Rotating mechanism and foldable electronic device

Abstract

The present application provides a rotating mechanism and a foldable electronic device, wherein the rotating mechanism comprises a first fixed plate, a second fixed plate, a bearing base, a first synchronous swing arm and a second synchronous swing arm. The first synchronous swing arm comprises a first swing arm and a second swing arm, wherein the first swing arm and the second swing arm are detachably connected; the first swing arm comprises a first swinging body, a first connecting body and a first spiral body sequentially connected 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 bearing base; the second swing arm comprises a second swinging body, a second connecting body and a second spiral body sequentially connected along the width direction of the rotating mechanism; the second swinging body is slidably and rotatably connected to the first fixed plate, and the second spiral body is rotatably connected to the bearing base. The first swing arm and the second swing arm are separated, which reduces the difficulty of processing, improves the processing efficiency and reduces the cost.

Description

Technical Field

[0001] 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

[0002] With the development of science and technology, various electronic devices have become indispensable products in daily life and production. Among them, foldable electronic devices have gradually become a development trend due to their large display area and easy portability. The current foldable electronic devices mainly rely on a rotating mechanism to achieve the folding and unfolding functions. The rotating mechanism in the prior art uses a structure of multiple gears to achieve synchronous movement during the folding process.

[0003] However, the current rotating mechanism has many components such as synchronous gears, which are difficult to process, have low processing efficiency and high cost. Summary of the invention

[0004] The present application provides a rotating mechanism and a foldable electronic device, which are relatively simple to manufacture and have low cost.

[0005] A first aspect of the present application provides a rotating mechanism, including: a first fixed plate, a second fixed plate, a bearing base, a first synchronous swing arm, and a second synchronous swing arm.

[0006] The first fixed plate and the second fixed plate are located on opposite sides of the bearing base; the first synchronous swing arm and the second synchronous swing arm are respectively installed on opposite sides of the bearing base in the width direction, and are respectively rotatably connected to the bearing base; the first synchronous swing arm is slidably and rotatably connected to the first fixed plate, and the second synchronous swing arm is slidably and rotatably connected to the second fixed plate.

[0007] 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 bearing 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 first fixed plate, and the second spiral body is rotatably connected to the bearing base.

[0008] In this embodiment, when in the assembled state, the first swing arm and the second swing arm are detachably connected, and 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 are processed independently. The dimensions of the first swing arm and the second swing arm along the length direction of the rotating mechanism are reduced compared to the integrated swing arm, so that 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, a mold can be used for processing, and compared with the traditional computer numerical control (CNC) machine tool processing method, the processing efficiency and processing accuracy are significantly increased.

[0009] In some embodiments, the rotating mechanism further comprises a first mounting shaft, which 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 spirally extends around the axial direction of the first through hole; the first mounting shaft passes through the first through hole; and the first spiral body can rotate around the first mounting shaft.

[0010] 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, and the first mating surface is a helical surface; the first helical surface abuts against the first mating surface.

[0011] When the rotating mechanism switches from the unfolded state to the folded state, the first fixed plate rotates counterclockwise, the first swing arm and the second swing arm slide relative to the first fixed plate and rotate counterclockwise, the first swing arm and the second swing arm rotate counterclockwise relative to the bearing base, and the first spiral surface pushes the first matching surface to make the synchronous slider slide along the length direction of the rotating mechanism (negative direction of the Y axis). The second fixed plate rotates clockwise, the second synchronous swing arm slides and rotates relative to the second fixed plate, and the second synchronous swing arm moves synchronously with the first swing arm and the second swing arm under the action of the synchronous slider.

[0012] When the rotating mechanism switches from the folded state to the unfolded state, the first fixed plate rotates clockwise, the first swing arm and the second swing arm slide and rotate clockwise relative to the first fixed plate, the first swing arm and the second swing arm rotate clockwise relative to the bearing base, and the synchronous slider slides along the length direction (positive direction of the Y axis) of the rotating mechanism. 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 bearing base, and under the action of the synchronous slider, the second synchronous swing arm, the first swing arm and the second swing arm move synchronously.

[0013] In the present application, the first synchronous swing arm includes a first swing arm and a second swing arm. The first synchronous swing arm plays the same synchronization role as the integrally formed swing arm through the detachable connection of the first swing arm and the second swing arm. In addition, the first through hole provided in the first swing arm penetrates the first swing arm along the Y-axis direction, so that it is possible to process the first swing arm using a mold.

[0014] 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 buckle on 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 along 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.

[0015] In some embodiments, the first through hole is a circular hole, and the diameter of the first through hole along the length direction of the rotating mechanism remains unchanged. That is, the curvature of the hole wall surface of the first through hole in the Y-axis direction is always consistent, and there is no local convexity or concave situation. Therefore, after the first through hole is processed, it can be smoothly demolded, thereby realizing the solution of using the mold for processing the first swing arm.

[0016] In some embodiments, the first swinging body is in the shape of a thin plate, and the first spiral body has a cylindrical shape with an inclined notch (first spiral opening). The first connecting body is approximately S-shaped, and the first connecting body is connected between the first swinging body and the first spiral body, so as to facilitate the first swinging body to be connected to the first fixed plate, and to facilitate the first spiral body to be connected to the bearing base. The first swing arm of this structure has a simple structure and can be formed by mold processing, which reduces costs and improves processing efficiency.

[0017] In some embodiments, the first spiral body includes a first inner peripheral surface, a first outer peripheral surface and a first end wall surface; the first inner peripheral surface is the hole wall surface of the first through hole, and the first outer peripheral surface is away from the first inner peripheral surface; the first end wall surface is connected between the first inner peripheral surface and the first outer peripheral 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 peripheral surface and the first outer peripheral surface, and one end of the first spiral surface is connected to the first end wall surface. The first inner peripheral surface, the first outer peripheral surface, the first end wall surface, the first through hole and the first spiral surface can all be processed by molds, which reduces costs and improves processing efficiency.

[0018] 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 a 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.

[0019] Specifically, the synchronization body includes a first synchronization surface and a second synchronization surface opposite to each other in the Z-axis direction, and a first synchronization side surface and a second synchronization side surface opposite to each other in the X-axis direction. The first synchronization side surface is connected between one side of the first synchronization surface and one side of the second synchronization surface, and the second synchronization side surface is connected between the other side of the first synchronization surface and the other side of the second synchronization surface. The first synchronization side surface and the second synchronization side surface are both inclined arc-shaped surfaces. The first synchronization side surface and the second synchronization side surface are both inclined relative to the central axis of the synchronization slider along the Z-axis direction, and the inclination direction of the first synchronization side surface and the second synchronization side surface is away from the central axis of the synchronization slider 43 along the axial direction.

[0020] The first spiral block is formed along the first synchronous side protrusion, and the first spiral block is cylindrical. The first through hole penetrates the first spiral block along the Y-axis direction, so that the first spiral block can be processed by a mold. Specifically, the raw material is placed in the lower mold of the mold, and then the upper mold is driven to cooperate with the lower mold to process the required structure on the raw material, so that the raw material becomes the first spiral block. After the processing is completed, it can be demolded along the Y-axis direction.

[0021] In the traditional structure, because the synchronous swing arm is integrally formed, the spiral structure of the synchronous slider and the synchronous swing arm is relatively long. The interior of the relatively long spiral structure is spiral, and it cannot be processed by a mold, but can only be processed by CNC. The first through hole and the first mating surface in the present application can be processed by a mold, which is lower in cost and higher in efficiency than CNC processing.

[0022] In some embodiments, 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 swing arm is provided with a second through hole and a second spiral surface, and 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, and the first installation axis also passes through the second through hole. The second swing arm can rotate around the first installation axis; 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.

[0023] When the rotating mechanism switches from the folded state to the unfolded state, the first fixed plate rotates clockwise, the first swing arm and the second swing arm rotate clockwise, and the second spiral surface pushes the second matching surface, so that the synchronous slider slides along the length direction of the rotating mechanism (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 bearing base, and under the action of the synchronous slider, the second synchronous swing arm, the first swing arm and the second swing arm move synchronously.

[0024] The second through hole provided on the second swing arm passes through the second swing arm along 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 buckle on 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 along 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 one-piece synchronous swing arm, it is easier to process, and the mold processing efficiency is higher, the precision is higher, and the cost is lower.

[0025] In some embodiments, the first spiral block is further provided with a first connecting surface, a second connecting surface, a first inner wall surface and a first outer wall surface; the first inner wall surface and the first outer wall surface are opposite to each other along the length direction of the rotating mechanism, and the first through hole penetrates the first connecting surface and the second connecting surface; a part of the first inner wall surface is the hole wall surface of the first through hole, and the first outer wall surface is away from the first inner wall surface; one end of the first matching surface is connected to the first connecting surface, and the other end of the first matching surface extends in a direction away from the first connecting surface and is connected to the synchronous body; one end of the second matching surface is connected to the second connecting surface, and the other end of the second matching surface extends in a direction away from the second connecting surface and is connected to the synchronous body. Therefore, the first connecting surface, the second connecting surface, the first inner wall surface, the first outer wall surface, the first matching surface, the second matching surface, and the first through hole can all be processed by molds. This reduces costs and improves processing efficiency.

[0026] In some embodiments, the curvature of the first inner wall surface in the length direction of the rotating mechanism is equal, that is, remains unchanged. Thus, it is ensured that the first inner wall surface, especially the portion of the first inner wall surface constituting the first through hole, can be processed by a mold.

[0027] In some embodiments, the synchronous body is provided with a first ejection groove, and the first ejection groove 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. Therefore, when processing the second mating surface, the position of the first ejection groove can be used to eject the mold along the Z-axis direction, solving the problem that the second mating surface is difficult to eject, so that the second mating surface can be processed by the mold.

[0028] In some embodiments, the bearing 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 two ends of the first mounting shaft are respectively fixedly connected to two opposite groove walls of the first mounting groove. Thus, the structure of the rotating mechanism is relatively compact, the volume is relatively small, and the rotating mechanism is made thinner and lighter.

[0029] 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.

[0030] The first pre-pressed member and the second pre-pressed member are disc springs or wave springs. When assembling the rotating mechanism, the first pre-pressed member is slightly compressed, so that the first pre-pressed member provides a pre-tightening force between the first helical surface and the first mating surface. The second pre-pressed member is slightly compressed, so that the second pre-pressed member provides a pre-tightening force between the second helical surface and the second mating surface.

[0031] Thus, it is ensured that there is abutment force between the first helical surface and the first mating surface, which prevents synchronization failure and increases the reliability of the synchronization component. It is ensured that there is abutment force between the second helical surface and the second mating surface, which prevents synchronization failure and increases the reliability of the synchronization component.

[0032] 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.

[0033] The axial position of the first adjusting member is adjustable on the first mounting shaft so that the first adjusting member moves toward or away from the first pre-pressing member; when the first adjusting member moves toward the first pre-pressing member, the force applied by the first adjusting member to the first pre-pressing member increases, and the pre-tightening force provided by the first pre-pressing member increases; when the first adjusting member moves away from the first pre-pressing member, the force applied by the first adjusting member to the first pre-pressing member decreases, and the pre-tightening force provided by the first pre-pressing member decreases.

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

[0035] The first adjustment member is a locking nut, and the first adjustment member is threadedly matched with the first mounting shaft. The first adjustment member is in contact with the first pre-pressing member. When the first adjustment member is screwed in the first direction, the first adjustment member moves toward the first pre-pressing member, so that the compression amplitude of the first pre-pressing member increases, and the force applied by the first pre-pressing member to the first spiral body of the first swing arm increases. In this way, the preload force between the first spiral surface and the first mating surface is increased.

[0036] When the first adjustment member is screwed in the 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 the first direction is clockwise and the second direction is counterclockwise. At this time, the first adjustment member moves away from the first pre-pressing member, so that the compression amplitude of the first pre-pressing member is reduced, and the force applied by the first pre-pressing member to the first spiral body of the first swing arm is increased. In this way, the preload force between the first spiral surface and the first mating surface is reduced.

[0037] The second adjusting part is a retaining spring. When the position of the second adjusting part on the first mounting shaft needs to be adjusted, the operator removes the second adjusting part from the first mounting shaft manually or using a tool. Then the second adjusting part is installed on the first mounting shaft manually or using a tool. At this time, the axial position of the second adjusting part on the first mounting shaft changes. If the second adjusting part is closer to the second pre-pressed part than before, that is, the second adjusting part moves closer to the second pre-pressed part than before, the second adjusting part increases the compression amplitude of the second pre-pressed part. At this time, the force applied by the second pre-pressed part to the second spiral body of the second swing arm increases. In this way, the preload force between the second spiral surface and the second mating surface is increased.

[0038] If the second adjusting member is further away from the second pre-pressing member than before, that is, the second adjusting member moves in a direction away from the second pre-pressing member than before, the second adjusting member reduces the compression amplitude of the second pre-pressing member, and the force applied by the second pre-pressing member to the second spiral body of the second swing arm is reduced. Thus, the preload force between the second spiral surface and the second mating surface is reduced.

[0039] 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.

[0040] In some embodiments, the second through hole is a circular hole, and the diameter of the second through hole along the length direction of the rotating mechanism remains unchanged. That is, the curvature of the hole wall surface of the second through hole in the Y-axis direction is always consistent, and there is no local convexity or concave situation. Therefore, after the second through hole is processed, it can be smoothly demolded, thereby realizing the solution of using the mold for processing the second swing arm.

[0041] In some embodiments, the second swing body is in the shape of a thin plate, and the second spiral body has a cylindrical shape with an inclined notch (second spiral opening). The second connecting body is approximately S-shaped, and the second connecting body is connected between the second swing body and the second spiral body, so that the second swing body can be connected to the first fixed plate and the second spiral body can be connected to the bearing base. The second swing arm of this structure has a simple structure and can be formed by mold processing, which reduces costs and improves processing efficiency.

[0042] In some embodiments, the second spiral body includes a second inner peripheral surface, a second outer peripheral surface, and a second end wall surface; the second inner peripheral surface is the hole wall surface of the second through hole, and the second outer peripheral surface is away from the second inner peripheral surface; the second end wall surface is connected between the second inner peripheral surface and the second outer peripheral 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 peripheral surface and the second outer peripheral surface, and one end of the second spiral surface is connected to the two end walls. The second inner peripheral surface, the second outer peripheral surface, the second end wall surface, the second through hole, and the second spiral surface can all be processed by molds, which reduces costs and improves processing efficiency.

[0043] In some embodiments, one of the first swing arm and the second swing arm is provided with a clamping groove, and the other of the first swing arm and the second swing arm is provided with a clamping block; the clamping block is clamped in the clamping groove. The first swing arm and the second swing arm are detachably connected through the clamping groove and the clamping block, which has a simple structure, is easy to process, and has a low cost.

