface 432e, and at least a portion of the first spiral surface 411a abuts the first mating surface 432e. The first end wall surface 409a of the first spiral body 403a abuts the first connecting surface of the first spiral block 432.

[0260] The second spiral body 403b mates with the first spiral block 432 and the synchronizing body 431 of the synchronizing slider 43, respectively. Specifically, the second outer peripheral surface 408b of the second spiral body 403b faces the first synchronizing side surface, and the second spiral body 403b can slide along the first synchronizing side surface. Another portion of the first spiral block 432 of the synchronizing slider 43 is located within the second spiral opening of the second spiral body 403b, and the second spiral surface 411b of the second spiral body 403b mates with the second mating surface 432f of the synchronizing slider 43. The second spiral surface 411b faces the second mating surface 432f, and at least a portion of the second spiral surface 411b abuts the second mating surface 432f. The second end wall surface 409b of the second spiral body 403b faces the second connecting surface 432b of the first spiral block 432, and there is a gap between the second end wall surface 409b and the second connecting surface 432b in the Y-axis direction.

[0261] The third adjusting member 46b, the third pre-loading member 45c, the third spiral 423a, the portion of the second spiral block 433 provided with the second through-hole 433a, the fourth spiral 423b, the fourth pre-loading member 45d, the fourth adjusting member 47b, and the second connecting block 435 are located on the same side of the synchronizing body 431 and are arranged sequentially along the Y-axis. The third adjusting member 46b is a nut. The threaded hole of the third adjusting member 46b, the hollow portion of the third pre-loading member 45c, the third through-hole 426a of the third spiral 423a, the second through-hole 433a of the second spiral block 433, the fourth through-hole 426b of the fourth spiral 423b, the hollow portion of the third pre-loading member 45c, the hollow portion of the fourth adjusting member 47b, and the second through-hole 435a of the second connecting block 435 are all coaxial. The second mounting shaft 44b sequentially passes through the threaded hole of the third adjustment member 46b, the hollow portion of the third preload member 45c, the third through-hole 426a of the third spiral 423a, the second through-hole 433a of the second spiral block 433, the fourth through-hole 426b of the fourth spiral 423b, the hollow portion of the fourth preload member 45d, the hollow portion of the fourth adjustment member 47b, and the second through-hole 435a of the second connecting block 435. The third and fourth spirals 423a, 423b are rotatable about the second mounting shaft 44b.

[0262] The third swinging body 421a of the third swinging arm 42a cooperates with the fourth swinging body 421b of the fourth swinging arm 42b. One of the third swinging arm 42a and the fourth swinging arm 42b is provided with a snap-in slot, and the other of the third swinging arm 42a and the fourth swinging arm 42b is provided with a snap-in block; the snap-in block is snap-into the snap-in slot. The snap-in slot and the snap-in block allow the third swinging arm 42a and the fourth swinging arm 42b to be detachably connected, resulting in a simple structure, easy processing, and low cost. In this embodiment, the third snap-in block 425a of the third swinging body 421a is located in the fourth snap-in slot 424b of the fourth swinging body 421b, and the fourth snap-in block 425b of the fourth swinging body 421b is located in the third snap-in slot 424a of the third swinging body 421a. The third engaging groove 424a, the third engaging block 425a, the fourth engaging groove 424b and the fourth engaging block 425b are all trapezoidal structures, which can prevent the third swinging body 421a and the fourth swinging body 421b from loosening after being matched, and ensure the stability of the matching between the third swinging body 421a and the fourth swinging body 421b.

[0263] In other embodiments, a resilient buckle is provided on one side of the third swing arm 42a, which serves as the aforementioned snap-in block. An inner groove is provided on one side of the fourth swing arm 42b, which serves as the aforementioned snap-in slot. The resilient buckle snaps into the inner groove, thereby achieving a detachable connection between the third and fourth swing arms 42a, 42b.

[0264] The third spiral body 423a mates with the second spiral block 433 and the synchronizing body 431 of the synchronizing slider 43, respectively. Specifically, the third outer peripheral surface 428a of the third spiral body 423a faces the second synchronizing side surface 431c, and the third spiral body 423a can slide along the second synchronizing side surface 431c. A portion of the second spiral block 433 of the synchronizing slider 43 is located within the third spiral opening of the third spiral body 423a, and the third spiral surface 431A of the third spiral body 423a mates with the third mating surface 433e of the synchronizing slider 43. The third spiral surface 431A faces the third mating surface 433e, and at least a portion of the third spiral surface 431A abuts the third mating surface 433e. The third end wall surface 429a of the third spiral body 423a abuts the third connecting surface of the second spiral block 433.

[0265] The fourth spiral 423b mates with the second spiral block 433 and the synchronizing body 431 of the synchronizing slider 43, respectively. Specifically, the fourth outer peripheral surface 428b of the fourth spiral 423b faces the second synchronizing side surface 431c, and the fourth spiral 423b can slide along the second synchronizing side surface 431c. Another portion of the second spiral block 433 of the synchronizing slider 43 is located within the fourth spiral opening of the fourth spiral 423b, and the fourth spiral surface 431B of the fourth spiral 423b mates with the fourth mating surface 433f of the synchronizing slider 43. The fourth spiral surface 431B faces the fourth mating surface 433f, and at least a portion of the fourth spiral surface 431B abuts against the fourth mating surface 433f. The fourth end wall of the fourth spiral 423b faces the fourth connecting surface 433b of the second spiral block 433, and there is a gap between the fourth end wall and the fourth connecting surface 433b in the Y-axis direction.

[0266] In this embodiment, referring to Figures 4, 11, and 12, the first spiral 403a of the first swing arm 41a, the second spiral 403b of the second swing arm 41b, the third spiral 423a of the third swing arm 42a, the fourth spiral 423b of the fourth swing arm 42b, the synchronous slider 43, the first mounting shaft 44a, the second mounting shaft 44b, the first pre-pressing member 45a, the second pre-pressing member 45b, the third pre-pressing member 45c, the fourth pre-pressing 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 in the first mounting groove 23 of the support base 20. The guide bar 233 in the first mounting groove 23 is at least partially located in the guide groove 431e of the synchronous body 431. The first spiral 403a, the second spiral 403b, the third spiral 423a, and the third spiral 423a can all slide and rotate relative to the synchronization slider 43. The synchronization slider 43 slides along the guide bar 233 to synchronize the movement of the first spiral 403a, the second spiral 403b, the third spiral 423a, and the third spiral 423a. One end of the synchronization slider 43 along the Y-axis is aligned with the first spiral 403a of the first swing arm 41a and the third spiral 423a of the third swing arm 42a. The other end of the synchronization slider 43 along the Y-axis is aligned with the second spiral 403b of the second swing arm 41b and the fourth spiral 423b of the fourth swing arm 42b.