[0044] In some embodiments, an elastic buckle is provided on one side of the first swing arm, and the elastic buckle is the above-mentioned clamping block. An inner groove is provided on one side of the second swing arm, and the inner groove is the above-mentioned clamping groove. The elastic buckle is clamped in the inner groove, so that the first swing arm and the second swing arm can be detachably connected.

[0045] In some embodiments, 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. Thus, the structure of the first synchronous swing arm is relatively compact, and the reliability of the connection between the first swing arm and the second swing arm is relatively high.

[0046] In some embodiments, the first clamping block and the first clamping slot are both trapezoidal, 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, 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. Connecting the first swing arm and the second swing arm can make the first clamping block clamped in the second clamping slot along the Z-axis direction, and at the same time, the second clamping block clamped in the first clamping slot. Because the first clamping slot, the second clamping slot, the first clamping block and the second clamping block are all trapezoidal. When the first swing arm and the second swing arm move, no relative movement along the Z-axis direction will occur, and when moving in the X-axis direction and the Y-axis direction, the first clamping block is reliably connected in the second clamping slot and will not fall out of the second clamping slot. Similarly, the second clamping block is reliably connected in the first clamping slot and will not fall out of the first clamping slot. 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.

[0047] 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 rotatably connected to the second fixed plate, and the third spiral body is rotatably connected to the bearing 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 bearing base.

[0048] In the assembled state, the third swing arm and the fourth swing arm are detachably connected. When not assembled, the third swing arm and the fourth swing arm can be disassembled into a separate state, so the third swing arm and the fourth swing arm can be processed independently. The dimensions of the third swing arm and the fourth swing arm along the length direction of the rotating mechanism are smaller than those of the integrated swing arm, so the processing difficulty of the third swing arm and the fourth swing arm is reduced, the processing efficiency is improved, and the cost is reduced. In particular, after the third swing arm and the fourth swing arm are separated, they can be processed using a mold, and compared with the traditional CNC processing method, the processing efficiency and processing accuracy are significantly increased.

[0049] In some embodiments, the rotating mechanism also includes a second mounting shaft, which is fixedly connected to the supporting 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 length direction of the rotating mechanism; the third spiral surface extends in an axial spiral around the third through hole; the second mounting shaft passes through the third through hole, and the third spiral body can rotate around the second mounting shaft.

[0050] In some embodiments, the rotating mechanism further includes a synchronous slider; the synchronous slider is slidably installed 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.

[0051] When the rotating mechanism switches from the unfolded state to the folded state, the second fixed plate rotates clockwise, the third swing arm and the fourth swing arm rotate clockwise, and the third spiral surface pushes the third matching surface, so that the synchronous slider slides along the length direction of the rotating mechanism (negative direction of the Y axis). 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, and the synchronous slider slides along the length direction of the rotating mechanism (positive direction of the Y axis).

[0052] In the present application, the second synchronous swing arm includes a third swing arm and a fourth swing arm. The third swing arm and the fourth swing arm are detachably connected, so that the second synchronous swing arm plays the same synchronization role as the integrally formed swing arm. In addition, the third through hole provided in the third swing arm penetrates the first swing arm along the Y-axis direction, so that it is possible to process the third swing arm using a mold.

[0053] Specifically, when processing the third swing arm, the raw material is placed in the lower mold of the mold, and then the lower mold is driven to buckle on the upper mold, so that the upper mold and the lower mold cooperate to process the third through hole and the third spiral surface. Because the third through hole passes through the third swing arm along 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.

[0054] In some embodiments, the third through hole is a circular hole, and the diameter of the third through hole along the length direction of the rotating mechanism remains unchanged. That is, the curvature of the wall surface of the third through hole in the Y-axis direction is always consistent, and there is no local convexity or concave. Therefore, after the third through hole is processed, it can be smoothly demolded, thereby realizing the solution of using a mold for processing the third swing arm.

[0055] In some embodiments, the third swing body is in the shape of a thin plate, and the third spiral body has a cylindrical shape with an inclined notch (third spiral mouth). The third connecting body is approximately S-shaped, and the third connecting body is connected between the third swing body and the third spiral body, so that the third swing body is convenient for connecting the second fixed plate and the third spiral body to the bearing base. The third swing arm of this structure has a simple structure and can be formed by mold processing, which reduces costs and improves processing efficiency.

[0056] In some embodiments, the third spiral body includes a third inner circumference, a third outer circumference and a third end wall; the third inner circumference is the hole wall of the third through hole, and the third outer circumference is away from the third inner circumference; the third end wall is connected between the third inner circumference and the third outer circumference, and the third through hole runs through the third end wall; the opposite sides of the third spiral surface are respectively connected to the third inner circumference and the third outer circumference, and one end of the third spiral surface is connected to the third end wall. The third inner circumference, the third outer circumference, the third end wall, the third through hole and the third spiral surface can all be processed by molds, which reduces costs and improves processing efficiency.

[0057] 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 a 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.

[0058] Specifically, the second spiral block is formed along the second synchronous side protrusion, and the second spiral block is cylindrical. The second through hole penetrates the second spiral block along the Y-axis direction, so that the second spiral block can be processed by a mold. Specifically, the raw material is placed in the lower mold of the mold, and then the upper mold is driven to cooperate with the lower mold to process the required structure on the raw material, so that the raw material becomes the second spiral block. After the processing is completed, it can be demolded along the Y-axis direction.

[0059] In the traditional structure, because the synchronous swing arm is integrally formed, the spiral structure of the synchronous slider and the synchronous swing arm is relatively long. The interior of the relatively long spiral structure is spiral-shaped and cannot be processed by a mold, but can only be processed by CNC. The second through hole and the third matching surface in the present application can be processed by a mold, which is lower in cost and higher in efficiency than CNC processing.

[0060] In some embodiments, 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, the fourth mating surface extends spirally around the axial direction of the second through hole, the fourth swing arm is provided with a fourth through hole and a fourth spiral 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 installation shaft also passes through the fourth through hole, and the fourth spiral body can rotate around the second installation shaft; the fourth spiral surface extends spirally around the axial direction of the fourth through hole; the third spiral surface abuts the third mating surface.

[0061] 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 matching surface, and the synchronous slider slides along the length direction of the rotating mechanism (positive direction of the Y axis).

[0062] The fourth through hole provided on the fourth swing arm passes through the fourth swing arm along 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 buckle on 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 along 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 one-piece synchronous swing arm, it is easier to process, and the mold processing efficiency is higher, the precision is higher, and the cost is lower.

[0063] 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 penetrates 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.

[0064] 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.

[0065] In some embodiments, the curvature of the second inner wall surface in the length direction of the rotating mechanism remains unchanged, thereby ensuring that the second inner wall surface, especially the portion of the second inner wall surface constituting the second through hole, can be processed by a mold.

[0066] In some embodiments, the synchronous body is provided with a second ejection groove, and the second ejection groove 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. Therefore, when processing the fourth mating surface, the position of the second ejection groove can be used to eject the mold along the Z-axis direction, solving the problem that the fourth mating surface is difficult to eject, so that the fourth mating surface can be processed by the mold.

[0067] In some embodiments, the fourth through hole is a circular hole, and the diameter of the fourth through hole along the length direction of the rotating mechanism remains unchanged. That is, the curvature of the hole wall surface of the fourth through hole in the Y-axis direction is always consistent, and there is no local convexity or concave situation. Therefore, after the fourth through hole is processed, it can be smoothly demolded, thereby realizing the solution of using the mold for processing the fourth swing arm.

[0068] In some embodiments, the fourth spiral body includes a fourth inner circumference, a fourth outer circumference and a fourth end wall; the fourth inner circumference is the hole wall of the fourth through hole, and the fourth outer circumference is away from the fourth inner circumference; the fourth end wall is connected between the fourth inner circumference and the fourth outer circumference, and the fourth through hole runs through the fourth end wall; the opposite sides of the fourth spiral surface are respectively connected to the fourth inner circumference and the fourth outer circumference, and one end of the fourth spiral surface is respectively connected to the fourth end wall. The fourth inner circumference, the fourth outer circumference, the fourth end wall, the fourth through hole and the fourth spiral surface can all be processed by molds, which reduces costs and improves processing efficiency.

[0069] In some embodiments, the bearing base is provided with a first mounting groove, a portion of the third swing arm, a portion of the fourth swing arm, a synchronous slider, and a second mounting shaft are all mounted in the first mounting groove; and two ends of the second mounting shaft are respectively fixedly connected to two groove walls of the first mounting groove. Thus, the structure of the rotating mechanism is relatively compact, the volume is relatively small, and the rotating mechanism is made thinner and lighter.

[0070] 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.

[0071] The third pre-pressing member and the fourth pre-pressing member are disc springs or wave springs. When assembling the rotating mechanism, the third pre-pressing member is slightly compressed, so that the third pre-pressing member provides a pre-tightening force between the third helical surface and the third mating surface. The fourth pre-pressing member is slightly compressed, so that the fourth pre-pressing member provides a pre-tightening force between the fourth helical surface and the fourth mating surface.

[0072] Thus, the third helical surface and the third matching surface are ensured to have abutment force, which prevents synchronization failure and increases the reliability of the synchronization component. The fourth helical surface and the fourth matching surface are ensured to have abutment force, which prevents synchronization failure and increases the reliability of the synchronization component.

[0073] 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.

[0074] The axial position of the third adjusting member in the second mounting shaft can be adjusted so that the third adjusting member moves toward or away from the third preload member; when the third adjusting member moves toward the third preload member, the force applied by the third adjusting member to the third preload member increases, and the preload force provided by the third preload member increases; when the third adjusting member moves away from the third preload member, the force applied by the third adjusting member to the third preload member decreases, and the preload force provided by the third preload member decreases.

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

[0076] The third adjustment member is a locking nut, and the third adjustment member is threadedly matched with the second mounting shaft. The third adjustment member is in contact with the third pre-pressing member. When the third adjustment member is screwed in the first direction, the third adjustment member moves toward the third pre-pressing member, so that the compression amplitude of the third pre-pressing member increases, and at this time, the force applied by the third pre-pressing member to the third helical body of the third swing arm increases. In this way, the preload force between the third helical surface and the third matching surface is increased.

[0077] When the third adjusting member is screwed in the 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 the first direction is clockwise and the second direction is counterclockwise. At this time, the third adjusting member moves away from the third pre-pressing member, so that the compression amplitude of the third pre-pressing member is reduced, and the force applied by the third pre-pressing member to the third helical body of the third swing arm is increased. In this way, the preload force between the third helical surface and the third mating surface is reduced.

[0078] The fourth adjustment part is a retaining spring. When the position of the fourth adjustment part on the second mounting shaft needs to be adjusted, the operator removes the fourth adjustment part from the second mounting shaft manually or using a tool. Then the fourth adjustment part is installed on the second mounting shaft manually or using a tool. At this time, the axial position of the fourth adjustment part on the second mounting shaft changes. If the fourth adjustment part is closer to the fourth preload part than before, that is, the fourth adjustment part moves closer to the fourth preload part than before, the fourth adjustment part increases the compression amplitude of the fourth preload part. At this time, the force applied by the fourth preload part to the fourth helical body of the fourth swing arm increases. In this way, the preload force between the fourth helical surface and the fourth mating surface is increased.

[0079] If the fourth adjustment member is further away from the fourth pre-pressing member than before, that is, the fourth adjustment member moves in a direction away from the fourth pre-pressing member than before, the fourth adjustment member reduces the compression amplitude of the fourth pre-pressing member, and at this time, the force applied by the fourth pre-pressing member to the fourth helical body of the fourth swing arm is reduced. Thus, the preload force between the fourth helical surface and the fourth mating surface is reduced.

[0080] 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.

[0081] In some embodiments, the fourth through hole is a circular hole, and the diameter of the fourth through hole along the length direction of the rotating mechanism remains unchanged. That is, the curvature of the hole wall surface of the fourth through hole in the Y-axis direction is always consistent, and there is no local convexity or concave situation. Therefore, after the fourth through hole is processed, it can be smoothly demolded, thereby realizing the solution of using the mold for processing the fourth swing arm.

[0082] In some embodiments, the fourth swing body is in the shape of a thin plate, and the fourth spiral body has a cylindrical shape with an inclined notch (fourth spiral mouth). The fourth connecting body is approximately S-shaped, and the fourth connecting body is connected between the fourth swing body and the fourth spiral body, so as to facilitate the fourth swing body to connect to the first fixed plate, and to facilitate the fourth spiral body to connect to the bearing base. The fourth swing arm of this structure has a simple structure and can be formed by mold processing, which reduces costs and improves processing efficiency.

[0083] In some embodiments, the fourth spiral body includes a fourth inner circumference, a fourth outer circumference and a fourth end wall; the fourth inner circumference is the hole wall of the fourth through hole, and the fourth outer circumference is away from the fourth inner circumference; the fourth end wall is connected between the fourth inner circumference and the fourth outer circumference, and the fourth through hole runs through the fourth end wall; the opposite sides of the fourth spiral surface are respectively connected to the fourth inner circumference and the fourth outer circumference, and the opposite ends of the fourth spiral surface are respectively connected to the synchronous body and the fourth end wall. The fourth inner circumference, the fourth outer circumference, the fourth end wall, the fourth through hole and the fourth spiral surface can all be processed by molds, which reduces costs and improves processing efficiency.

[0084] In some embodiments, one of the third swing arm and the fourth swing arm is provided with a clamping groove, and the other of the third swing arm and the fourth swing arm is provided with a clamping block; the clamping block is clamped in the clamping groove. The third swing arm and the fourth swing arm are detachably connected through the clamping groove and the clamping block, which has a simple structure, is easy to process, and has a low cost.

[0085] In some embodiments, an elastic buckle is provided on one side of the third swing arm, and the elastic buckle is the above-mentioned clamping block. An inner groove is provided on one side of the fourth swing arm, and the inner groove is the above-mentioned clamping groove. The elastic buckle is clamped in the inner groove, so that the third swing arm and the fourth swing arm can be detachably connected.

[0086] In some embodiments, one side of the third swing arm is provided with a third clamping groove and a third clamping block arranged alternately, and one side of the fourth swing arm is provided with a fourth clamping groove and a fourth clamping block arranged alternately; the third clamping block is clamped in the fourth clamping groove, and the fourth clamping block is clamped in the third clamping groove. Thus, the structure of the second synchronous swing arm is relatively compact, and the reliability of the connection between the third swing arm and the fourth swing arm is relatively high.

[0087] In some embodiments, the third clamping block and the third clamping slot are both trapezoidal, 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, 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. Connecting the third swing arm and the fourth swing arm can make the third clamping block clamped in the fourth clamping slot along the Z-axis direction, and at the same time, the fourth clamping block clamped in the third clamping slot. Because the third clamping slot, the fourth clamping slot, the third clamping block and the fourth clamping block are all trapezoidal. When the third swing arm and the fourth swing arm move, no relative movement along the Z-axis direction will occur, and when moving in the X-axis direction and the Y-axis direction, the third clamping block is reliably connected in the fourth clamping slot and will not fall out of the fourth clamping slot. Similarly, the fourth clamping block is reliably connected in the third clamping slot and will not come out of the third clamping slot, thereby ensuring that the third swing arm and the fourth swing arm are reliably connected, reducing costs and facilitating processing.

[0088] In some embodiments, the rotating 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 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.

[0089] When the first sliding member and the second sliding member are close to each other, both ends of the first elastic member are compressed at the same time. Compared with a single end being compressed, the first elastic member can provide double the damping force for the first fixed plate, so that the user can get a better damping feel. When the first sliding member and the second sliding member are away from each other, both ends of the first elastic member are released at the same time. Compared with only one end being compressed and then released, double the damping force can be provided for the first fixed plate, so that the user can get a better damping feel.

[0090] 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 fixedly connected, and the second sliding member includes a second slider and a second mating wheel 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.

[0091] The first concave cam includes a plurality of first concave portions and a plurality of first protrusions, and the plurality of first concave portions and the plurality of first protrusions are alternately distributed. The second concave cam includes a plurality of second concave portions and a plurality of second protrusions, and the plurality of second concave portions and the plurality of second protrusions are alternately distributed. The first mating wheel includes a plurality of first mating concave portions and a plurality of first mating protrusions, and the plurality of first mating concave portions and the plurality of first mating protrusions are alternately distributed. The second mating wheel includes a plurality of second mating concave portions and a plurality of second mating protrusions, and the plurality of second mating concave portions and the plurality of second mating protrusions are alternately distributed.

[0092] When the rotating mechanism is in the unfolded state, that is, the first protrusion is located in the first matching recess, and the first matching protrusion is located in the first recess; the second protrusion is located in the second matching recess, and the second matching protrusion is located in the second recess. When the rotating mechanism switches from the unfolded state to the folded state, the first protrusion gradually moves out of the first matching recess, and the first matching protrusion gradually moves out of the first recess; the second protrusion gradually moves out of the second matching recess, and the second matching 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 against the end of the first matching protrusion of the first matching wheel. The second protrusion of the second concave cam abuts against the end of the second matching protrusion of the second matching 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 compressed synchronously.

[0093] 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 provided between the first damping slide groove and the second damping slide groove, the first guide sliding block is provided with a first guide sliding groove, and the first guide sliding 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 sliding groove and the second sliding cylinder, and the first connecting shaft can slide and rotate in the first guide sliding groove.

[0094] When the first fixing plate rotates relative to the bearing base, the first connecting shaft slides and rotates in the first guide slot, thereby realizing the sliding and rotation of the first damping swing arm. This structure makes the rotating mechanism more compact.

[0095] In some embodiments, the rotating 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 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.

[0096] When the first sliding member and the second sliding member are close to each other, both ends of the second elastic member are compressed at the same time. Compared with a single end being compressed, the second elastic member can provide double the damping force for the second fixed plate, so that the user can get a better damping feel. When the first sliding member and the second sliding member are away from each other, both ends of the second elastic member are released at the same time. Compared with only one end being compressed and then released, double the damping force can be provided for the second fixed plate, so that the user can get a better damping feel.

[0097] 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, 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.

[0098] The third concave cam includes a plurality of third recesses and a plurality of third protrusions, and the plurality of third recesses and the plurality of third protrusions are alternately distributed. The fourth concave cam includes a plurality of fourth recesses and a plurality of fourth protrusions, and the plurality of fourth recesses and the plurality of fourth protrusions are alternately distributed. The third mating wheel includes a plurality of third mating recesses and a plurality of third mating protrusions, and the plurality of third mating recesses and the plurality of third mating protrusions are alternately distributed. The fourth mating wheel includes a plurality of fourth mating recesses and a plurality of fourth mating protrusions, and the plurality of fourth mating recesses and the plurality of fourth mating protrusions are alternately distributed.

[0099] When the rotating mechanism is in the unfolded state, that is, the third protrusion is located in the third matching recess, and the third matching protrusion is located in the third recess; the fourth protrusion is located in the fourth matching recess, and the fourth matching protrusion is located in the fourth recess. When the rotating mechanism switches from the unfolded state to the folded state, the third protrusion gradually moves out of the third matching recess, and the third matching protrusion gradually moves out of the third recess; the fourth protrusion gradually moves out of the fourth matching recess, and the fourth matching 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 and the end of the third matching protrusion of the third matching wheel abut. The fourth protrusion of the fourth concave cam and the end of the fourth matching protrusion of the fourth matching wheel abut. 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.

[0100] 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 with 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.

[0101] When the second fixing plate rotates relative to the bearing base, the second connecting shaft slides and rotates in the second guide slot, thereby realizing the sliding and rotation of the second damping swing arm. This structure makes the rotating mechanism more compact.

[0102] In some embodiments, the rotating mechanism further includes a third connecting rod and a third elastic member, the third connecting rod is located between the first connecting rod and the second connecting rod, the first sliding member and the second sliding member are both slidably connected to the third connecting rod; the third elastic member is sleeved on the third connecting rod, and the two ends of the third elastic member abut against the first sliding member and the second sliding member respectively; when the first sliding member and the second sliding member approach or move away from each other, the two ends of the third elastic member are also synchronously compressed or released. The third elastic member can also provide damping force for the first fixing plate and the second fixing plate, so that the user can obtain a better damping feel.

[0103] 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.

[0104] 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 is slidably and rotatably connected to the bearing base, and the other end of the first main swing arm is rotatably connected to the first fixed plate; one end of the second main swing arm is slidably and rotatably connected to the bearing base, and the other end of the second main swing arm is rotatably connected to the second fixed plate.

[0105] 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.

[0106] 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.

[0107] In addition, the first through hole provided on the first swing arm passes through the first swing arm along 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 buckle on 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 along 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 one-piece 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

[0108] 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.

[0109] Figure 1 It is a schematic diagram of the structure of the foldable electronic device provided in an embodiment of the present application in a first state.

[0110] Figure 2 It is a schematic diagram of the structure of the foldable electronic device provided in an embodiment of the present application in the second state.

[0111] Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the foldable electronic device shown.

[0112] Figure 4 yes Figure 3Schematic diagram of the structure of the rotating mechanism of the foldable electronic device shown in.

[0113] Figure 5 yes Figure 4 Schematic diagram of the exploded structure of the rotating mechanism shown in .

[0114] Figure 6 yes Figure 4 Schematic diagram of the structure of the fixed component of the rotating mechanism shown in.

[0115] Figure 7 yes Figure 4 Schematic diagram of the structure of the supporting base of the rotating mechanism shown in FIG.

[0116] Figure 8 yes Figure 4 Schematic diagram of the structure of the swing arm assembly of the rotating mechanism shown in.

[0117] Fig. 9 yes Figure 8 A schematic structural diagram of the first main swing arm of the swing arm assembly is shown in .

[0118] Fig.10 yes Figure 8 A schematic structural diagram of the second main swing arm of the swing arm assembly is shown in .

[0119] Fig.11 yes Figure 4 Schematic diagram of the structure of the synchronous component of the rotating mechanism shown in.

[0120] Fig.12 yes Fig.11 Schematic diagram of the split structure of the synchronization component shown in.

[0121] Fig.13 yes Fig.12 A schematic structural diagram of the first synchronous swing arm of the synchronous assembly shown in .

[0122] Fig.14 yes Fig.12 A schematic structural diagram of the second synchronous swing arm of the synchronous assembly shown in .

[0123] Fig.15 yes Fig.12 Schematic diagram of the structure of the synchronization slider of the synchronization component shown in .

[0124] Fig.16 yes Figure 4 Schematic diagram of the structure of the damping assembly of the rotating mechanism shown in.

[0125] Fig.17 yes Fig.16 Schematic diagram of the split structure of the damping component shown in.

[0126] Fig.18 yes Fig.17 A schematic structural diagram of the first damping swing arm of the damping assembly is shown in FIG.

[0127] Fig.19 yes Fig.17 A schematic structural diagram of the second damping swing arm of the damping assembly is shown in FIG.

[0128] Fig. 20 yes Fig.17 A schematic structural diagram of the first sliding member of the damping assembly is shown in FIG.

[0129] Fig.21 yes Fig.17 A schematic structural diagram of the second sliding member of the damping assembly shown in FIG.

[0130] Fig. 22 yes Figure 4 The schematic diagram of the structure of the rotating mechanism switching from the unfolded state to the folded state is shown in FIG.

[0131] Fig.23 yes Fig. 22 A partial cross-sectional view of the rotating mechanism shown in FIG.

[0132] Fig.24 yes Figure 4 Schematic diagram of the structure of the rotating mechanism in a folded state.

[0133] Fig.25 yes Fig.23 A partial cross-sectional view of the rotating mechanism shown in FIG. DETAILED DESCRIPTION

[0134] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0135] The rotating mechanism used in the existing foldable electronic device includes a large number of synchronous gears and other components, which are relatively complex in structure, difficult to assemble, and heavy and bulky, which has a great impact on the lightweight design of the electronic device. The rotating mechanism and foldable electronic device provided in the embodiment of the present application have a small number of synchronous gears and a simpler structure, which reduces the difficulty of assembly, reduces the weight and volume of the rotating mechanism, and is conducive to the lightweight design of the electronic device.

[0136] See also Figure 1 and Figure 2 , Figure 1 is a schematic structural diagram of a foldable electronic device 1000 provided in an embodiment of the present application in a first state, Figure 2 3 is a schematic diagram of the structure of the foldable electronic device 1000 provided in an embodiment of the present application in the second state.

[0137] Figure 1 The foldable electronic device 1000 is shown in a folded state. Figure 2 The foldable electronic device 1000 is shown in an unfolded state. Figure 2 The unfolding angle of the foldable electronic device 1000 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, etc. In the embodiment of the present application, the foldable electronic device 1000 is taken as a cell phone for example.

[0138] It should be noted that the angles illustrated in the embodiments of the present application are allowed to have slight deviations. Figure 2 The unfolding angle of the foldable electronic device 1000 shown as 180 degrees means that it can be 180 degrees or approximately 180 degrees, such as 170 degrees, 175 degrees, 185 degrees, and 190 degrees, etc. The angles described below as examples can be understood in the same way.

[0139] 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.

[0140] See also Figure 3 , Figure 3 yes Figure 2 Schematic diagram of the exploded structure of the foldable electronic device shown.

[0141] The foldable electronic device 1000 includes a main body 200 and a display screen 300, and the display screen 300 is installed on the main body 200. The display screen 300 includes a display surface and a mounting surface, and the display surface and the mounting surface 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, and the third display part 330 is flexible and can be bent along the X-axis direction. 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.

[0142] In this embodiment, the display screen 300 adopts a flexible display screen, for example, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (miniorganic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, and a quantum dot light emitting diode (quantum dot light emitting diodes, QLED) display screen.

[0143] The main body 200 includes a first shell 210, a second shell 220 and a rotating mechanism 100. The first shell 210 is provided with a first receiving groove (not shown), the second shell 220 is provided with a second receiving groove (not shown), and the first receiving groove and the second receiving groove are connected to form a receiving groove. The rotating mechanism 100 is installed in the receiving groove and is fixedly connected with the first shell 210 and the second shell 220 to realize the rotating connection between the first shell 210 and the second shell 220, and the first shell 210 and the second shell 220 can be relatively rotated through the rotating mechanism 100, so that the main body 200 can switch between the folded state and the unfolded state.

[0144] 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.

[0145] The display screen 300 is mounted on the main body 200, and the mounting surface is fixedly connected to the main body 200. Specifically, the first housing 210 carries the first display portion 310, and the second housing 220 carries the second display portion 320. In other words, the first display portion 310 is mounted on the first housing 210, and the second display portion 320 is mounted on the second housing 220. The rotating mechanism 100 is arranged opposite to the third display portion 330 to achieve the bending of the display screen 300.

[0146] The relative rotation of the first shell 210 and the second shell 220 makes the main body 200 in the folded state, which means that the first shell 210 and the second shell 220 rotate through the rotating mechanism 100 and approach each other, and the surfaces of the first shell 210 and the second shell 220 that carry the display screen 300 are opposite. In the application process, when the main body 200 is in the fully folded state, after the display screen 300 installed in the first shell 210 and the second shell 220 are folded, the display surface of the display screen 300 located in the first display part 310 and the display surface located in the second display part 320 are partially or completely in contact. The relative rotation of the first shell 210 and the second shell 220 makes the main body 200 in the unfolding process (the first shell 210 and the second shell 220 can stay at any angle, such as the first shell 210 and the second shell 220 are at an angle of 90 degrees, 120 degrees, etc., that is, the display screen 300 is in a semi-expanded state). The first shell 210 and the second shell 220 rotate through the rotating mechanism 100 and move away from each other, and the angle between the first shell 210 and the second shell 220 becomes larger and larger until the first shell 210 and the second shell 220 rotate relative to each other so that the main body 200 is flattened and in an unfolded state, and the angle between the first shell 210 and the second shell 220 can be close to 180 degrees or equal to 180 degrees. The first shell 210 and the second shell 220 are roughly in a flat state. At the same time, the first shell 210 and the second shell 220 move away from each other to drive the display screen 300 to unfold until the foldable electronic device 1000 is in an unfolded state, wherein the first shell 210 and the second shell 220 move away from each other to drive the display screen 300 to further unfold until the foldable electronic device 1000 is in an unfolded state.

[0147] 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 the assembly tolerance and the assembly gap 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 in 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 in 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 in 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 in the Y-axis direction. Of course, the same here can also allow a small amount of deviation (assembly and production tolerances).

[0148] See also Figure 2 and Figure 3The first shell 210 and the second shell 220 rotate relative to each other through the rotating mechanism 100. When the foldable electronic device 1000 is in the unfolded state, the display screen 300 has a large display area, realizing the large-screen display and operation functions of the foldable electronic device 1000, and improving the user experience. Figure 1 When the foldable electronic device 1000 is in a folded state, the display screen 300 is between the first shell 210 and the second shell 220. The first shell 210 and the second shell 220 protect the display surface of the display screen 300, which can greatly reduce the probability of the display screen 300 being damaged, and the overall size is reduced, which is easy to carry.

[0149] 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 based on the foldable electronic device 1000 in the attached Figure 2 and Figure 4 The display orientation is explained in the figure, with the positive direction of the Z axis being the "top" and "upper", the negative direction of the Z axis being the "bottom" and "lower", the positive direction of the X axis being the "right", the negative direction of the X axis being the "left", the positive direction of the Y axis being the "back", and the negative direction of the Y axis being the "front". It does not constitute a limitation on the orientation of the foldable electronic device 1000 in actual application scenarios.

[0150] See also Figure 4 and Figure 5 , Figure 4 yes Figure 3 Schematic diagram of the structure of the rotating mechanism of the foldable electronic device shown in. Figure 5 yes Figure 4 Schematic diagram of the exploded structure of the rotating mechanism shown in .