[0267] One end of the first mounting shaft 44a extending from the first adjustment member 46a is located in the first mounting hole 231, and one end of the first mounting shaft 44a extending from 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 from the third adjustment member 46b is fixed in the third mounting hole 232, and one end of the second mounting shaft 44b extending from 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 and the supporting body 20a that form the second and fourth mounting holes are disassembled. The end of the first mounting shaft 44a extending from the threaded hole of the first adjustment member 46a first extends into the first mounting hole 231, and the end of the first mounting shaft 44a extending from the first connecting block 434 is located at the portion of the supporting body 20a that forms the second mounting hole. The end of the second mounting shaft 44b extending from the threaded hole of the third adjustment member 46b first extends into the third mounting hole 232. The end of the second mounting shaft 44b extending from the second connecting block 435 is located at the portion of the carrier body 20a that forms the fourth mounting hole. The mounting block 20b forming the second and fourth mounting holes is then assembled onto the carrier body 20a, such that the end of the first mounting shaft 44a extending from the first connecting block 434 is located within the second mounting hole, and the end of the second mounting shaft 44b extending from the second connecting block 435 is located within the fourth mounting hole. The side of the first adjustment member 46a facing away from the first pre-pressing member 45a faces one wall of the first mounting groove 23, while the side of the first connecting block 434 facing away from the second adjustment member 47a faces the other wall of the first mounting groove 23. The side of the third adjustment member 46b facing away from the third pre-pressing member 45c faces one wall of the first mounting groove 23, while the side of the second connecting block 435 facing away from the fourth adjustment member 47b faces the other side of the second mounting groove 24.

[0268] The first adjusting member 46a is threadedly connected to the first mounting shaft 44a. When the first adjusting member 46a is rotated, the force applied by the first adjusting member 46a to the first pre-loaded member 45a is adjusted as the first adjusting member 46a moves toward or away from the first pre-loaded member 45a on the first mounting shaft 44a, thereby adjusting the preloaded force provided by the first pre-loaded member 45a to the first swing arm 41a. Specifically, when the first adjusting member 46a is rotated, the first adjusting member 46a pushes the first pre-loaded member 45a, causing the first pre-loaded member 45a to be compressed more, thereby increasing the force applied to the first spiral 403a of the first swing arm 41a. This increases the preloaded force between the first spiral 403a and the first spiral block 432, thereby improving the contact between the first spiral surface 411a and the first mating surface 432e. When the first adjusting piece 46a is screwed so that the first adjusting piece 46a moves in a direction away from the first pre-compression piece 45a, the force exerted by the first adjusting piece 46a on the first pre-compression piece 45a is reduced, the compression amplitude of the first pre-compression piece 45a is reduced, and the pre-tightening force between the first spiral body 403a and the first spiral block 432 is reduced.

[0269] The second adjusting member 47a is a retaining spring. Under the action of an external force, the position of the second adjusting member 47a on 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 adjusting the preload force applied by the second preload member 45b to the second swing arm 41b. Specifically, when the external force causes the second adjusting member 47a to move closer to the second preload member 45b, the force applied by the second adjusting member 47a to the second preload member 45b increases, causing the compression of the second preload member 45b to increase. Consequently, the force applied by the second preload member 45b to the second helical body 403b increases, thereby increasing the preload force between the second helical body 403b and the first helical block 432, thereby improving the contact between the second helical surface 411b and the second mating surface 432e. When the external force causes the second adjusting member 47a to move away from the second pre-pressing member 45b, the force applied by the second adjusting member 47a to the second pre-pressing member 45b decreases. Consequently, the compression of the second pre-pressing member 45b decreases, and the force applied by the second pre-pressing member 45b to the second spiral 403b decreases, thereby reducing the preload force between the second spiral 403b and the first spiral block 432.

[0270] It is understood that the external force acting on the second adjusting member 47a can be caused by the assembler manually or with the aid of a tool to remove the second adjusting member 47a from the first mounting shaft 44a. The assembler then manually or with the aid of a tool reinstalls the second adjusting member 47a onto the first mounting shaft 44a. The reinstalled second adjusting member 47a is positioned differently along the Y-axis than it was previously on the first mounting shaft 44a. Once the second adjusting member 47a is installed onto the first mounting shaft 44a, the position of the second adjusting member 47a on the first mounting shaft 44a remains unchanged during the normal folding and unfolding of the rotating mechanism 100. In other words, in the absence of an external force, the position of the second adjusting member 47a on the first mounting shaft 44a is fixed.

[0271] The third adjusting member 46b is threadedly connected to the second mounting shaft 44b. When the third adjusting member 46b is rotated, the force applied by the third adjusting member 46b to the third pre-loaded member 45c is adjusted as the third adjusting member 46b moves toward or away from the third pre-loaded member 45c on the second mounting shaft 44b, thereby adjusting the preloaded force provided by the third pre-loaded member 45c to the third swing arm 42a. Specifically, when the third adjusting member 46b is rotated to move toward the third pre-loaded member 45c, the third adjusting member 46b pushes the third pre-loaded member 45c, causing the third pre-loaded member 45c to be compressed more, thereby increasing the force applied to the third spiral 423a of the third swing arm 42a. This increases the preloaded force between the third spiral 423a and the second spiral block 433, thereby improving the contact between the third spiral surface 431A and the third mating surface 433e.

[0272] When the third adjusting member 46b is rotated to move it 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 of the third pre-compression member 45c decreases, and the preload force between the third spiral 423a and the second spiral block 433 decreases. The forces exerted on the third swinging member 421a, the fourth swinging member 421b, and the fourth spiral 423b also decrease simultaneously, the compression of the fourth pre-compression member 45d decreases, and the preload force between the fourth spiral 423b and the second spiral block 433 decreases.

[0273] The fourth adjustment member 47b is a retaining spring. Under the action of an external force, the position of the fourth adjustment member 47b engaged on the second mounting shaft 44b can be changed, thereby adjusting the force applied by the fourth adjustment member 47b to the fourth preload member 45d, ultimately adjusting the preload force applied by the fourth preload member 45d to the fourth swing arm 42b. Specifically, when the fourth adjustment member 47b is moved toward the fourth preload member 45d under the action of an external force, the force applied by the fourth adjustment member 47b to the fourth preload member 45d increases. As a result, the compression of the fourth preload member 45d increases, increasing the force applied by the fourth preload member 45d to the fourth helical body 423b. This increases the preload force between the fourth helical body 423b and the second helical block 433, thereby improving the contact between the fourth helical surface 431B and the fourth mating surface 433f. When the fourth adjusting member 47b moves away from the fourth preloading member 45d under the action of an external force, the force applied by the fourth adjusting member 47b to the fourth preloading member 45d decreases. Consequently, the compression of the fourth preloading member 45d decreases, and the force applied by the fourth preloading member 45d to the fourth spiral 423b decreases, thereby reducing the preload force between the fourth spiral 423b and the second spiral block 433.

[0274] It is understood that the external force acting on the fourth adjustment member 47b can be caused by the assembler manually or with the aid of a tool removing the fourth adjustment member 47b from the second mounting shaft 44b. The fourth adjustment member 47b is then reinstalled manually or with the aid of a tool onto the second mounting shaft 44b. The reinstalled fourth adjustment member 47b will be positioned differently along the Y-axis than it was previously on the first mounting shaft 44a. Once the fourth adjustment member 47b is installed onto the second mounting shaft 44b, the position of the fourth adjustment member 47b on the second mounting shaft 44b will not change during the normal folding and unfolding of the rotating mechanism 100. In other words, in the absence of an external force, the position of the fourth adjustment member 47b on the second mounting shaft 44b is fixed.

[0275] The first connecting body 402a of the first swing arm 41a and the second connecting body 402b of the second swing arm 41b extend out of the first mounting groove 23 from one side of the first mounting groove 23. The first swinging body 401a of the first swing arm 41a and the second swinging body 401b of the second swinging arm 41b are located in the first synchronous sliding groove 112 of the first fixed plate 11. The first swinging body 401a and the second swinging body 401b can slide in the first synchronous sliding groove 112.

[0276] 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 slot 23 from the other side of the first mounting slot 23. The third swinging body 421a of the third swing arm 42a and the fourth swinging body 421b of the fourth swing arm 42b are located in the second synchronous sliding slot 122 of the second fixed plate 12. The third swinging body 421a and the fourth swinging body 421b can slide in the second synchronous sliding slot 122.

[0277] In this embodiment, referring to Figures 4, 16, and 17, a portion of the first sliding member 53 is positioned between the first rotating cylinder 512a and the second rotating cylinder 512b, while another portion of the first sliding member 53 is positioned between the third rotating cylinder 522a and the fourth rotating cylinder 522b. A portion of the second sliding member 54 is positioned between the first rotating cylinder 512a and the second rotating cylinder 512b, while another portion of the second sliding member 54 is positioned between the third rotating cylinder 522a and the fourth rotating cylinder 522b. The first concave cam 512c engages with the first mating wheel 532, the second concave cam 512d engages with the second mating wheel 542, the third concave cam 522c engages with the third mating wheel 533, and the fourth concave cam 522d engages with the fourth mating wheel 543. That is, the first protrusion is located within the first mating recess, and the first mating protrusion is located within the first recess; the second protrusion is located within the second mating recess, and the second mating protrusion is located within the second recess; the third protrusion is located within the third mating recess, and the third mating protrusion is located within the third recess; the fourth protrusion is located within the fourth mating recess, and the fourth mating protrusion is located within the fourth recess. The number, distribution, shape, and size of the first to fourth protrusions and the first to fourth mating protrusions are identical. This ensures that the first concave cam 512c, the second concave cam 512d, the third concave cam 522c, and the fourth concave cam 522d, respectively, engage with the first mating wheel 532, the second mating wheel 542, the third mating wheel 533, and the fourth mating wheel 543 with greater stability.

[0278] The first elastic member 551, the third elastic member 553, the fourth elastic member 554, and the second elastic member 552 are arranged in sequence along the X-axis direction, and the first elastic member 551, the third elastic member 553, the fourth elastic member 554, and the second elastic member 552 are all located between the first sliding member 53 and the second sliding member 54. The first elastic member 551, the third elastic member 553, the fourth elastic member 554, and the second elastic member 552 respectively have their ends abutting against the first sliding member 53 and the second sliding member 54.

[0279] The first rotation hole 512e, the second rotation 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 rotation hole 522e, the fourth rotation 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 through the first rotation hole 512e, the first connecting hole 534, the hollow portion of the first elastic member 551, the second connecting hole 544, and the second rotation hole 512f in sequence, with both ends of the first connecting rod 56a fixed to the first mounting hole 231 and the second mounting hole, respectively. The second connecting rod 56b passes through the third rotation hole 522e, the third connecting hole 535, the hollow portion of the second elastic member 552, the fourth connecting hole 545, and the fourth rotation hole 522f in sequence, with its ends fixed to 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 its ends fixed to 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 its ends fixed to the seventh connecting hole 537 and the eighth connecting hole 547, respectively.

[0280] In other words, the first elastic member 551 is sleeved on the first connecting rod 56a, the second elastic member 552 is sleeved on the second connecting rod 56b, the third elastic member 553 is sleeved on the third connecting rod 56c, and the fourth elastic member 554 is sleeved on the fourth connecting rod 56d. The ends of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are pre-compressed by the first sliding member 53 and the second sliding member 54, so that the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 provide a pre-tightening force for the first fixing plate 11 and the second fixing plate 12, so that the first fixing plate 11 and the second fixing plate 12 can be maintained in the unfolded state or the folded state.

[0281] 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 support base 20. The portion of the first connecting rod 56a extending from the first rotating cylinder 512a is fixed within the first fastening hole 242, and the portion of the first connecting rod 56a extending from the second rotating cylinder 512b is fixed within the second fastening hole.

[0282] 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. The first slider 531 and the second slider 541 can both 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 along the Y-axis direction, thereby preventing the first slider 53 and the second slider 54 from shaking when moving along the Y-axis direction, so that the movement of the first slider 53 and the second slider 54 is more stable.

[0283] 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 slide 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 slide groove 114. In other words, a portion of the first guide slider 115 is located between the first sliding arm 514 and the second sliding arm 515, and another portion of the first guide slider 115 is located between the first sliding cylinder 516 and the second sliding cylinder 517. A first connecting shaft passes through the first guide slide groove 116, and its two ends are respectively fixed in the first sliding hole 516a and the second sliding hole 517a. The first connecting shaft can slide and rotate within the first guide slide groove 116, thereby causing the first sliding cylinder 516 and the second sliding cylinder 517 to slide and rotate, thereby achieving sliding and rotation of the first damping swing arm 51 relative to the first fixed plate 11.

[0284] When installing the first connecting shaft, first place the first sliding cylinder 516 and the second sliding cylinder 517 in the first avoidance groove 117, then pass the first connecting shaft from the first avoidance groove 117 through the first sliding hole 516a, the first guide groove 538 and the second sliding hole 517a in sequence, and then move the first sliding cylinder 516 and the second sliding cylinder 517 to be respectively located in the first damping groove 113 and the second damping groove 114.

[0285] 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 slot 123, while at least a portion of the fourth sliding arm 525 and the fourth sliding cylinder 527 are located within the fourth damping slot 124. In other words, a portion of the second guide slider 125 is located between the third and fourth sliding arms 524, 525, while another portion of the second guide slider 125 is located between the third and fourth sliding cylinders 526, 527. A second connecting shaft passes through the second guide slot 126, with its ends fixed in the third sliding hole 526a and the fourth sliding hole 527a, respectively. The second connecting shaft can slide and rotate within the second guide slot 126, causing the third and fourth sliding cylinders 526, 527 to slide and rotate, thereby enabling the second damping swing arm 52 to slide and rotate relative to the second fixed plate 12.

[0286] When installing the second connecting shaft, first make the third sliding cylinder 526 and the fourth sliding cylinder 527 located in the second avoidance groove 127, then pass the second connecting shaft from the second avoidance groove 127 through the third sliding hole 526a, the second guide groove 548 and the fourth sliding hole 527a in sequence, and then move the third sliding cylinder 526 and the fourth sliding cylinder 527 to be located in the third damping groove 123 and the fourth damping groove 124 respectively.

[0287] In this embodiment, when the rotating mechanism 100 is in the deployed state, the angle between the first fixing plate 11 and the second fixing plate 12 is 180 degrees (including the tolerance range), and the angle between the first main swing arm 31 and the second main swing arm 32 is 180 degrees (including the tolerance range). The angle between the first synchronous swing arm 41 and the second synchronous swing arm 42 is 180 degrees (including the 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 the tolerance range).

[0288] 22 and 23 , FIG. 22 is a structural schematic diagram of the rotating mechanism 100 shown in FIG. 4 switching from an unfolded state to a folded state, and FIG. 23 is a partial cross-sectional view of the rotating mechanism 100 shown in FIG. 22 .

[0289] When the rotating mechanism 100 switches from the unfolded state to the folded state, the first fixed plate 11 rotates counterclockwise relative to the supporting base 20. The first main sliding member 312 of the first main swing arm 31 slides and rotates counterclockwise within the first main slot 21, while the first main rotating member 311 of the first main swing arm 31 rotates counterclockwise around the first fixed axis 33. The first swinging member 401a of the first swing arm 41a and the second swinging member 401b of the second swing arm 41b slide and rotate counterclockwise within the first synchronization slot 112. The first spiral member 403a of the first swing arm 41a and the second spiral member 403b of the second swing arm 41b rotate counterclockwise around the first mounting axis 44a. As the first spiral member 403a rotates, the first spiral surface 411a gradually pushes against the first mating surface 432e, causing the synchronization slider 43 to slide along the guide bar 233 in the negative direction of the Y-axis. At this time, the first spiral block 432 gradually slides out of the first spiral opening of the first spiral member 403a. During the rotation of the second spiral body 403b, the second matching surface 432f slides along the second spiral surface 411b, and the first spiral block 432 gradually slides into the second spiral opening.