[0151] The rotating mechanism 100 includes a fixed assembly 10, a bearing base 20, a swing arm assembly 30, a synchronous assembly 40 and a damping assembly 50. The swing arm assembly 30, the synchronous assembly 40 and the damping assembly 50 are arranged at intervals along the Y-axis direction, one side of the swing arm assembly 30 is slidably and rotatably connected to the bearing base 20, and the other side of the swing arm assembly 30 is rotatably connected to the fixed assembly 10. One side of the synchronous assembly 40 is rotatably connected to the bearing base 20, and the other side of the synchronous assembly 40 is slidably and rotatably connected to the fixed assembly 10. One side of the damping assembly 50 is rotatably connected to the bearing base 20, and the other side of the damping assembly 50 is slidably and rotatably connected to the fixed assembly 10.

[0152] The fixing assembly 10 is connected to the first housing 210 and the second housing 220 respectively. When the fixing assembly 10 rotates relative to the bearing base 20, it drives the swing arm assembly 30 to slide and rotate relative to the bearing base 20, and drives the synchronization assembly 40 and the damping assembly 50 to rotate relative to the bearing base 20, thereby realizing the rotation of the rotating mechanism 100 to achieve the bending of the display screen 300. The synchronization assembly 40 makes the fixing assembly 10 rotate synchronously, thereby making the first housing 210 and the second housing 220 run synchronously. The damping assembly 50 provides a damping force during the rotation of the rotating mechanism 100.

[0153] It should be noted that Figure 4 and Figure 5 Only a partial structure of the rotating mechanism 100 along the positive direction of the Y-axis is shown. 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 bearing base 20. In other embodiments, between the two groups of substructures, an additional group of substructures is provided, and the additional substructure is located in the middle of the bearing base 20, so as to enhance the stability of the rotating mechanism 100. In other embodiments, one, four or five groups of the above-mentioned substructures may also be provided. The number of the substructures may be adjusted according to actual conditions. In one embodiment, the fixed components 10 of the two groups of the above-mentioned substructures may 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.

[0154] In a set of the above substructures, the fixing assembly 10 is installed in a receiving groove formed by the first receiving groove of the first housing 210 and the second receiving groove of the second housing 220. Specifically, the first fixing plate 11 is located in the first receiving groove and is fixedly connected to the cavity wall surface of the first receiving groove. The second fixing plate 12 is located in the second receiving groove and is fixedly connected to the cavity wall surface of the second receiving groove.

[0155] The fixing assembly 10 includes a first fixing plate 11 and a second fixing plate 12, and the first fixing plate 11 and the second fixing plate 12 are located on opposite sides of the bearing 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 bearing base 20, and the second fixing plate 12 is located on the other side of the bearing base 20. One side of the first main swing arm 31 is slidably and rotatably connected to the bearing 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 bearing base 20, and the other side of the second main swing arm 32 is rotatably connected to the second fixing plate 12.

[0156] 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.

[0157] One side of the first swing arm 41a and one side of the second swing arm 41b are slidably and rotatably connected to the bearing base 20, and 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 bearing base 20, and the other sides of the third swing arm 42a and the fourth swing arm 42b are rotatably connected to the second fixed plate 12. The synchronous slider 43 is installed on the bearing base 20, and one side of the synchronous slider 43 is rotatably connected to the first swing arm 41a and the second swing arm 41b, and the other side of the synchronous slider 43 is rotatably connected to the third swing arm 42a and the fourth swing arm 42b.

[0158] 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. One side of the first damping swing arm 51 is rotatably connected to the bearing base 20, and the other side of the first damping swing arm 51 is rotatably and slidably connected to the first fixing plate 11. One side of the second damping swing arm 52 is rotatably connected to the bearing base 20, and the other side of the second damping swing arm 52 is rotatably and slidably connected to the second fixing plate 12. The first sliding member 53, the second sliding member 54 and the elastic assembly 55 are installed on the bearing base 20.

[0159] During the rotation of the foldable electronic device, the damping assembly 50 can provide a damping force so that the user can experience a better damping feel, and at the same time, the foldable electronic device can be suspended at a preset angle, thereby improving the user's experience. The "preset angle" here refers to the angle between the first shell 210 and the second shell 220 when the foldable electronic device is suspended, that is, the angle between the first fixing plate 11 and the second fixing plate 12. The range of the preset angle is 0 to 180 degrees.

[0160] In this embodiment, when the first fixed plate 11 rotates relative to the bearing base 20, the first main swing arm 31 rotates relative to the first fixed plate 11, and the first main swing arm 31 slides and rotates relative to the bearing base 20. The first swing arm 41a and the second swing arm 41b slide and rotate relative to the first fixed plate 11, and the first swing arm 41a and the second swing arm 41b rotate relative to the bearing base 20. The first damping swing arm 51 slides and rotates relative to the first fixed plate 11, and the first damping swing arm 51 rotates relative to the bearing base 20; the second damping swing arm 52 slides and rotates relative to the second fixed plate 12, and the second damping swing arm 52 rotates relative to the bearing base 20. The first damping swing arm 51 and the second damping swing arm 52 make the first sliding member 53 and the second sliding member 54 move along the Y-axis direction to approach or move away from each other. When the first sliding member 53 and the second sliding member 54 approach each other, the two ends of the elastic component 55 are synchronously compressed by the first sliding member 53 and the second sliding member 54; when the first sliding member 53 and the second sliding member 54 move away from each other, the two ends of the elastic component 55 are synchronously released by the first sliding member 53 and the second sliding member 54, so that the elastic component 55 provides damping force for the first fixed plate 11. When the second fixed plate 12 rotates relative to the bearing base 20, the second main swing arm 32 rotates relative to the second fixed plate 12, and the second main swing arm 32 slides and rotates relative to the bearing base 20. The third swing arm 42a and the fourth swing arm 42b slide and rotate relative to the second fixed plate 12, and the third swing arm 42a and the fourth swing arm 42b rotate relative to the bearing base 20. The first sliding member 53 and the second sliding member 54 move along the Y-axis direction to approach or move away from each other. When the first sliding member 53 and the second sliding member 54 approach each other, the two ends of the elastic component 55 are synchronously compressed by the first sliding member 53 and the second sliding member 54; when the first sliding member 53 and the second sliding member 54 move away from each other, the two ends of the elastic component 55 are synchronously released by the first sliding member 53 and the second sliding member 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's experience. The synchronous slider 43 ensures the synchronization of the first synchronous swing arm 41 and the second synchronous swing arm 42, so as to achieve the synchronization of the rotation of the first fixed plate 11 and the second fixed plate 12, and then achieve the synchronization of the rotation of the first shell and the second shell.

[0161] See also Figure 6 , Figure 6 yes Figure 4 FIG. 1 is a schematic structural diagram of a fixing assembly 10 of a rotating mechanism 100 shown in FIG.

[0162] The first fixing plate 11 is in the shape of a long strip, and the length direction of the first fixing plate 11 is parallel to the Y-axis direction. 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 arranged opposite to each other along the Z-axis direction, the first side surface 11c and the second side surface 11d are arranged opposite to each other along the X-axis direction, and the first end surface 11f and the second end surface 11g are arranged opposite to each other along the Y-axis direction. The first side surface 11c, the second side surface 11d, the first end surface 11f, and the second end surface 11g are connected in sequence end to end, and the first side surface 11c, the second side surface 11d, the first end surface 11f, and the second end surface 11g are all connected between the first top surface 11a and the first bottom surface 11b.

[0163] The first fixed plate 11 is provided with a first rotating 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 rotating 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 direction. 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 direction.

[0164] 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 sides 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 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.

[0165] The first synchronous sliding groove 112 passes through the first side surface 11c and the second side surface 11d, that is, the first synchronous sliding groove 112 passes through the first fixing plate 11 along the X-axis direction. The first synchronous sliding groove 112 is used to install the first swing arm 41a and the second swing arm 41b.

[0166] The first damping chute 113 is formed by the first top surface 11a being recessed toward the first bottom surface 11b, and the first damping chute 113 at least partially penetrates the first bottom surface 11b. The second damping chute 114 is formed by the first top surface 11a being recessed toward the first bottom surface 11b, and at least a portion of the second damping chute 114 penetrates the first bottom surface 11b. The interval between the first damping chute 113 and the second damping chute 114 forms a first guide slide block 115, and the first guide slide block 115 is provided with a first guide slide groove 116 penetrating along the Y-axis direction, and the extension direction of the first guide slide groove 116 is parallel to the X-axis direction. The first guide slide groove 116 is connected to the first damping chute 113 and the second damping chute 114. The first avoidance groove 117 penetrates the first top surface 11a, the first bottom surface 11b and the first side surface 11c. The first avoidance groove 117 is connected 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 direction is greater than the sum of the sizes 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 so that the first guide groove 116 and the first avoidance groove 117 are connected along the Y-axis direction. The first damping groove 113 and the first avoidance groove 117 are sequentially distributed and connected along the X-axis, and 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 install 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 .

[0167] The structure of the second fixing plate 12 is similar to that of the first fixing plate 11. The second fixing plate 12 is in the shape of an elongated strip, and the length direction of the second fixing plate 12 is parallel to the Y-axis direction. The second fixing plate 12 includes a second top surface 12a, a second bottom surface 12b, a third side surface 12c, a fourth side surface 12d, a third end surface 12f and a fourth end surface 12g. The second top surface 12a and the second bottom surface 12b are arranged opposite to each other along the Z-axis direction, the third side surface 12c and the fourth side surface 12d are arranged opposite to each other along the X-axis direction, and the third end surface 12f and the fourth end surface 12g are arranged opposite to each other along the Y-axis direction. The third side surface 12c, the fourth side surface 12d, the third end surface 12f and the fourth end surface 12g are connected in sequence end to end, 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.

[0168] The second fixing plate 12 is provided with a second rotating groove 121 , a second synchronous sliding groove 122 , a third damping sliding groove 123 , a fourth damping sliding groove 124 and a second avoiding groove 127 .

[0169] The second rotation 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 rotation groove 121 passes through the second top surface 12a, the second bottom surface 12b and the third side surface 12c, that is, the second rotation groove 121 passes through the second fixed plate 12 along the Z-axis direction. The two groove sides of the second rotation 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 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 rotation 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.

[0170] 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.

[0171] The third damping chute 123 is formed by the second top surface 12a being recessed toward the second bottom surface 12b, and the third damping chute 123 at least partially penetrates the second bottom surface 12b. The fourth damping chute 124 is formed by the second top surface 12a being recessed toward the second bottom surface 12b, and at least a portion of the fourth damping chute 124 penetrates the second bottom surface 12b. The interval between the third damping chute 123 and the fourth damping chute 124 forms a second guide slider 125, and the second guide slider 125 is provided with a second guide chute 126 penetrating along the Y-axis direction, and the extension direction of the second guide chute 126 is parallel to the X-axis direction. The second guide chute 126 is connected to the third damping chute 123 and the fourth damping chute 124. The second avoidance groove 127 runs through the second top surface 12a, the second bottom surface 12b and the second side surface 11d. The second avoidance groove 127 is connected with 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 direction is greater than the sum of the sizes 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 direction. The third damping groove 123 and the second avoidance groove 127 are sequentially distributed and connected along the X-axis, and the fourth damping groove 124 and the second avoidance groove 127 are sequentially distributed and connected along the X-axis direction. 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 .

[0172] See also Figure 7 , Figure 7 yes Figure 4FIG. 1 is a schematic structural diagram of a supporting base 20 of a rotating mechanism 100 .

[0173] The bearing base 20 is in the shape of a long strip, and the length direction of the bearing base 20 is parallel to the Y-axis direction. The bearing base 20 can be an integrally formed structure. It can also include a bearing body 20a and a plurality of mounting blocks 20b. The bearing body 20a is provided with a recessed groove, and the extending direction of the recessed groove is parallel to the Y-axis direction. A plurality of mounting blocks 20b are fixed in the recessed groove to form the bearing base 20.

[0174] 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 .

[0175] It should be noted that the first part of the base and the second part of the base can be mirror-symmetrical to improve the symmetry of the bearing base 20, simplify the overall structure of the bearing base 20, improve the structural stability of the bearing base 20, and reduce the processing cost of the bearing base 20. Among them, the basic structure of each component in the second part of the base, the connection relationship between the components, and the connection relationship between the components and the components outside the assembly can all refer to the relevant description of the first part of the base.

[0176] The first base and the second base are respectively connected to one group of the above-mentioned substructures. In other embodiments, the first base and the second base can also be respectively connected to two groups of the above-mentioned substructures. Or the first base and the second base are jointly connected to three groups of the above-mentioned substructures. Those skilled in the art can make arrangements according to actual needs.

[0177] Figure 7 Schematic diagram of the structure of the first part of the supporting base 20 is shown in FIG.

[0178] The first part of the base of the bearing base 20 includes a bearing top surface 20c, a bearing bottom surface 20d, a first bearing side surface 20e and a second bearing side surface 20f. The bearing top surface 20c and the bearing bottom surface 20d are opposite to each other along the Z-axis direction, and the first bearing side surface 20e and the second bearing side surface 20f are opposite to each other along the X-axis direction. The first bearing side surface 20e is connected between one side of the bearing top surface 20c and the bearing bottom surface 20d, and the second bearing side surface 20f is connected between the other side of the bearing top surface 20c and the bearing bottom surface 20d.

[0179] 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 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.

[0180] The first main chute 21 is recessed toward the bearing bottom surface 20d for the bearing fixed surface, and is formed by penetrating the second bearing side surface 20f. At least part of the bottom surface of the first main chute 21 is arc-shaped, and the arc-shaped part of the bottom surface of the first main chute 21 extends in a direction parallel to the X-axis direction. The arc-shaped part of the bottom surface of the second main chute 22 facilitates the sliding of the first main swing arm 31 relative to the bearing base 20. The bottom surface of the first main chute 21 is provided with a first stopper 211, and the first stopper 211 is raised relative to the bottom surface of the first main chute 21. The first limit block 212 and the second limit block 213 are respectively provided on the two opposite sides of the groove of the first main chute 21 along the X-axis direction, and the first limit block 212 is raised relative to one side surface of the groove of the first main chute 21. The first limit block 212 is located in the first main chute 21, and there is a gap between the first limit block 212 and the bottom surface of the groove of the first main chute 21. The second limit block 213 is raised relative to the other side surface of the groove of the first main chute 21. The second limiting block 213 is located in 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 install the first main swing arm 31, and the first stop block 211, the first limiting block 212 and the second limiting block 213 are used to limit the first main swing arm 31 to prevent the first main swing arm 31 from sliding relative to the bearing base 20 and from being separated from the bearing base 20 when rotating.