[0290] As the synchronous slider 43 slides in the negative direction of the Y-axis, 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 of 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 swinging body 421a of the third swing arm 42a and the fourth swinging body 421b of the fourth swing arm 42b slide and rotate clockwise within the second synchronous slot 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.

[0291] The first sliding body 511 of the first damping swing arm 51 rotates counterclockwise around the first connecting shaft. Simultaneously, the first connecting shaft slides within the first guide groove 116, driving 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, causing the first protrusion to gradually move out of the first mating recess, and the second protrusion to gradually move 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 direction 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 approach each other, the first slider 531 and the second slider 541 approach each other, and the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are synchronously compressed at both ends, thereby providing damping force for the first fixed plate 11.

[0292] When the rotating mechanism 100 switches from the unfolded state to the folded state, the second fixed plate 12 rotates clockwise relative to the supporting base 20. The second main sliding member 322 of the second main swing arm 32 slides and rotates clockwise within the second main slot 22, while the second main rotating member 321 of the second main swing arm 32 rotates clockwise around the second fixed axis 34. The third swinging member 421a of the third swing arm 42a and the fourth swinging member 421b of the fourth swing arm 42b slide and rotate clockwise within the second synchronization slot 122. The third spiral 423a of the third swing arm 42a and the fourth spiral 423b of the fourth swing arm 42b rotate clockwise around the second mounting axis 44b. As the third spiral 423a rotates, the third helical surface 431A gradually pushes against the third mating surface 433e, causing the synchronization slider 43 to slide along the guide bar 233 in the negative direction of the Y axis. As the fourth spiral 423b rotates, the fourth mating surface 433f slides along the fourth helical 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.

[0293] As 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, causing the first mating surface 432e of the first helical block 432 to slide along the first helical surface 411a of the first helical body 403a. The first helical block 432 gradually slides out of the first helical opening of the first helical body 403a and gradually slides into the second helical opening. The first swinging member 401a of the first swing arm 41a and the second swinging member 401b of the second swing arm 41b slide and rotate counterclockwise within the first synchronous slot 112. 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 fixed plate 11 to rotate counterclockwise, causing the first and second fixed plates 11 and 12 to fold synchronously.

[0294] The first swinging member 401a is connected to the second swinging member 401b, so that the first swing arm 41a and the second swing arm 41b move synchronously. The third swinging member 421a is connected to the fourth swinging member 421b, so that the third swing arm 42a and the fourth swing arm 42b move synchronously. The first spiral block 432 of the synchronous slider 43 is connected to the first spiral 403a and the second spiral 403b, respectively. The second spiral block 433 of the synchronous slider 43 cooperates with the third spiral 423a and the fourth spiral 423b, respectively, so that the first synchronous swing arm 41 and the second synchronous swing arm 42 can rotate simultaneously, thereby achieving synchronization of the movement of the first fixed plate 11 and the second fixed plate 12, and ensuring synchronization of the movement of the first shell and the second shell.

[0295] The second sliding body 521 of the second damping swing arm 52 rotates counterclockwise around the second connecting shaft. Simultaneously, the second connecting shaft slides within the second guide groove 126, driving 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, causing the third protrusion to gradually move out of the third mating recess, and the fourth protrusion to gradually move 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 direction 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 approach each other, the first slider 531 and the second slider 541 approach each other, and the two ends of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are synchronously compressed, thereby providing damping force for the second fixed plate 12.

[0296] 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, driven by the first damping swing arm 51 and the second damping swing arm 52, slide toward each other. 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 compressed. During the gradual compression of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554, they can provide a damping force for the first fixed plate 11 and the second fixed plate 12, thereby providing a damping feel to the user. This damping force is twice that of an elastic member compressed at one end, resulting in a better damping feel.

[0297] 24 and 25 , FIG. 24 is a schematic structural diagram of the rotating mechanism 100 shown in FIG. 4 in a folded state, and FIG. 25 is a partial cross-sectional view of the rotating mechanism 100 shown in FIG. 23 .

[0298] 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 first protrusion of the first concave cam 512c abuts the end of the first mating protrusion of the first mating wheel 532. The second protrusion of the second concave cam 512d abuts the end of the second mating protrusion of the second mating wheel 542. The third protrusion of the third concave cam 522c abuts the end of the third mating protrusion of the third mating wheel 533. The fourth protrusion of the fourth concave cam 522d abuts the end of the fourth mating protrusion of the fourth mating wheel 543. One end of the synchronous slider 43 along the Y-axis is offset from the first spiral 403a of the first swing arm 41a and the third spiral 423a of the third swing arm 42a. One end of the synchronous slider 43 is aligned with the middle areas of the first spiral 403a of the first swing arm 41a and the third spiral 423a of the third swing arm 42a. The other end of the synchronous slider 43 along the Y-axis is offset from the second spiral 403b of the second swing arm 41b and the fourth spiral 423b of the fourth swing arm 42b. The other end of the synchronous slider 43 is aligned with the first connecting block 434 and the second connecting block 435.

[0299] When the rotating mechanism 100 switches from the folded state to the unfolded state, the first fixed plate 11 rotates clockwise relative to the supporting base 20. The first main sliding member 312 of the first main swing arm 31 slides and rotates clockwise within the first main slot 21, while the first main rotating member 311 of the first main swing arm 31 rotates clockwise around the first fixed axis 33. The first swinging member 401a of the first swing arm 41a and the second swinging member 401b of the second swing arm 41b slide and rotate clockwise within the first synchronization slot 112. The first spiral member 403a of the first swing arm 41a and the second spiral member 403b of the second swing arm 41b rotate clockwise around the first mounting axis 44a. As the second spiral member 403b rotates, the second spiral surface 411b gradually pushes against the second mating surface 432f, causing the synchronization slider 43 to slide along the guide bar 233 in the positive direction of the Y-axis. As the first spiral member 403a rotates, 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 the first spiral block 432 gradually slides into the first spiral opening of the first spiral body 403a.

[0300] 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 of the fourth helical opening and slides back 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 swinging body 421a of the third swing arm 42a and the fourth swinging body 421b of the fourth swing arm 42b slide and rotate counterclockwise within the second synchronous slot 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.

[0301] The first sliding body 511 of the first damping swing arm 51 rotates clockwise around the first connecting shaft. Simultaneously, the first connecting shaft slides within the first guide slot 116, driving the first sliding body 511 to slide within the first guide slot 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, 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 point, 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 ends of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are simultaneously released, thereby providing a damping force for the first fixed plate 11.

[0302] When the rotating mechanism 100 switches from the folded state to the unfolded state, the second fixed plate 12 rotates counterclockwise relative to the supporting base 20. The second main sliding member 322 of the second main swing arm 32 slides and rotates counterclockwise within the second main slot 22, while the second main rotating member 321 of the second main swing arm 32 rotates counterclockwise around the second fixed axis 34. The third swinging member 421a of the third swing arm 42a and the fourth swinging member 421b of the fourth swing arm 42b slide and rotate counterclockwise within the second synchronization slot 122. The third spiral 423a of the third swing arm 42a and the fourth spiral 423b of the fourth swing arm 42b rotate counterclockwise around the second mounting axis 44b. As the third spiral 423a rotates, the fourth helical surface 431B gradually pushes against the fourth mating surface 433f, causing the synchronization slider 43 to slide along the guide bar 233 in the positive direction of the Y axis. At this time, as the fourth spiral 423b rotates, the third helical 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.