[0181] The second main chute 22 is formed by the bearing top surface 20c being recessed toward the bearing bottom surface 20d and penetrating the first bearing side surface 20e. At least part of the groove bottom surface of the second main chute 22 is arc-shaped, and the arc-shaped part of the groove bottom surface of the second main chute 22 extends in a direction parallel to the X-axis direction. The arc-shaped part of the groove bottom surface of the second main chute 22 facilitates the sliding of the second main swing arm 32 relative to the bearing base 20. The groove bottom surface of the second main chute 22 is provided with a second stop block 221, and the second stop block 221 is raised relative to the groove bottom surface of the second main chute 22. The second main chute 22 is provided with a third limit block 222 and a fourth limit block 223 on two opposite groove sides along the X-axis direction, respectively, and the third limit block 222 is raised relative to one groove side surface of the second main chute 22. The third limit block 222 is located in the second main chute 22, and there is a gap between the third limit block 222 and the groove bottom surface of the second main chute 22. The fourth limiting block 223 is protruded relative to the other groove side surface of the second main slide groove 22. The fourth limiting block 223 is located in the second main slide groove 22 and is spaced apart from the groove bottom surface of the second main slide groove 22. The second main slide groove 22 is used to install the second main swing arm 32, and the second stop block 221, the third limiting block 222 and the fourth limiting block 223 are used to limit the second main swing arm 32 to prevent the second main swing arm 32 from sliding relative to the bearing base 20 and detaching from the bearing base 20 when rotating.

[0182] The first mounting groove 23 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 mounting hole 231 and a third mounting hole 232 are provided on one groove side surface of the first mounting groove 23, and a second mounting hole and a fourth mounting hole are provided on another groove side surface of the first mounting groove 23. The axial directions of the first mounting hole 231, the second mounting hole, the third mounting hole 232 and the fourth mounting hole are all parallel to the Y-axis direction. 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 groove side surface of the first mounting groove 23 is located on the bearing body 20a, and another part of the groove side surface of the first mounting groove 23 is located on a mounting block 20b matched with the bearing body 20a, and the mounting block 20b is detachably connected to the bearing body 20a. The second mounting hole and the fourth mounting hole are jointly formed by the mounting block 20b and the bearing body 20a. The first mounting hole 231, the second mounting hole, the third mounting hole 232 and the fourth mounting hole are used to connect the synchronization component 40.

[0183] A guide bar 233 is provided on the bottom surface of the first mounting groove 23. The guide bar 233 is raised relative to the bottom surface of the first mounting groove 23, and the length direction of the guide bar 233 is parallel to the Y-axis direction. The opposite ends of the guide bar 233 are respectively connected to the two opposite groove sides of the first mounting groove 23 along the X-axis direction. The first mounting groove 23 is used to install the first synchronous swing arm 41, the second synchronous swing arm 42 and the synchronous slider 43. The first mounting hole 231 and the second mounting hole are used to connect the first synchronous swing arm 41 and the synchronous slider 43. The third mounting hole 232 and the fourth mounting hole are used to connect the second synchronous swing arm 42 and the synchronous slider 43. The guide bar 233 is used to guide the movement of the synchronous slider 43 along the Y-axis direction to prevent the synchronous slider 43 from shaking when moving along the Y-axis direction, so that the movement of the synchronous slider 43 is more stable.

[0184] The second mounting groove 24 is formed by the bearing top surface 20c being recessed toward the bearing bottom surface 20d, and penetrating 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 groove side surface of the second mounting groove 24, and a second fastening hole and a fourth fastening hole are provided on another groove side surface 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. Among them, the first fastening hole 242 is connected with the first mounting hole 231, that is, the first fastening hole 242 and the first mounting hole 231 can be a through hole formed by the mounting block 20b and the 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 bearing body 20a. The first fastening hole 242, the second fastening hole, the third fastening hole 243 and the fourth fastening hole are used to connect the damping assembly 50.

[0185] A guide bar 241 is provided on the bottom surface of the second mounting groove 24. The guide bar 241 is raised relative to the bottom surface of the second mounting groove 24, and the length direction of the guide bar 241 is parallel to the Y-axis direction. The opposite ends of the guide bar 241 are respectively connected to the two opposite groove sides of the second mounting groove 24 along the X-axis direction. The second mounting groove 24 is used to install the damping assembly 50, that is, to install the first damping swing arm 51, the second damping swing arm 52, the first sliding member 53, the second sliding member 54 and the elastic assembly 55. The guide bar 241 is used to guide the movement of the first sliding member 53 and the second sliding member 54 along the Y-axis direction to prevent the first sliding member 53 and the second sliding member 54 from shaking when moving along the Y-axis direction, so as to make the movement of the first sliding member 53 and the second sliding member 54 more stable.

[0186] See also Figure 8 , Figure 8 yes Figure 4 FIG. 1 is a schematic structural diagram of the swing arm assembly 30 of the rotating mechanism 100 shown in FIG.

[0187] 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.

[0188] refer to Fig. 9 , and combined Figure 8 , Fig. 9 yes Figure 8 A schematic structural diagram of the first main swing arm 31 of the swing arm assembly 30 is shown in FIG.

[0189] 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 direction. In this embodiment, the first main sliding body 312 is fixedly connected to the first main rotating body 311.

[0190] The first main rotating body 311 is a generally rectangular thin plate structure, and is provided with a first through hole 313. The axial direction of the first through hole 313 is parallel to the Y-axis direction, and the first through hole 313 penetrates the first main rotating body 311 along the Y-axis direction. The first main rotating body 311 is used to cooperate with the first fixing plate 11, and the first through hole 313 is used to connect with the first fixing plate 11.

[0191] The first main sliding body 312 has a first sliding surface 314, and the first sliding surface 314 is arc-shaped. The first sliding surface 314 is provided with a first stop groove 315, and the first stop groove 315 is formed by the first sliding surface 314 being recessed. One groove side of the first stop groove 315 is a first stop surface, and the extension direction of the first stop surface is parallel to the Y-axis direction. The first stop surface is used to cooperate with the first stop block 211 in the first main sliding groove 21 of the bearing base 20 to prevent the first main swing arm 31 from being separated from the first main sliding groove 21. The first main sliding body 312 includes a first body 316, a first matching block 317 and a second matching block 318, and the first matching block 317 and the second matching block 318 are respectively fixedly connected to the two sides of the first body 316 opposite to each other along the Y-axis direction. The first matching block 317 and the second matching block 318 are both arc-shaped blocks, and the first matching block 317 and the second matching block 318 are recessed relative to the first body 316 on one side of the surface away from the first sliding surface 314.

[0192] The first main sliding body 312 is used to cooperate with the bearing base 20, and the arc-shaped first sliding surface 314 is used to cooperate with the arc-shaped portion of the bottom surface of the first main sliding groove 21, so that the first main swing arm 31 can slide and rotate smoothly. The first stop groove 315 is used to cooperate with the first stop block 211, the first matching block 317 is used to cooperate with the first limit block 212, and the second matching block 318 is used to cooperate with the second limit block 213, so as to prevent the first main sliding body 312 from being separated from the bearing base 20 when the first main swing arm 31 slides and rotates.

[0193] refer to Fig.10 , and combined Figure 8 , Fig.10 yes Figure 8 A schematic structural diagram of the second main swing arm 32 of the swing arm assembly 30 is shown in FIG.

[0194] 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 direction. In this embodiment, the second main sliding body 322 is fixedly connected to the second main rotating body 321 .

[0195] The second main rotating body 321 is a generally rectangular thin plate structure, and is provided with a second through hole 323. The axial direction of the second through hole 323 is parallel to the Y-axis direction, and the second through hole 323 penetrates the second main rotating body 321 along the Y-axis direction. The second main rotating body 321 is used to cooperate with the second fixing plate 12, and the second through hole 323 is used to connect with the second fixing plate 12.

[0196] The second main sliding body 322 has a second sliding surface 324, and the second sliding surface 324 is arc-shaped. A second stop groove 325 is provided on the second sliding surface 324, and the second stop groove 325 is formed by the second sliding surface 324 being recessed. One groove side of the second stop groove 325 is a second stop surface, and the extension direction of the second stop surface is parallel to the Y-axis direction. The second stop surface is used to cooperate with the second stop block 221 in the second main sliding groove 22 of the bearing base 20 to prevent the second main swing arm 32 from being separated from the second main sliding groove 22. The second main sliding body 322 includes a second body 326, a third matching block 327 and a fourth matching block 328, and the third matching block 327 and the fourth matching block 328 are respectively fixedly connected to the two sides of the second body 326 opposite to each other along the Y-axis direction. The third matching block 327 and the fourth matching block 328 are both arc-shaped blocks, and the side surfaces of the third matching block 327 and the fourth matching block 328 facing away from the second sliding surface 324 are recessed relative to the second body 326.

[0197] The second main sliding body 322 is used to cooperate with the bearing base 20, and the arc-shaped second sliding surface 324 is used to cooperate with the arc-shaped portion of the bottom surface of the second main sliding groove 22, so that the second main swing arm 32 can slide and rotate smoothly. The second stop groove 325 is used to cooperate with the second stop block 221, the third matching block 327 is used to cooperate with the third limit block 222, and the fourth matching block 328 is used to cooperate with the fourth limit block 223, so as to prevent the second main sliding body 322 from being separated from the bearing base 20 when the second main swing arm 32 slides and rotates.

[0198] At least a portion of the first fixed shaft 33 is located in the first through hole 313 of the first main rotating body 311, and two ends of the first fixed shaft 33 are respectively used to connect with the first fixing hole 118 and the second fixing hole, so that the first main swing arm 31 is rotatably connected to the first fixing plate 11. At least a portion of the second fixed shaft 34 is located in the second through hole 323 of the second main rotating body 321, and two ends of the second fixed shaft 34 are respectively used to connect with the third fixing hole 128 and the fourth fixing hole, so that the second main swing arm 32 is rotatably connected to the second fixing plate 12.

[0199] See also Fig.11 and Fig.12 , Fig.11 yes Figure 4 A schematic structural diagram of a synchronous assembly 40 of a rotating mechanism 100 is shown in FIG. Fig.12 yes Fig.11 A schematic diagram of the split structure of the synchronization component 40 is shown in FIG.

[0200] 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.

[0201] In this embodiment, the synchronization assembly 40 further includes a first installation shaft 44a, a second installation shaft 44b, a first pre-pressing member 45a, a second pre-pressing member 45b, a third pre-pressing member 45c, a fourth pre-pressing 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-pressing member 45a, the second pre-pressing member 45b, the third pre-pressing member 45c, and the fourth pre-pressing member 45d can all be disc springs or wave springs.

[0202] 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 part of them can be nuts and the other part can be retaining springs. For example, the first adjusting member 46a and the fourth adjusting member 47b are nuts, and the second adjusting member 47a and the third adjusting member 46b are retaining springs. In this embodiment, the first adjusting member 46a and the third adjusting member 46b are nuts, and the second adjusting member 47a and the fourth adjusting member 47b are retaining springs. The first pre-pressing member 45a provides a pre-tightening force between the first swing arm 41a and the synchronous slider 43, and the first adjusting member 46a is used to adjust the size of the pre-tightening force provided by the first pre-pressing member 45a. The second pre-pressing member 45b provides a pre-tightening force between the second swing arm 41b and the synchronous slider 43, and the second adjusting member 47a is used to adjust the size of the pre-tightening force provided by the second pre-pressing member 45b. The third pre-pressing member 45c provides a pre-tightening force between the third swing arm 42a and the synchronous slider 43, and the third adjusting member 46b is used to adjust the magnitude of the pre-tightening force provided by the third pre-pressing member 45c. The fourth pre-pressing member 45d provides a pre-tightening force between the fourth swing arm 42b and the synchronous slider 43, and the fourth adjusting member 47b is used to adjust the pre-tightening force provided by the fourth pre-pressing member 45d.

[0203] refer to Fig.13 , Fig.13 yes Fig.12 A schematic structural diagram of the first synchronous swing arm 41 of the synchronous assembly 40 is shown in FIG.

[0204] The first swing arm 41a includes a first swinging body 401a, a first connecting body 402a and a first spiral body 403a which are sequentially connected along the X-axis direction. The first swinging body 401a is in the shape of a thin plate, and a first clamping groove 404a arranged at intervals is provided on one side of the first swinging body 401a along the Y-axis direction, and a plurality of first clamping grooves 404a are arranged at intervals along the X-direction. The interval between any two adjacent first clamping grooves 404a is a first clamping block 405a. The first clamping groove 404a and the first clamping block 405a are both trapezoidal. In the present embodiment, the first clamping groove 404a and the first clamping block 405a are both isosceles trapezoidal. In other embodiments, the first clamping groove 404a and the first clamping block 405a are both right-angled trapezoidal. The long bottom side of the first clamping block 405a is aligned with the opening of the first clamping groove 404a, and the short bottom side of the first clamping block 405a is aligned with the bottom surface of the groove of the first clamping 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.

[0205] The first spiral body 403a is cylindrical, and is provided with a first through hole 406a and a first spiral mouth. The first through hole 406a penetrates the first spiral body 403a along the Y-axis direction. The first spiral body 403a includes a first inner peripheral surface 407a, a first outer peripheral surface 408a and a first end wall surface 409a. The first inner peripheral surface 407a is the hole wall surface of the first through hole 406a, the first outer peripheral surface 408a is away from the first inner peripheral surface 407a, and the first outer peripheral surface 408a is the outer surface of the first spiral body 403a. The first end wall surface 409a is connected between the first inner peripheral surface 407a and the first outer peripheral surface 408a. The first through hole 406a is a circular hole, and the aperture of the first through hole 406a is always consistent in the Y-axis direction; that is, in the Y-axis direction, the curvature of the first inner peripheral surface 407a is always consistent, and there is no local convexity or local concave. Thus, the first through hole 406a can be processed by a mold, and the first spiral body 403a can be processed by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0206] The first spiral opening is formed by penetrating part of the first inner peripheral surface 407a, part of the first outer peripheral surface 408a and part of the first end wall surface 409a. The first spiral opening has a first plane 410a and a first spiral surface 411a. The two sides of the first plane 410a are respectively connected to the first inner peripheral surface 407a and the first outer peripheral surface 408a, and the two opposite ends of the first plane 410a along the Y-axis direction are respectively connected to the first end wall surface 409a and the first spiral surface 411a. The first spiral surface 411a is a curved surface extending in a spiral. The two sides of the first spiral surface 411a are respectively connected to the first inner peripheral surface 407a and the first outer peripheral surface 408a, and the two ends of the first spiral surface 411a along the Y-axis direction are respectively connected to the first end wall surface 409a and the first plane 410a. The first spiral body 403a is used to cooperate with the bearing 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 .

[0207] The first connecting body 402a is roughly S-shaped. One side of the first connecting body 402a is fixedly connected to the first swinging body 401a, and the other side of the first connecting body 402a is fixedly connected to the first spiral body 403a, specifically connected to the first outer peripheral surface 408a of the first spiral body 403a. The first spiral mouth is located on the side of the first spiral body 403a away from the first connecting body 402a. The first connecting body 402a avoids the bearing base 20 so that the first spiral body 403a can extend from the bearing base 20 and then connect to the first fixed plate 11.