[0303] When 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 the first helical surface 411, and the second mating surface 432f slides along the second helical surface 411b. The first spiral block 432 gradually slides out from the second spiral opening of the second spiral body 403b and gradually slides into the first spiral opening of the first spiral body 403a. The first swinging body 401a of the first swing arm 41a and the second swinging body 401b of the second swing arm 41b slide and rotate clockwise in the first synchronous sliding groove 112. 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. This in turn drives the first fixed plate 11 to rotate clockwise, causing the first fixed plate 11 and the second fixed plate 12 to fold synchronously.

[0304] The first swinging member 401a is connected to the second swinging member 401b, so that the first swing arm 41a and the second swing arm 41b move synchronously. The third swinging member 421a is connected to the fourth swinging member 421b, so that the third swing arm 42a and the fourth swing arm 42b move synchronously. The first spiral block 432 of the synchronous slider 43 is connected to the first spiral 403a and the second spiral 403b, respectively. The second spiral block 433 of the synchronous slider 43 cooperates with the third spiral 423a and the fourth spiral 423b, respectively, so that the first synchronous swing arm 41 and the second synchronous swing arm 42 can rotate simultaneously, thereby achieving synchronization of the movement of the first fixed plate 11 and the second fixed plate 12, and ensuring synchronization of the movement of the first shell and the second shell.

[0305] The second sliding body 521 of the second damping swing arm 52 rotates counterclockwise around the second connecting shaft. Simultaneously, the second connecting shaft slides within the second guide groove 126, driving 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 point, 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 ends of the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are simultaneously released, thereby providing a damping force for the second fixed plate 12.

[0306] 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 drive 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, they can provide a damping force for the first fixed plate 11 and the second fixed plate 12, thereby providing a damping feel to the user. This damping force is twice that of an elastic member with only one end released, resulting in a better damping feel.

[0307] In this embodiment, in the synchronization assembly 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 and second swing arms 41a, 41b are connected by a trapezoidal structure, ensuring a secure connection between the first and second swing arms 41a, 41b. In other words, when assembled, the first and second swing arms 41a, 41b are detachably connected. When unassembled, the first and second swing arms 41a, 41b are separated. Therefore, the first and second swing arms 41a, 41b can be machined independently. The lengthwise dimensions of the first and second swing arms 41a, 41b along the rotating mechanism are smaller than those of a single-piece swing arm. This reduces the machining difficulty, improves efficiency, and reduces costs. In particular, the separation of the first and second swing arms 41a, 41b allows for machining using a mold, significantly improving efficiency and precision compared to traditional CNC machining methods.

[0308] Specifically, in the first swing arm 41a, the first through hole 406a of the first spiral 403a extends through the first spiral 403a along the Y-axis. The first through hole 406a is a circular hole with a consistent diameter along the Y-axis. In other words, the curvature of the first inner circumferential surface 407a along the Y-axis is consistent, without any localized protrusions or depressions. Thus, the first through hole 406a can be machined using a mold, enabling the first spiral 403a to be machined using a mold. During mold machining, the mold can be removed along the Y-axis.

[0309] In the second swing arm 41b, the second through hole 406b of the second spiral 403b extends through the first spiral 403a along the Y-axis. This circular hole 406b maintains a consistent diameter along the Y-axis. In other words, the curvature of the second inner circumferential surface 407b remains consistent along the Y-axis, without any localized protrusions or depressions. Therefore, the second through hole 406b can be machined using a mold, enabling the second spiral 403b to be machined using a mold. During mold machining, the mold can be removed along the Y-axis.

[0310] In the synchronization assembly 40, the second synchronization swing arm 42 is divided into a third swing arm 42a and a fourth swing arm 42b. These arms are connected by a trapezoidal structure, ensuring a secure connection between the third and fourth swing arms 42a, 42b. In other words, when assembled, the third and fourth swing arms 42a, 42b are detachably connected. When unassembled, the third and fourth swing arms 42a, 42b are separated. Therefore, the third and fourth swing arms 42a, 42b can be machined independently. Compared to a single-piece swing arm, the length of the rotation mechanism is reduced for the third and fourth swing arms 42a, 42b. This reduces the machining difficulty, improves efficiency, and reduces costs. In particular, the separation of the third and fourth swing arms 42a, 42b allows for mold processing, significantly improving efficiency and precision compared to traditional CNC machining methods.

[0311] Specifically, in the third swing arm 42a, the third through hole 426a of the third spiral 423a extends through the first spiral 403a along the Y-axis. This circular hole 426a maintains a consistent diameter along the Y-axis. In other words, the curvature of the third inner circumferential surface 427a remains consistent along the Y-axis, without any localized protrusions or depressions. This allows the third through hole 426a to be machined using a mold, enabling the third spiral 423a to be machined using a mold. During mold machining, the mold can be removed along the Y-axis.

[0312] In the fourth swing arm 42b, the fourth through hole 426b of the fourth spiral 423b extends through the first spiral 403a along the Y-axis. This circular hole 426b maintains a consistent diameter along the Y-axis. In other words, the curvature of the fourth inner circumferential surface 427b remains consistent along the Y-axis, without any localized protrusions or depressions. This allows the fourth through hole 426b to be machined using a mold, enabling the fourth spiral 423b to be machined using a mold. During mold machining, the mold can be removed along the Y-axis.

[0313] That is, the first synchronous swing arm 41 and the second synchronous swing arm 42 can be machined using a mold. However, the traditional integrated swing arm solution cannot be machined in the Y-axis direction due to the presence of a spiral structure, and can only be machined using CNC. However, CNC machining is expensive, inefficient, and has poor precision. The structure of the present application can be machined using a mold, reducing costs, improving machining efficiency, and achieving higher precision.

[0314] In this embodiment, the first and second spiral blocks 432, 433 of the synchronous slider 43 can also be machined using a mold. Specifically, the portion of the first inner wall surface 432c that forms the wall surface 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 portion of the first inner wall surface 432c that forms the wall surface of the first through-hole 432a and the remaining portion of the first inner wall surface 432c have the same curvature along the X-axis. In other words, the first through-hole 432a is a circular hole with a constant diameter. Therefore, when machining the first through-hole 432a using a mold, the mold can be removed along the Y-axis, allowing the first through-hole 432a to be machined simultaneously with the first through-hole 432a. The second mating surface 432f is flush with the wall surface of the first demolding groove in the Z-axis direction. When machining the second mating surface 432f using the mold, the mold can be removed along the Z-axis, allowing the second mating surface 432f to be machined using the mold. Thus, the first spiral block 432 can be manufactured using a mold.

[0315] The portion of the second inner wall surface 433c that forms the hole wall surface of the second through hole 433a and the remaining portion of the second inner wall surface 433c are connected in the Y-axis direction. The portion of the second inner wall surface 433c that forms the hole wall surface of the second through hole 433a and the remaining portion of the second inner wall surface 433c have the same curvature along the X-axis direction. In other words, the second through hole 433a is a circular hole with a constant aperture. As a result, when the second through hole 433a is processed using a mold, the mold can be ejected along the Y-axis direction, achieving the second through hole 433a being processed using the mold, and the third mating surface 433e can be processed 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 the fourth mating surface 433f is processed using a mold, the mold can be ejected along the Z-axis direction, achieving the fourth mating surface 433f being processed using the mold. As a result, the second spiral block 433 can be manufactured using a mold.

[0316] In summary, it can be seen that 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 synchronization slider 43 of the present application can be processed using molds, which reduces costs, improves processing efficiency, and has higher precision.

[0317] In this embodiment, the strokes of the first sliding member 53 and the second sliding member 54 in squeezing the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are specifically as follows: Assuming that the heights from the first protrusion to the fourth protrusion and from the first mating protrusion to the fourth mating protrusion along the Y-axis direction are both 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 sliding member 531 facing away from the first concave cam 512c and the surface of the second sliding member 541 facing away from the third concave cam 522c is V.

[0318] 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 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 facing away from the first concave cam 512c and the surface of the second slider 541 facing away from the third concave cam 522c is W, and W = VU. In other words, the first slider 53 moves a distance U in the negative direction of the Y axis, and the second slider 54 moves a distance U in the positive direction of the Y axis.

[0319] The lengths of the first and second elastic members 551, 552 before compression are both 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. The lengths of the first and second elastic members 551, 552 after compression are both 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 compressed strokes at both ends of the first elastic member 551 and the second elastic member 552 are both U, respectively.

[0320] Similarly, when the rotating mechanism 100 switches from the folded state to the unfolded state, the synchronous rebound strokes of both ends of the first elastic member 551 are both U, and the synchronous rebound strokes of both ends of the second elastic member 552 are both U.

[0321] As can be seen from the above, 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 compressed or released synchronously. Compared with the solution in which only one end of the elastic member is compressed or released, 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 compressed or released synchronously, which can provide double the damping force.

[0322] Furthermore, the first elastic member 551, the second elastic member 552, the third elastic member 553, and the fourth elastic member 554 are compressed simultaneously. Compared to a solution where only one end of the elastic member is compressed, the height U along the Y-axis from the first protrusion to the fourth protrusion and from the first mating protrusion to the fourth mating protrusion can be set to be smaller, specifically half that of a solution where only one end is compressed. This smaller height reduces wear on the first protrusion to the fourth protrusion and from the first mating protrusion to the fourth mating protrusion, thereby extending the lifespan of the first protrusion to the fourth protrusion and from the first mating protrusion to the fourth mating protrusion, and further extending the lifespan of the first concave cam 512c to the fourth concave cam 522d and from the first mating wheel 532 to the fourth mating wheel 543.

[0323] The above are only some of the embodiments and implementations of this application. The scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A rotating mechanism, characterized in that: include: A first fixing plate, a second fixing plate, a bearing base, a first synchronous swing arm and a second synchronous swing arm; The first fixing plate and the second fixing 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 respectively rotatably connected to the bearing base; the first synchronous swing arm is slidably and rotatably connected to the first fixing plate, and the second synchronous swing arm is slidably and rotatably connected to the second fixing plate; The first synchronous swing arm includes a first swing arm and a second swing arm, and the first swing arm is detachably connected to the second swing arm; the first swing arm includes a first swinging body, a first connecting body and a first spiral body connected in sequence along the width direction of the rotating mechanism; the first swinging body is slidably and rotatably connected to the first fixed plate; the first spiral body is rotatably connected to the supporting base; the second swing arm includes a second swinging body, a second connecting body and a second spiral body connected in sequence along the width direction of the rotating mechanism; the second swinging body is slidably and rotatably connected to the second fixed plate, and the second spiral body is rotatably connected to the supporting base.

2. The rotation mechanism according to claim 1, characterized in that: The rotating mechanism further includes a first mounting shaft, wherein the first mounting shaft is fixedly connected to the bearing base; The first spiral body is provided with a first through hole and a first spiral surface, the axial direction of the first through hole is parallel to the length direction of the rotating mechanism; the first spiral surface extends spirally around the axial direction of the first through hole; the first mounting axis passes through the first through hole; the first spiral body can rotate around the first mounting axis.

3. The rotation mechanism according to claim 2, characterized in that: The first through hole is a circular hole, and sizes of the first through hole along the length direction of the rotating mechanism are all equal.

4. The rotation mechanism according to claim 2, characterized in that: The first spiral body includes a first inner circumferential surface, a first outer circumferential surface and a first end wall surface; the first inner circumferential surface is the hole wall surface of the first through hole, and the first outer circumferential surface is away from the first inner circumferential surface; the first end wall surface is connected between the first inner circumferential surface and the first outer circumferential surface, and the first through hole passes through the first end wall surface; the opposite sides of the first spiral surface are respectively connected to the first inner circumferential surface and the first outer circumferential surface, and one end of the first spiral surface is connected to the first end wall surface.

5. The rotation mechanism according to claim 2, characterized in that: The rotating mechanism further includes a synchronous slider; the synchronous slider is slidably mounted on the bearing base; the synchronous slider is provided with a first mating surface, which is a helical surface; the first helical surface abuts against the first mating surface.

6. The rotating mechanism according to claim 5, characterized in that: The synchronous slider comprises a synchronous body and a first spiral block which are fixedly connected. The synchronous body is slidably mounted on the bearing base. The first spiral block is provided with a first through hole and the 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, and the first mounting shaft also passes through the first through hole. The first mating surface extends in an axial spiral around the first through hole. The first spiral block can slide along the first mounting shaft.

7. The rotation mechanism according to claim 6, characterized in that: The first spiral block is further provided with a second mating surface, which is a spiral surface; the second mating surface and the first mating surface are located on opposite sides of the first through hole, and the second mating surface extends spirally around the axial direction of the first through hole; The second spiral body is provided with a second through hole and a second spiral 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. The second spiral body can rotate around the first mounting shaft; the second spiral surface extends spirally around the axial direction of the second through hole; and the second spiral surface abuts the second mating surface.

8. The rotation mechanism according to claim 7, characterized in that: 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 serves as a hole wall surface of the first through hole, and the first outer wall surface faces away from 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 in a direction 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 in a direction away from the second connecting surface and is connected to the synchronization body.

9. The rotation mechanism according to claim 8, characterized in that: The first inner wall surface has the same arc angle in the longitudinal direction of the rotating mechanism.

10. The rotating mechanism according to claim 7, characterized in that: The synchronous body is provided with a first ejection groove, which penetrates the synchronous 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 surface of the first ejection groove.

11. The rotating mechanism according to claim 7, characterized in that: The supporting base is provided with a first mounting groove, 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, and the two ends of the first mounting shaft are respectively fixedly connected to the two opposite groove walls of the first mounting groove.

12. The rotating mechanism according to claim 11, characterized in that: The synchronous slider further includes a first connecting block, the first connecting block being fixedly connected to the synchronous body and being 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, the first through hole being coaxial with the first through hole, and the first mounting shaft also passing through the first through hole; The rotating mechanism also includes a first pre-pressed part and a second pre-pressed part; the first pre-pressed part and the second pre-pressed part are both sleeved on the first mounting shaft; the first pre-pressed part is located between the first spiral body and the groove wall of the first mounting groove to provide a pre-tightening force for the fit between the first spiral surface and the first mating surface; the second pre-pressed part is located between the first spiral body and the first connecting block to provide a pre-tightening force for the fit between the second spiral surface and the second mating surface.