[0208] The second swing arm 41b includes a second swinging body 401b, a second connecting body 402b and a second spiral body 403b connected in sequence along the X-axis direction. The second swinging body 401b is in the shape of a thin plate, and a second clamping groove 404b arranged at intervals is provided on one side of the second swinging body 401b along the Y-axis direction, and a plurality of second clamping grooves 404b are arranged at intervals along the X-direction. The interval between any two adjacent second clamping grooves 404b is a second clamping block 405b. The second clamping groove 404b and the second clamping block 405b are both trapezoidal. In this embodiment, the second clamping groove 404b and the second clamping block 405b are both isosceles trapezoidal. In other embodiments, the second clamping groove 404b and the second clamping block 405b are both right-angled trapezoidal. The long bottom side of the second clamping block 405b is aligned with the opening of the second clamping groove 404b, and the short bottom side of the second clamping block 405b is aligned with the bottom surface of the groove of the second clamping 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.

[0209] The second spiral body 403b is cylindrical, and is provided with a second through hole 406b and a second spiral mouth. The second through hole 406b penetrates the second spiral body 403b along the Y-axis direction. The second spiral body 403b includes a second inner peripheral surface 407b, a second outer peripheral surface 408b, and a second end wall surface 409b. The second inner peripheral surface 407b is the hole wall surface of the second through hole 406b, and the second outer peripheral surface 408b is away from the second inner peripheral surface 407b. The second outer peripheral surface 408b is the outer surface of the second spiral body 403b. The second end wall surface 409b is connected between the second inner peripheral surface 407b and the second outer peripheral surface 408b. The second through hole 406b is a circular hole. In the Y-axis direction, the aperture of the second through hole 406b is always consistent; that is, in the Y-axis direction, the curvature of the second inner peripheral surface 407b is always consistent, and there is no bending. Thus, the second through hole 406b can be processed by a mold, and the second spiral body 403b can be processed by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0210] The second spiral opening is formed by penetrating part of the second inner peripheral surface 407b, part of the second outer peripheral surface 408b and part of the second end wall surface 409b. The second spiral opening has a second plane 410b and a second spiral surface 411b, and the spiral direction of the second spiral surface 411b is the same as that of the first spiral surface 411a. The two sides of the second plane 410b are respectively connected to the second inner peripheral surface 407b and the second outer peripheral surface 408b, and the two opposite ends of the second plane 410b along the Y-axis direction are respectively connected to the second end wall surface 409b and the second spiral surface 411b. The second spiral surface 411b is a curved surface extending in a spiral. The two sides of the second spiral surface 411b are respectively connected to the second inner peripheral surface 407b and the second outer peripheral surface 408b, and the two ends of the second spiral surface 411b along the Y-axis direction are respectively connected to the second end wall surface 409b and the second plane 410b. The second spiral body 403b is used to cooperate with the bearing 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 .

[0211] The second connecting body 402b is generally S-shaped. One side of the second connecting body 402b is fixedly connected to the second swinging body 401b, and the other side of the second connecting body 402b is fixedly connected to the second spiral body 403b, specifically to the second plane 410b of the second spiral body 403b. The second spiral opening is located on the side of the second spiral body 403b facing the second connecting body 402b.

[0212] refer to Fig.14 , Fig.14 yes Fig.12Schematic diagram of the structure of the second synchronous swing arm 42 of the synchronous assembly 40 is shown in FIG. The second synchronous swing arm 42 has the same structure as the first synchronous swing arm 41. The third swing arm 42a and the fourth swing arm 42b are detachably connected. In other embodiments, the second synchronous swing arm 42 may also have a different structure from the first synchronous swing arm 41. Specifically, the third swing arm 42a and the fourth swing arm 42b may be integrally formed.

[0213] The third swing arm 42a includes a third swinging body 421a, a third connecting body 422a and a third spiral body 423a connected in sequence along the X-axis direction. The third swinging body 421a is in the shape of a thin plate, and a third clamping groove 424a arranged at intervals is provided on one side of the third swinging body 421a along the Y-axis direction, and a plurality of third clamping grooves 424a are arranged at intervals along the X-direction. The interval between any two adjacent third clamping grooves 424a is a third clamping block 425a. The third clamping groove 424a and the third clamping block 425a are both trapezoidal. In this embodiment, the third clamping groove 424a and the third clamping block 425a are both isosceles trapezoidal. In other embodiments, the third clamping groove 424a and the third clamping block 425a are both right-angled trapezoidal. The long bottom side of the third clamping block 425a is aligned with the opening of the third clamping groove 424a, and the short bottom side of the third clamping block 425a is aligned with the bottom surface of the groove of the third clamping 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.

[0214] The third spiral body 423a is cylindrical, and is provided with a third through hole 426a and a third spiral mouth. The third through hole 426a penetrates the third spiral body 423a along the Y-axis direction. The third spiral body 423a includes a third inner peripheral surface 427a, a third outer peripheral surface 428a and a third end wall surface 429a. The third inner peripheral surface 427a is the hole wall surface of the third through hole 426a, the third outer peripheral surface 428a is away from the third inner peripheral surface 427a, and the third outer peripheral surface 428a is the outer surface of the third spiral body 423a. The third end wall surface 429a is connected between the third inner peripheral surface 427a and the third outer peripheral surface 428a. The third through hole 426a is a circular hole. In the Y-axis direction, the aperture of the third through hole 426a is always consistent; that is, in the Y-axis direction, the curvature of the third inner peripheral surface 427a is always consistent, and there is no bending. Thus, the third through hole 426a can be processed by a mold, and the third spiral body 423a can be processed by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0215] The third spiral opening is formed by penetrating part of the third inner peripheral surface 427a, part of the third outer peripheral surface 428a and part of the third end wall surface 429a. The third spiral opening has a third plane 430a and a third spiral surface 431A. The two sides of the third plane 430a are respectively connected to the third inner peripheral surface 427a and the third outer peripheral surface 428a, and the two opposite ends of the third plane 430a along the Y-axis direction are respectively connected to the third end wall surface 429a and the third spiral surface 431A. The third spiral surface 431A is a curved surface extending in a spiral. The two sides of the third spiral surface 431A are respectively connected to the third inner peripheral surface 427a and the third outer peripheral surface 428a, and the two opposite ends of the third spiral surface 431A along the Y-axis direction are respectively connected to the third end wall surface 429a and the third plane 430a. The third spiral body 423a is used to cooperate with the bearing 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 .

[0216] The third connecting body 422a is generally S-shaped. One side of the third connecting body 422a is fixedly connected to the third swinging body 421a, and the other side of the third connecting body 422a is fixedly connected to the third spiral body 423a, specifically to the third outer peripheral surface 428a of the third spiral body 423a. The third spiral opening is located on the side of the third spiral body 423a away from the third connecting body 422a.

[0217] The fourth swing arm 42b includes a fourth swinging body 421b, a fourth connecting body 422b and a fourth spiral body 423b connected in sequence along the X-axis direction. The fourth swinging body 421b is in the shape of a thin plate, and a fourth clamping groove 424b arranged at intervals is provided on one side of the fourth swinging body 421b along the Y-axis direction, and a plurality of fourth clamping grooves 424b are arranged at intervals along the X-direction. The interval between any two adjacent fourth clamping grooves 424b is a fourth clamping block 425b. The fourth clamping groove 424b and the fourth clamping block 425b are both trapezoidal. In the present embodiment, the fourth clamping groove 424b and the fourth clamping block 425b are both isosceles trapezoidal. In other embodiments, the fourth clamping groove 424b and the fourth clamping block 425b are both right-angled trapezoidal. The long bottom side of the fourth clamping block 425b is aligned with the opening of the fourth clamping groove 424b, and the short bottom side of the fourth clamping block 425b is aligned with the bottom surface of the fourth clamping groove 424b. The fourth swinging body 421b is used to cooperate with the second fixing plate 12, and the fourth clamping groove 424b and the fourth clamping block 425b are used to cooperate with the third swing arm 42a.

[0218] The fourth spiral body 423b is cylindrical, and is provided with a fourth through hole 426b and a fourth spiral mouth. The fourth through hole 426b penetrates the fourth spiral body 423b along the Y-axis direction. The fourth spiral body 423b includes a fourth inner peripheral surface 427b, a fourth outer peripheral surface 428b and a fourth end wall surface. The fourth inner peripheral surface 427b is the hole wall surface of the fourth through hole 426b, the fourth outer peripheral surface 428b is away from the fourth inner peripheral surface 427b, and the fourth outer peripheral surface 428b is the outer surface of the fourth spiral body 423b. The fourth end wall surface is connected between the fourth inner peripheral surface 427b and the fourth outer peripheral surface 428b. The fourth through hole 426b is a circular hole. In the Y-axis direction, the aperture of the fourth through hole 426b is always consistent; that is, in the Y-axis direction, the curvature of the fourth inner peripheral surface 427b is always consistent, and there is no bending or the like. Thus, the fourth through hole 426b can be processed by a mold, and the fourth spiral body 423b can be processed by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0219] The fourth spiral opening is formed by penetrating part of the fourth inner peripheral surface 427b, part of the fourth outer peripheral surface 428b and part 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 the spiral direction of the third spiral surface 431A. The two sides of the fourth plane are respectively connected to the fourth inner peripheral surface 427b and the fourth outer peripheral surface 428b, and the two opposite ends of the fourth plane along the Y-axis direction are respectively connected to the fourth end wall and the fourth spiral surface 431B. The fourth spiral surface 431B is a curved surface extending in a spiral. The two sides of the fourth spiral surface 431B are respectively connected to the fourth inner peripheral surface 427b and the fourth outer peripheral surface 428b, and the two opposite ends of the fourth spiral surface 431B along the Y-axis direction are respectively connected to the fourth end wall and the fourth plane. The fourth spiral body 423b is used to cooperate with the bearing 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 .

[0220] The fourth connector 422b is roughly S-shaped. One side of the fourth connector 422b is fixedly connected to the fourth swinging body 421b, and the other side of the fourth connector 422b is fixedly connected to the fourth spiral 423b, specifically to the fourth plane of the fourth spiral 423b. The fourth spiral opening is located on the side of the fourth spiral 423b facing the fourth connector 422b.

[0221] refer to Fig.15 , Fig.15 yes Fig.12 A schematic structural diagram of a synchronization slider 43 of a synchronization assembly 40 is shown in FIG.

[0222] 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 both sides of the synchronous body 431 along the X-axis direction, the first connecting block 434 and the second connecting block 435 are located on both sides of the synchronous body 431 along the X-axis direction, and 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.

[0223] The synchronization body 431 is roughly in the shape of a rectangular block, and includes a first synchronization surface 431a and a second synchronization surface 431b opposite to each other along the Z-axis direction, and a first synchronization side surface 431c opposite to each other along the X-axis direction. The first synchronization side surface is connected between one side of the first synchronization surface 431a and one side of the second synchronization surface 431b, and the second synchronization side surface 431c is connected between the other side of the first synchronization surface 431a and the other side of the second synchronization surface 431b. The first synchronization side surface and the second synchronization side surface 431c are both inclined arc-shaped surfaces. The first synchronization side surface and the second synchronization side surface 431c are both inclined relative to the central axis of the synchronization slider 43 along the Z-axis direction, and the inclination direction of the first synchronization side surface and the second synchronization side surface 431c are both away from the central axis of the synchronization slider 43 along the axial direction.

[0224] The synchronous 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 passes through the first synchronous side surface and the second synchronous surface 431b, and the second ejection groove 431d passes through the second synchronous side surface 431c and the second synchronous surface 431b. The first ejection groove and the second ejection groove 431d are both roughly triangular. The first ejection groove and the second ejection groove 431d facilitate the use of mold processing for the synchronous slider 43. The guide groove 431e is formed by the second synchronous surface 431b being recessed in the direction of the first synchronous surface 431a. The guide groove 431e passes through the synchronous body 431 along the Y-axis direction. The guide groove 431e is used to cooperate with the guide bar 233 so that the synchronous slider 43 slides along the Y-axis direction under the guidance of the guide bar 233, thereby increasing the sliding stability of the synchronous slider 43.

[0225] The first spiral block 432 is formed along the first synchronous side protrusion, and the first spiral block 432 is provided with a first through hole 432a extending along the Y-axis direction. 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 matching surface 432e and a second matching surface 432f. The first connecting surface and the second connecting surface 432b are opposite to each other along the Y-axis direction, and the first connecting surface and the second connecting surface 432b are both planes, and the first through hole 432a penetrates the first connecting surface and the second connecting surface 432b. The first inner wall surface 432c and the first outer wall surface 432d are both arc-shaped surfaces, a part of the first inner wall surface 432c is the hole wall surface of the first through hole 432a, the first outer wall surface 432d is away from the first inner wall surface 432c, and the first outer wall surface 432d is the outer surface of the first spiral block 432.

[0226] The first mating surface 432e and the second mating surface 432f both extend in an axial spiral around the first through hole 432a, and the spiral directions of the first mating surface 432e and the second mating surface 432f are the same. The first mating surface 432e and the second mating surface 432f are located on opposite sides of the first through hole 432a along the Y-axis direction. The first mating surface 432e is connected to the first inner wall surface 432c and the first outer wall surface 432d at opposite sides along the extension direction, and the first two ends of the first mating surface 432e are connected to the first synchronous side surface and the first connecting surface at opposite sides along the extension direction. The second mating surface 432f is connected to the first inner wall surface 432c and the first outer wall surface 432d at opposite sides along the extension direction, and the first two ends of the second mating surface 432f are connected to the first synchronous side surface and the second connecting surface 432b at opposite sides along the Y-axis direction. 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.

[0227] The portion of the first inner wall surface 432c of the hole wall surface of the first through hole 432a and the rest of the first inner wall surface 432c are connected in the Y-axis direction, and the portion of the first inner wall surface 432c of the hole wall surface of the first through hole 432a and the rest of the first inner wall surface 432c are bent in the same arc along the X-axis direction. That is, the first through hole 432a is a circular hole, and the aperture remains unchanged. Thus, when the first through hole 432a is processed by the mold, it can be demolded along the Y-axis direction, and the first through hole 432a is processed by the mold, and the first mating surface 432e and the first through hole 432a can be processed synchronously. The second mating surface 432f is flush with the groove wall surface of the first demolding groove in the Z-axis direction. When the second mating surface 432f is processed by the mold, it can be demolded along the Z-axis direction, and the second mating surface 432f is processed by the mold. Thus, the first spiral block 432 can be made using a mold.

[0228] The second spiral block 433 has the same structure as the first spiral block 432, and the first spiral block 432 and the second spiral block 433 are symmetrical relative to the synchronous body 431. The second spiral block 433 is formed along the second synchronous side surface 431c, and the second spiral block 433 is provided with a second through hole 433a extending along the Y-axis direction. The second spiral block 433 includes a third connecting surface (not shown), a fourth connecting surface 433b, a second inner wall surface 433c, a second outer wall surface 433d, a third matching surface 433e and a fourth matching surface 433f. The third connecting surface and the fourth connecting surface 433b are opposite to each other along the Y-axis direction, and the third connecting surface and the fourth connecting surface 433b are both planes. The second through hole 433a penetrates the third connecting surface and the fourth connecting surface 433b. The second inner wall surface 433c and the second outer wall surface 433d are both arc-shaped surfaces, a part of the second inner wall surface 433c is the hole wall surface of the second through hole 433a, and the second outer wall surface 433d is away from the second inner wall surface 433c.

[0229] The third mating surface 433e and the fourth mating surface 433f both extend in an axial spiral around the second through hole 433a, and the spiral directions of the third mating surface 433e and the fourth mating surface 433f are the same. The third mating surface 433e and the fourth mating surface 433f are located on opposite sides of the second through hole 433a along the Y-axis direction. The third mating surface 433e is connected to the second inner wall surface 433c and the second outer wall surface 433d on opposite sides along the extension direction, and the two ends of the third mating surface 433e in the extension direction are connected to the second synchronous side surface 431c and the third connecting surface on opposite sides along the extension direction. The fourth mating surface 433f is connected to the second inner wall surface 433c and the second outer wall surface 433d on opposite sides along the extension direction, and the two ends of the fourth mating surface 433f in the Y-axis direction are connected to the second synchronous side surface 431c and the fourth connecting surface 433b on opposite sides along the extension direction. 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.

[0230] The portion of the second inner wall surface 433c of the hole wall surface of the second through hole 433a and the rest of the second inner wall surface 433c are connected in the Y-axis direction, and the portion of the second inner wall surface 433c of the hole wall surface of the second through hole 433a and the rest of the second inner wall surface 433c are bent in the same arc along the X-axis direction. That is, the second through hole 433a is a circular hole, and the aperture remains unchanged. Thus, when the second through hole 433a is processed by the mold, it can be demolded along the Y-axis direction, and the second through hole 433a is processed by the mold, and the third mating surface 433e is processed synchronously with the second through hole 433a. The fourth mating surface 433f is flush with the groove wall surface of the second demolding groove 431d in the Z-axis direction. When the fourth mating surface 433f is processed by the mold, it can be demolded along the Z-axis direction, and the fourth mating surface 433f is processed by the mold. Thus, the second spiral block 433 can be made using a mold.

[0231] The first connection block 434 is formed to be raised along the first synchronous side surface, and is provided with a first through hole 434a, which penetrates the first connection block 434 along the Y-axis direction. The second connection block 435 is formed to be raised along the second synchronous side surface 431c, and is provided with a second through hole 435a, which penetrates the second connection block 435 along the Y-axis direction. The first through hole 434a is coaxial with the first through hole 432a, and the second through hole 435a is coaxial with the second through hole 433a. The first through hole 434a and the first through hole 432a are used to cooperate with the first installation shaft 44a, and the second through hole 435a and the second through hole 433a are used to cooperate with the second installation shaft 44b.

[0232] refer to Fig.16 and Fig.17 , Fig.16 yes Figure 4 A schematic structural diagram of the damping assembly 50 of the rotating mechanism 100 is shown in FIG. Fig.17 yes Fig.16 A schematic diagram of the split structure of the damping assembly 50 is shown in FIG.

[0233] 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.

[0234] 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.

[0235] refer to Fig.18 , Fig.18 yes Fig.17 A schematic structural diagram of the first damping swing arm 51 of the damping assembly 50 is shown in FIG.

[0236] The first damping swing arm 51 includes a first sliding body 511 and a first rotating body 512 fixedly connected along the X-axis direction. The first sliding body 511 is used for sliding and rotatingly connecting the first fixed plate 11, and the first rotating body 512 is used for rotatingly connecting the first sliding member 53, the second sliding member 54 and the bearing base 20.

[0237] The first sliding body 511 is in the shape of a thin plate, and includes a first connecting arm 513, a first sliding arm 514, a second sliding arm 515, a first sliding cylinder 516, and a second sliding cylinder 517. The first connecting arm 513 is in the shape of a long strip plate, and the length direction of the first connecting arm 513 is parallel to the Y-axis direction. The first sliding arm 514 and the second sliding arm 515 are both in the shape of a rectangular plate, and the length directions of the first sliding arm 514 and the second sliding arm 515 are both parallel to the X-axis direction. The width dimension of the first sliding arm 514 and the second sliding arm 515 along the Y-axis direction is smaller than the length dimension of the first connecting arm 513 along the Y-axis direction.

[0238] The first sliding arm 514 and the second sliding arm 515 are both fixedly connected to one side of the first connecting arm 513. The first sliding arm 514 and the second sliding arm 515 are arranged at intervals along the Y-axis 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.

[0239] 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 rotating cylinder 512a and the second rotating cylinder 512b are both fixedly connected to the side of the first connecting arm 513 away from the first sliding arm 514 and the second sliding arm 515. The first rotating cylinder 512a and the second rotating cylinder 512b are arranged at intervals along the Y-axis direction, and the first rotating cylinder 512a, the second rotating cylinder 512b and the first connecting arm 513 are arranged in a U shape. The axial directions of the first rotating hole 512e and the second rotating hole 512f are both parallel to the Y-axis direction, and the first rotating hole 512e and the second rotating hole 512f are coaxial. The first concave cam 512c is fixedly connected to a side of the first rotating cylinder 512a and is coaxial with the first rotating hole 512e. The second concave cam 512d has the same structure as the first concave cam 512c. The second concave cam 512d is fixedly connected to 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 marked in the figure) and a plurality of first protrusions (not marked in the figure), 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 marked in the figure) and a plurality of second protrusions (not marked in the figure), and the plurality of second recesses and the plurality of second protrusions are alternately distributed.

[0240] refer to Fig.19 , Fig.19 yes Fig.17 A schematic structural diagram of the second damping swing arm 52 of the damping assembly 50 is shown in FIG.

[0241] The second damping swing arm 52 has the same structure as the first damping swing arm 51. The second damping swing arm 52 includes a second sliding body 521 and a second rotating body 522 fixedly connected along the X-axis direction. The second sliding body 521 is used for sliding and rotatingly connecting the second fixed plate 12, and the second rotating body 522 is used for rotatingly connecting the first sliding member 53, the second sliding member 54 and the bearing base 20.

[0242] The second sliding body 521 is in the shape of a thin plate, and includes a second connecting arm 523, a third sliding arm 524, a fourth sliding arm 525, a third sliding cylinder 526, and a fourth sliding cylinder 527. The second connecting arm 523 is in the shape of a long strip plate, and the length direction of the second connecting arm 523 is parallel to the Y-axis direction. The third sliding arm 524 and the fourth sliding arm 525 are both in the shape of a rectangular plate, and the length directions of the third sliding arm 524 and the fourth sliding arm 525 are both parallel to the X-axis direction. The width dimension of the third sliding arm 524 and the fourth sliding arm 525 along the Y-axis direction is smaller than the length dimension of the second connecting arm 523 along the Y-axis direction.

[0243] 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 arranged at intervals along the Y-axis direction. 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 is provided with a third sliding hole 526a, and the fourth sliding cylinder 527 is provided with 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 direction, and the third sliding hole 526a and the fourth sliding hole 527a are coaxial. The third sliding hole 526a and the fourth sliding hole 527a are used to cooperate with the second connecting shaft.

[0244] 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. The third rotating cylinder 522a and the fourth rotating cylinder 522b are both fixedly connected to the side of the second connecting arm 523 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 arranged at intervals along the Y-axis direction, and the third rotating cylinder 522a, the fourth rotating cylinder 522b and the second connecting arm 523 are arranged in a U shape. The axial directions of the third rotating hole 522e and the fourth rotating hole 522f are both parallel to the Y-axis direction, and the third rotating hole 522e and the fourth rotating hole 522f are coaxial. 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 marked in the figure) and a plurality of third protrusions (not marked in the figure), and the plurality of third recesses and the plurality of third protrusions are alternately distributed. The fourth concave cam 522d includes a plurality of fourth recesses (not marked in the figure) and a plurality of fourth protrusions (not marked in the figure), and the plurality of fourth recesses and the plurality of fourth protrusions are alternately distributed.

[0245] refer to Fig. 20 , Fig. 20 yes Fig.17 A schematic structural diagram of the first sliding member 53 of the damping assembly 50 is shown in FIG.

[0246] The first sliding member 53 includes a first slider 531, a first matching wheel 532 and a third matching 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 arranged at intervals along the X direction. The first connecting hole 534, the fifth connecting hole 536, the seventh connecting hole 537 and the third connecting hole 535 all penetrate the first slider 531 along the Y-axis direction. The first matching wheel 532 and the third matching wheel 533 have the same structure and are both fixedly connected to a surface of the first slider 531. The first matching wheel 532 is coaxial with the first connecting hole 534, and the third matching wheel 533 is coaxial with the third connecting hole 535. The first matching wheel 532 includes a plurality of first matching recesses (not marked in the figure) and a plurality of first matching protrusions (not marked in the figure), and the plurality of first matching recesses and the plurality of first matching protrusions are alternately distributed. The third matching wheel 533 includes a plurality of third matching recesses (not marked in the figure) and a plurality of third matching protrusions (not marked in the figure), and the plurality of third matching recesses and the plurality of third matching protrusions are alternately distributed. A first guide groove 538 is provided on one side of the first slider 531, and the first guide groove 538 penetrates the first slider 531 along the Y-axis direction, and the extension direction of the first guide groove 538 is parallel to the Y-axis direction. The first matching wheel 532 is used to match with the first concave cam 512c, and the third matching wheel 533 is used to match with the third concave cam 522c. The first connecting hole 534 is used to match with the first connecting rod 56a, the third connecting hole 535 is used to match with the second connecting rod 56b, the fifth connecting hole 536 is used to match with the third connecting rod 56c, and the seventh connecting hole 537 is used to match with the fourth connecting rod 56d. The first guide groove 538 is used to match with the guide bar 241 to guide the movement of the first slider 531 along the Y-axis direction to prevent the first slider 531 from shaking when moving along the Y-axis direction, so as to make the movement of the first sliding member 53 more stable.

[0247] refer to Fig.21 , Fig.21 yes Fig.17 A schematic structural diagram of the second sliding member 54 of the damping assembly 50 is shown in FIG.

[0248] The structure of the second sliding member 54 is the same as that of the first sliding member 53. The second sliding member 54 includes a second slider 541, a second matching wheel 542 and a fourth matching wheel 543. The second slider 541 is provided with a second connection hole 544, a sixth connection hole 546, an eighth connection hole 547 and a fourth connection hole 545 arranged at intervals along the X-axis direction. The second connection hole 544, the sixth connection hole 546, the eighth connection hole 547 and the fourth connection hole 545 all penetrate the second slider 541 along the Y-axis direction. The second matching wheel 542 and the fourth matching wheel 543 have the same structure and are both fixedly connected to a surface of the second slider 541. The second matching wheel 542 is coaxial with the second connection hole 544, and the fourth matching wheel 543 is coaxial with the fourth connection hole 545. The second matching wheel 542 includes a plurality of second matching recesses (not marked in the figure) and a plurality of second matching protrusions (not marked in the figure), and the plurality of second matching recesses and the plurality of second matching protrusions are alternately distributed. The fourth matching wheel 543 includes a plurality of fourth matching recesses (not marked in the figure) and a plurality of fourth matching protrusions (not marked in the figure), and the plurality of fourth matching recesses and the plurality of fourth matching protrusions are alternately distributed. A second guide groove 548 is provided on one side of the second slider 541, and the second guide groove 548 penetrates the second slider 541 along the Y-axis direction, and the extension direction of the second guide groove 548 is parallel to the Y-axis direction. The second matching wheel 542 is used to match with the second concave cam 512d, and the fourth matching wheel 543 is used to match with the fourth concave cam 522d. The second connecting hole 544 is used to match with the first connecting rod 56a, the fourth connecting hole 545 is used to match with the second connecting rod 56b, the sixth connecting hole 546 is used to match with the third connecting rod 56c, and the eighth connecting hole 547 is used to match 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 second sliding member 54 can move more stably.

[0249] In this embodiment, reference Figure 5 The first fixing plate 11 and the second fixing plate 12 are respectively located on two opposite sides of the supporting base 20 .

[0250] refer to Figure 4 , Figure 8 and Fig. 9The 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 matching block 317 of the first main sliding body 312 is located in the gap between the first limiting block 212 and the groove bottom surface of the first main slide groove 21, and the second matching block 318 is located in the gap between the second limiting block 213 and the groove bottom surface of the first main slide groove 21; when the first main sliding body 312 slides and rotates, the first matching block 317 and the second matching block 318 limit the movement of the first main sliding body 312 along the Z-axis direction, preventing the first main sliding body 312 from escaping from the first main slide groove 21 along the Z-axis direction. The first stop block 211 in the first main slide groove 21 of the supporting base 20 is located in the first stop groove 315 of the first main sliding body 312. When the first main sliding body 312 slides and rotates relative to the supporting base 20, the first stop block 211 abuts against the first stop surface of the first stop groove 315 to prevent the first main sliding body 312 from sliding out of the first main slide groove 21 along the X-axis direction.

[0251] At least part of the first main rotating body 311 of the first main swing arm 31 is located in the first rotating groove 111 of the first fixing plate 11, and the first fixing hole 118, the first through hole 313 and the second fixing hole are coaxial. The first fixing shaft 33 passes through the first through hole 313, and the opposite ends of the first fixing shaft 33 are respectively fixed in the first fixing hole 118 and the second fixing hole, so that the first main rotating body 311 can rotate around the first fixing shaft 33, thereby realizing the rotation of the first main swing arm 31 relative to the first fixing plate 11.

[0252] refer to Figure 4 , Figure 8 and Fig.10The second main swing arm 32 is rotatably connected to the bearing base 20. Specifically, at least a portion of the second main sliding body 322 of the second main swing arm 32 is located 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 matching block 327 of the second main sliding body 322 is located in the interval between the third limiting block 222 and the groove bottom surface of the second main sliding groove 22, and the fourth matching block 328 is located in the interval between the fourth limiting block 223 and the groove bottom surface of the second main sliding groove 22. When the second main sliding body 322 slides and rotates, the third matching block 327 and the fourth matching block 328 limit the movement of the second main sliding body 322 along the Z-axis direction, preventing the second main sliding body 322 from escaping from the second main sliding groove 22 along the Z-axis direction. The second stop block 221 in the second main sliding groove 22 of the bearing base 20 is located in the second stop groove 325 of the second main sliding body 322. When the second main sliding body 322 slides and rotates relative to the bearing base 20, the second stop block 221 abuts against the second stop surface of the second stop groove 325, preventing the second main sliding body 322 from sliding out of the second main sliding groove 22 along the X-axis direction.