13. The rotating mechanism according to claim 12, 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 surface of the first mounting groove and the first pre-pressing 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 pre-pressed member; when the first adjusting member moves toward the first pre-pressed member, the force applied to the first pre-pressed member by the first adjusting member increases, and the pre-tightening force provided by the first pre-pressed member increases; when the first adjusting member moves away from the first pre-pressed member, the force applied to the first pre-pressed member by the first adjusting member decreases, and the pre-tightening force provided by the first pre-pressed member decreases.

14. The rotation mechanism according to claim 12, 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-pressing 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 pre-pressed member; when the second adjusting member moves toward the second pre-pressed member, the force applied by the second adjusting member to the second pre-pressed member increases, and the pre-tightening force provided by the second pre-pressed member increases; when the second adjusting member moves away from the second pre-pressed member, the force applied by the second adjusting member to the second pre-pressed member decreases, so that the pre-tightening force provided by the second pre-pressed member decreases.

15. The rotating mechanism according to claim 7, characterized in that: The second through hole is a circular hole, and the sizes of the second through hole along the length direction of the rotating mechanism are equal.

16. The rotating mechanism according to claim 7, characterized in that: The second spiral body includes a second inner peripheral surface, a second outer peripheral surface and a second end wall surface; The second inner circumferential surface is the hole wall surface of the second through hole, and the second outer circumferential surface is away from the second inner circumferential surface; the second end wall surface is connected between the second inner circumferential surface and the second outer circumferential surface, and the second through hole passes through the second end wall surface; the opposite sides of the second spiral surface are respectively connected to the second inner circumferential surface and the second outer circumferential surface, and one end of the second spiral surface is connected to the second end wall surface.

17. The rotating mechanism according to any one of claims 1 to 16, characterized in that: One of the first swinging body and the second swinging body is provided with a clamping groove, and the other of the first swinging body and the second swinging body is provided with a clamping block; the clamping block is clamped in the clamping groove.

18. The rotation mechanism according to claim 17, characterized in that: One side of the first swing arm is provided with a first clamping groove and a first clamping block arranged alternately; one side of the second swing arm is provided with a second clamping groove and a second clamping block arranged alternately; the first clamping block is clamped in the second clamping groove, and the second clamping block is clamped in the first clamping groove.

19. The rotating mechanism according to claim 18, characterized in that: The first clamping block and the first clamping slot are both trapezoidal in shape, the long bottom side of the first clamping block is aligned with the opening of the first clamping slot, and the short bottom side of the first clamping block is aligned with the bottom surface of the first clamping slot; The second clamping block and the second clamping slot are both trapezoidal in shape, the long bottom side of the second clamping block is aligned with the opening of the second clamping slot, and the short bottom side of the second clamping block is aligned with the bottom surface of the second clamping slot.

20. The rotating mechanism according to any one of claims 1 to 16, characterized in that: The second synchronous swing arm includes a third swing arm and a fourth swing arm, and the third swing arm and the fourth swing arm are detachably connected; The third swing arm includes a third swinging body, a third connecting body and a third spiral body connected in sequence along the width direction of the rotating mechanism; the third swinging body is slidably and rotatably connected to the second fixed plate, and the third spiral body is rotatably connected to the supporting base; the fourth swing arm includes a fourth swinging body, a fourth connecting body and a fourth spiral body connected in sequence along the width direction of the rotating mechanism; the fourth swinging body is slidably and rotatably connected to the second fixed plate, and the fourth spiral body is rotatably connected to the supporting base.

21. The rotating mechanism according to claim 20, characterized in that: The rotating mechanism further includes a second mounting shaft, the second mounting shaft being fixedly connected to the bearing base; The third spiral body is provided with a third through hole and a third spiral surface, and the axial direction of the third through hole is parallel to the rotating machine. the third helical surface extends in an axial direction of the spiral around the third through hole; the second mounting shaft passes through the third through hole, and the third helix is ​​capable of rotating around the second mounting shaft.

22. The rotating mechanism according to claim 21, characterized in that: The third through hole is a circular hole, and the sizes of the third through hole along the length direction of the rotating mechanism are all equal.

23. The rotating mechanism according to claim 21, characterized in that: The third spiral body includes a third inner peripheral surface, a third outer peripheral surface and a third end wall surface; The third inner circumferential surface is the hole wall surface of the third through hole, and the third outer circumferential surface is away from the third inner circumferential surface; the third end wall surface is connected between the third inner circumferential surface and the third outer circumferential surface, and the third through hole passes through the third end wall surface; the opposite sides of the third spiral surface are respectively connected to the third inner circumferential surface and the third outer circumferential surface, and one end of the third spiral surface is connected to the third end wall surface.

24. The rotating mechanism according to claim 21, wherein: The rotating mechanism further includes a synchronous slider; the synchronous slider is slidably mounted on the bearing base; the synchronous slider is provided with a third mating surface, the third mating surface is a helical surface, and the third helical surface abuts against the third mating surface.

25. The rotating mechanism according to claim 24, characterized in that: The synchronous slider comprises a fixedly connected synchronous body and a second spiral block, wherein the synchronous body is slidably mounted on the bearing base; the second spiral block is provided with a second through hole and the third mating surface; The second through hole passes through the second spiral block along the length direction of the rotating mechanism, the second through hole is coaxial with the third through hole, and the second mounting shaft also passes through the second through hole; the third mating surface extends in an axial spiral around the second through hole; the second spiral block can slide along the second mounting shaft.

26. The rotating mechanism according to claim 25, characterized in that: The second spiral block is further provided with a fourth mating surface, which is a spiral surface. The fourth mating surface and the third mating surface are located on opposite sides of the second through hole, and the fourth mating surface extends spirally around the axial direction of the second through hole. The fourth helical body is provided with 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 is coaxial with the third through hole. 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 axial direction of the fourth through hole; and the third helical surface abuts the third mating surface.

27. The rotating mechanism according to claim 26, characterized in that: 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 serves as a hole wall surface of the second through hole, and the second outer wall surface faces away from 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 in a direction 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 in a direction away from the fourth connecting surface and is connected to the synchronization body.

28. The rotating mechanism according to claim 27, characterized in that: The arcs of the second inner wall surfaces in the longitudinal direction of the rotating mechanism are equal.

29. The rotating mechanism according to claim 26, wherein: The synchronous body is provided with a second ejection groove which penetrates the synchronous 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 surface of the second ejection groove.

30. The rotating mechanism according to claim 26, wherein: The fourth through hole is a circular hole, and the sizes of the fourth through hole along the length direction of the rotating mechanism are equal.

31. The rotating mechanism according to claim 26, wherein: The supporting 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 installed 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.

32. The rotating mechanism according to claim 31, characterized in that: The synchronous slider further includes a second connecting block, the second connecting block and the second spiral block being located on the same side of the synchronous slider; the second connecting block is provided with a second through hole, the second through hole being coaxial with the third through hole, and the second mounting shaft also passes through the second through hole; The rotating mechanism also includes a third pre-pressed part and a fourth pre-pressed part; the third pre-pressed part and the fourth pre-pressed part are both sleeved on the second mounting shaft; the third pre-pressed part is located between the third helical body and the groove wall surface of the first mounting groove to provide a pre-tightening force for the fit between the third helical surface and the third mating surface; the fourth pre-pressed part is located between the third helical body and the second connecting block to provide a pre-tightening force for the fit between the fourth helical surface and the fourth mating surface.

33. The rotating mechanism according to claim 32, characterized in that: The rotating mechanism further includes a third adjusting member, which is sleeved on the second mounting shaft; the third adjusting member is located between the groove wall surface of the first mounting groove and the third pre-pressing member; The axial position of the third adjusting part in the second mounting shaft can be adjusted so that the third adjusting part moves toward or away from the third preload part; when the third adjusting part moves toward the third preload part, the force applied by the third adjusting part to the third preload part increases, and the preload force provided by the third preload part increases; when the third adjusting part moves away from the third preload part, the force applied by the third adjusting part to the third preload part decreases, and the preload force provided by the third preload part decreases.

34. The rotating mechanism according to claim 32, wherein: The rotating mechanism further includes a fourth adjusting member, which is sleeved on the second mounting shaft; the fourth adjusting member is located between the second connecting block and the fourth pre-pressing member; The axial position of the fourth adjusting part in the second mounting shaft can be adjusted so that the fourth adjusting part moves toward or away from the fourth preloading part; when the fourth adjusting part moves toward the fourth preloading part, the force applied by the fourth adjusting part to the fourth preloading part increases, and the preload force provided by the fourth preloading part increases; when the fourth adjusting part moves away from the fourth preloading part, the force applied by the fourth adjusting part to the fourth preloading part decreases, and the preload force provided by the fourth preloading part decreases.

35. The rotating mechanism according to claim 26, characterized in that: The fourth through hole is a circular hole, and the sizes of the fourth through hole along the length direction of the rotating mechanism are equal.

36. The rotating mechanism according to claim 26, wherein: The fourth spiral body includes a fourth inner peripheral surface, a fourth outer peripheral surface and a fourth end wall surface; The fourth inner circumferential surface is the hole wall surface of the fourth through hole, and the fourth outer circumferential surface is away from the fourth inner circumferential surface; the fourth end wall surface is connected between the fourth inner circumferential surface and the fourth outer circumferential surface, and the fourth through hole passes through 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 synchronous body and the fourth end wall surface.

37. The rotating mechanism according to claim 20, characterized in that: One of the third spiral and the fourth spiral is provided with a clamping groove, and the other of the third spiral and the fourth spiral is provided with a clamping block; the clamping block is clamped in the clamping groove.

38. The rotating mechanism according to claim 37, characterized in that: One side of the third swing arm is provided with a third clamping slot and a third clamping block arranged alternately, and one side of the fourth swing arm is provided with a fourth clamping slot and a fourth clamping block arranged alternately; the third clamping block is clamped in the fourth clamping slot, and the fourth clamping block is clamped in the third clamping slot.

39. The rotating mechanism according to claim 38, characterized in that: The third clamping block and the third clamping slot are both trapezoidal in shape, the long bottom side of the third clamping block is aligned with the opening of the third clamping slot, and the short bottom side of the third clamping block is aligned with the bottom surface of the third clamping slot; The fourth clamping block and the fourth clamping slot are both trapezoidal in shape, the long bottom side of the fourth clamping block is aligned with the opening of the fourth clamping slot, and the short bottom side of the fourth clamping block is aligned with the bottom surface of the fourth clamping slot.

40. The rotating mechanism according to any one of claims 1 to 16, characterized in that: 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 supporting 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 to move closer to or 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.

41. The rotating mechanism according to claim 40, characterized in that: 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 an end of the first rotating cylinder; the second concave cam is fixedly connected to an end of the second rotating cylinder; the first concave cam and the second concave cam are spaced apart and opposite to each other; the first rotating cylinder and the second rotating cylinder are both rotatably connected to the first connecting rod; The first sliding member includes a first slider and a first mating wheel that are fixedly connected, and the second sliding member includes a second slider and a second mating wheel that are fixedly connected; the first slider and the second slider are both slidably connected to the first connecting rod; the first concave cam engages the first mating wheel, and the second concave cam engages the second mating wheel; the first elastic member abuts between the first slider and the second slider.

42. The rotating mechanism according to claim 40, characterized in that: 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 being arranged at intervals along the length direction of the rotating mechanism; The first fixing plate is provided with a first damping chute and a second damping chute, the first damping chute and the second damping chute are arranged at intervals along the length direction of the rotating mechanism, a first guide slide block is provided between the first damping chute and the second damping chute, the first guide slide block is provided with a first guide groove, and the first guide groove is respectively connected to the first damping chute and the second damping chute; The first guide sliding block is located in the gap between the first sliding cylinder and the second sliding cylinder, the first sliding cylinder is located in the first damping sliding groove, and the second sliding cylinder is located in the damping sliding groove; the first connecting shaft passes through the first sliding cylinder, the first guide sliding groove and the second sliding cylinder, and the first connecting shaft can slide and rotate in the first guide sliding groove.

43. The rotation mechanism according to claim 41, characterized in that: 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 fixing plate, and the other side of the second damping swing arm is rotatably connected to the second connecting rod; the first sliding member is slidably connected to the second connecting rod, and the second sliding member is slidably connected to the second connecting rod; the second elastic member is sleeved on the second connecting rod and is located between the first sliding member and the second sliding member; When the second fixed plate rotates relative to the supporting 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 to move closer to or 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.

44. The rotation mechanism according to claim 43, characterized in that: 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 an end of the third rotating cylinder; the fourth concave cam is fixedly connected to an end of the fourth rotating cylinder; the third concave cam and the fourth concave cam are spaced apart and opposite to each other; the third rotating cylinder and the fourth rotating cylinder are both rotatably connected to the second connecting rod; The first sliding member also includes a third mating wheel, which is fixedly connected to the first slider; the second sliding member also includes a fourth mating wheel, which is fixedly connected to the second slider; the first slider and the second slider are both slidably connected to the second connecting rod; the third concave cam engages the third mating wheel, and the fourth concave cam engages the fourth mating wheel; the second elastic member abuts between the first slider and the second slider.

45. The rotating mechanism according to claim 43, characterized in that: 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, and the third sliding cylinder and the fourth sliding cylinder are arranged at intervals along the length direction of the rotating mechanism; The second fixed plate is provided with a third damping chute and a fourth damping chute, the third damping chute and the fourth damping chute are arranged at intervals along the length direction of the rotating mechanism, a second guide slide block is provided between the third damping chute and the fourth damping chute, and the second guide slide block is provided with a second guide groove, and the second guide groove is respectively connected to the third damping chute and the fourth damping chute; The second guide sliding block is located in the gap between the third sliding cylinder and the fourth sliding cylinder, the third sliding cylinder is located in the third damping groove, and the fourth sliding cylinder is located in 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 can slide and rotate in the second guide groove.

46. ​​The rotation mechanism according to claim 43, characterized in that The rotating mechanism further includes a third connecting rod and a third elastic member, wherein the third connecting rod is located between the first connecting rod and the second connecting rod, and the first sliding member and the second sliding member are both slidably connected to the third connecting rod; the third elastic member is sleeved on the third connecting rod, and two ends of the third elastic member respectively abut against the first sliding member and the second sliding member; When the first sliding member and the second sliding member move closer to or farther away from each other, both ends of the third elastic member are also compressed or released synchronously.

47. The rotating mechanism according to any one of claims 1 to 16, characterized in that: 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 fixing 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 fixing plate.

48. A foldable electronic device, characterized in that: include: A first shell, a second shell, a display screen and a rotating mechanism as described in any one of claims 1 to 47, wherein the rotating mechanism is connected between the first shell and the second shell, and the display screen is installed on the first shell, the second shell and the rotating mechanism. When the rotating mechanism rotates, the first shell and the second shell rotate relative to each other, thereby driving the display screen to bend or unfold.

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