[0253] At least part of the second main rotating body 321 of the second main swing arm 32 is located in the second rotating groove 121 of the second fixed plate 12, and the third fixing hole 128, the second through hole 323 and the fourth fixing hole are coaxial. The second fixed shaft 34 passes through the second through hole 323, and the opposite ends of the second fixed shaft 34 are respectively fixed in the third fixing hole 128 and the fourth fixing hole, so that the second main rotating body 321 can rotate around the second fixed shaft 34, thereby realizing the rotation of the second main swing arm 32 relative to the second fixed plate 12.

[0254] In this embodiment, reference Fig.11 and Fig.12, the first adjusting member 46a, the first pre-pressing member 45a, the first spiral body 403a, the portion of the first spiral block 432 provided with the first through hole 432a, the second spiral body 403b, the second pre-pressing member 45b, the second adjusting member 47a and the first connecting block 434 are located on the same side of the synchronous body 431 and are arranged in sequence along the Y-axis direction. The first adjusting member 46a is a nut, and the threaded hole of the first adjusting member 46a, the hollow portion of the first pre-pressing member 45a, the first through hole 406a of the first spiral body 403a, the first through hole 432a of the first spiral block 432, the second through hole 406b of the second spiral body 403b, the hollow portion of the second pre-pressing 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 installation shaft 44a sequentially passes through the threaded hole of the first adjustment member 46a, the hollow part of the first pre-pressing member 45a, the first through hole 406a of the first spiral body 403a, the first through hole 432a of the first spiral block 432, the second through hole 406b of the second spiral body 403b, the hollow part of the second pre-pressing member 45b, the hollow part of the second adjustment member 47a, and the first through hole 434a of the first connecting block 434. Both the first spiral body 403a and the second spiral body 403b can rotate around the first installation shaft 44a.

[0255] 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 through 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.

[0256] In other embodiments, the first swing arm 41a and the second swing arm 41b can be connected by an elastic buckle. Specifically, an elastic buckle is provided on one side of the first swing arm 41a, and an inner groove is provided on one side of the second swing arm 41b, and the elastic buckle is connected to the inner groove to achieve a detachable connection between the first swing arm 41a and the second swing arm 41b.

[0257] 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. Part of the first spiral block 432 of the synchronous slider 43 is located in the first spiral mouth of the first spiral body 403a, and the first spiral surface 411a of the first spiral body 403a cooperates with the first matching surface 432e of the synchronous slider 43. The first spiral surface 411a faces the first matching surface 432e, and at least part of the first spiral surface 411a abuts against the first matching surface 432e. The first end wall surface 409a of the first spiral body 403a abuts against the first connecting surface of the first spiral block 432.

[0258] The second spiral body 403b cooperates with the first spiral block 432 and the synchronous body 431 of the synchronous slider 43, respectively. Specifically, the second outer peripheral surface 408b of the second spiral body 403b faces the first synchronous side surface, and the second spiral body 403b can slide along the first synchronous side surface. Another part of the first spiral block 432 of the synchronous slider 43 is located in the second spiral mouth of the second spiral body 403b, and the second spiral surface 411b of the second spiral body 403b cooperates with the second matching surface 432f of the synchronous slider 43. The second spiral surface 411b faces the second matching surface 432f, and at least part of the second spiral surface 411b abuts against the second matching 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 the second end wall surface 409b and the second connecting surface 432b are spaced apart in the Y-axis direction.

[0259] The third adjusting member 46b, the third pre-pressing member 45c, the third spiral body 423a, the portion of the second spiral block 433 provided with the second through hole 433a, the fourth spiral body 423b, the fourth pre-pressing member 45d, the fourth adjusting member 47b and the second connecting block 435 are located on the same side of the synchronous body 431 and are arranged in sequence along the Y-axis direction. The third adjusting member 46b is a nut, and the threaded hole of the third adjusting member 46b, the hollow portion of the third pre-pressing member 45c, the third through hole 426a of the third spiral body 423a, the second through hole 433a of the second spiral block 433, the fourth through hole 426b of the fourth spiral body 423b, the hollow portion of the third pre-pressing 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 installation shaft 44b sequentially passes through the threaded hole of the third adjustment member 46b, the hollow part of the third pre-pressing member 45c, the third through hole 426a of the third spiral body 423a, the second through hole 433a of the second spiral block 433, the fourth through hole 426b of the fourth spiral body 423b, the hollow part of the fourth pre-pressing member 45d, the hollow part of the fourth adjustment member 47b, and the second through hole 435a of the second connecting block 435. The third spiral body 423a and the fourth spiral body 423b can rotate around the second installation shaft 44b.

[0260] The third swing body 421a of the third swing arm 42a cooperates with the fourth swing body 421b of the fourth swing arm 42b. One of the third swing arm 42a and the fourth swing arm 42b is provided with a snap-in groove, and the other of the third swing arm 42a and the fourth swing arm 42b is provided with a snap-in block; the snap-in block is snap-into the snap-in groove. The third swing arm 42a and the fourth swing arm 42b are detachably connected through 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 third snap-in block 425a of the third swing body 421a is located in the fourth snap-in groove 424b of the fourth swing body 421b, and the fourth snap-in block 425b of the fourth swing body 421b is located in the third snap-in groove 424a of the third swing 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.

[0261] In other embodiments, an elastic buckle is provided on one side of the third swing arm 42a, and the elastic buckle is the above-mentioned clamping block. An inner groove is provided on one side of the fourth swing arm 42b, and the inner groove is the above-mentioned clamping groove. The elastic buckle is clamped in the inner groove, so that the third swing arm 42a and the fourth swing arm 42b can be detachably connected.

[0262] The third spiral body 423a cooperates with the second spiral block 433 and the synchronous body 431 of the synchronous slider 43, respectively. Specifically, the third outer peripheral surface 428a of the third spiral body 423a faces the second synchronous side surface 431c, and the third spiral body 423a can slide along the second synchronous side surface 431c. Part of the second spiral block 433 of the synchronous slider 43 is located in the third spiral mouth of the third spiral body 423a, and the third spiral surface 431A of the third spiral body 423a cooperates with the third matching surface 433e of the synchronous slider 43. The third spiral surface 431A faces the third matching surface 433e, and at least part of the third spiral surface 431A abuts against the third matching surface 433e. The third end wall surface 429a of the third spiral body 423a abuts against the third connecting surface of the second spiral block 433.

[0263] The fourth spiral body 423b cooperates with the second spiral block 433 and the synchronous body 431 of the synchronous slider 43, respectively. Specifically, the fourth outer peripheral surface 428b of the fourth spiral body 423b faces the second synchronous side surface 431c, and the fourth spiral body 423b can slide along the second synchronous side surface 431c. Another part of the second spiral block 433 of the synchronous slider 43 is located in the fourth spiral mouth of the fourth spiral body 423b, and the fourth spiral surface 431B of the fourth spiral body 423b cooperates with the fourth matching surface 433f of the synchronous slider 43. The fourth spiral surface 431B faces the fourth matching surface 433f, and at least part of the fourth spiral surface 431B abuts against the fourth matching surface 433f. The fourth end wall surface of the fourth spiral body 423b faces the fourth connecting surface 433b of the second spiral block 433, and the fourth end wall surface and the fourth connecting surface 433b are spaced apart in the Y-axis direction.

[0264] In this embodiment, reference Figure 4 , Fig.11 and Fig.12The first spiral body 403a of the first swing arm 41a, the second spiral body 403b of the second swing arm 41b, the third spiral body 423a of the third swing arm 42a, the fourth spiral body 423b of the fourth swing arm 42b, the synchronous slider 43, the first installation shaft 44a, the second installation 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 adjustment member 46a, the third adjustment member 46b, the second adjustment member 47a and the fourth adjustment member 47b are all located in the first installation groove 23 of the bearing base 20. The guide bar 233 in the first installation groove 23 is at least partially located in the guide groove 431e of the synchronous body 431. The first spiral body 403a, the second spiral body 403b, the third spiral body 423a and the third spiral body 423a can all slide and rotate relative to the synchronous slider 43, and the synchronous slider 43 slides along the guide bar 233 to make the first spiral body 403a, the second spiral body 403b, the third spiral body 423a and the third spiral body 423a move synchronously. One end of the synchronous slider 43 along the Y-axis direction is aligned with the first spiral body 403a of the first swing arm 41a and the third spiral body 423a of the third swing arm 42a, and the other end of the synchronous slider 43 along the Y-axis direction is aligned with the second spiral body 403b of the second swing arm 41b and the fourth spiral body 423b of the fourth swing arm 42b.

[0265] One end of the first mounting shaft 44a extending out of the first adjustment member 46a is located in the first mounting hole 231, and one end of the first mounting shaft 44a extending out of the first through hole 434a of the first connecting block 434 is fixed in the second mounting hole. One end of the second mounting shaft 44b extending out of the third adjustment member 46b is fixed in the third mounting hole 232, and one end of the second mounting shaft 44b extending out of the second through hole 435a of the second connecting block 435 is fixed in the fourth mounting hole. Specifically, when the first mounting shaft 44a and the second mounting shaft 44b are installed, the mounting block 20b and the supporting body 20a constituting the second mounting hole and the fourth mounting hole are in a disassembled state, and one end of the first mounting shaft 44a extending out of the threaded hole of the first adjustment member 46a first extends into the first mounting hole 231, and one end of the first mounting shaft 44a extending out of the first connecting block 434 is located at the portion of the supporting body 20a constituting the second mounting hole. One end of the second mounting shaft 44b extending out of the threaded hole of the third adjusting member 46b first extends into the third mounting hole 232, and one end of the second mounting shaft 44b extending out of the second connecting block 435 is located at the portion of the carrier body 20a that constitutes the fourth mounting hole. Then, the mounting block 20b constituting the second mounting hole and the fourth mounting hole is assembled to the carrier body 20a, so that one end of the first mounting shaft 44a extending out of the first connecting block 434 is located in the second mounting hole, and one end of the second mounting shaft 44b extending out of the second connecting block 435 is located in the fourth mounting hole. The side of the first adjusting member 46a facing away from the first pre-pressing member 45a faces one groove wall surface of the first mounting groove 23, and the side of the first connecting block 434 facing away from the second adjusting member 47a faces another groove wall surface of the first mounting groove 23. The side of the third adjusting member 46b facing away from the third pre-pressing member 45c faces one groove wall surface of the first mounting groove 23, and the side of the second connecting block 435 facing away from the fourth adjusting member 47b faces another groove side surface of the second mounting groove 24.

[0266] The first adjusting member 46a is threadedly connected to the first mounting shaft 44a. When the first adjusting member 46a is screwed, the force applied by the first adjusting member 46a to the first pre-pressing member 45a can be adjusted when the first adjusting member 46a moves toward or away from the first pre-pressing member 45a on the first mounting shaft 44a, and the pre-tightening force provided by the first pre-pressing member 45a to the first swing arm 41a can be adjusted. Specifically, when the first adjusting member 46a is screwed, the first adjusting member 46a pushes the first pre-pressing member 45a, and the compression of the first pre-pressing member 45a increases, and the force applied to the first spiral body 403a of the first swing arm 41a increases, so that the pre-tightening force between the first spiral body 403a and the first spiral block 432 is increased, so that the first spiral surface 411a is better in contact with the first mating surface 432e. When the first adjusting member 46a is screwed so as to move in a direction away from the first pre-pressing member 45a, the force exerted by the first adjusting member 46a on the first pre-pressing member 45a is reduced, the compression amplitude of the first pre-pressing member 45a is reduced, and the pre-tightening force between the first spiral body 403a and the first spiral block 432 is reduced.

[0267] The second adjusting member 47a is a retaining spring. Under the action of external force, the position of the second adjusting member 47a on the first mounting shaft 44a can be changed, and then the force applied by the second adjusting member 47a to the second pre-pressing member 45b can be adjusted, and finally the purpose of adjusting the pre-tightening force provided by the second pre-pressing member 45b to the second swing arm 41b is achieved. Specifically, when the second adjusting member 47a moves toward the second pre-pressing member 45b under the action of external force, the force applied by the second adjusting member 47a to the second pre-pressing member 45b increases, and the compression amplitude of the second pre-pressing member 45b increases. Then, the force applied by the second pre-pressing member 45b to the second spiral body 403b increases, and the pre-tightening force between the second spiral body 403b and the first spiral block 432 is increased, so that the second spiral surface 411b is better in contact with the second mating surface 432e. When the second adjusting member 47a moves away from the second pre-pressing member 45b under the action of external force, the force applied by the second adjusting member 47a to the second pre-pressing member 45b is reduced. Therefore, the compression amplitude of the second pre-pressing member 45b is reduced, and at this time, the force applied by the second pre-pressing member 45b to the second spiral body 403b is reduced, thereby reducing the pre-tightening force between the second spiral body 403b and the first spiral block 432.

[0268] It can be understood that the external force acting on the second adjustment member 47a can be manually or with the help of certain tools by the assembler to remove the second adjustment member 47a from the first mounting shaft 44a. Then the second adjustment member 47a is reinstalled on the first mounting shaft 44a manually or with the help of certain tools. The position of the reinstalled second adjustment member 47a along the Y-axis direction on the first mounting shaft 44a is different from that on the first mounting shaft 44a. Once the second adjustment member 47a is installed on the first mounting shaft 44a, the position of the second adjustment member 47a on the first mounting shaft 44a will not change during the normal folding and unfolding of the rotating mechanism 100. In other words, when there is no external force, the position of the second adjustment member 47a on the first mounting shaft 44a is fixed.

[0269] The third adjusting member 46b is threadedly connected to the second mounting shaft 44b. When the third adjusting member 46b is screwed, the force applied by the third adjusting member 46b to the third pre-pressing member 45c can be adjusted when the third adjusting member 46b moves toward or away from the third pre-pressing member 45c on the second mounting shaft 44b, and the pre-tightening force provided by the third pre-pressing member 45c to the third swing arm 42a can be adjusted. Specifically, when the third adjusting member 46b is screwed, the third adjusting member 46b pushes the third pre-pressing member 45c, and the compression of the third pre-pressing member 45c increases, and the force applied to the third spiral body 423a of the third swing arm 42a increases, so that the pre-tightening force between the third spiral body 423a and the second spiral block 433 is increased, so that the third spiral surface 431A is better in contact with the third mating surface 433e.

[0270] When the third adjusting member 46b is screwed to move the third adjusting member 46b in a direction away from the third pre-pressing member 45c, the force of the third adjusting member 46b on the third pre-pressing member 45c is reduced, the compression amplitude of the third pre-pressing member 45c is reduced, and the pre-tightening force between the third spiral body 423a and the second spiral block 433 is reduced. The force acting on the third swinging member 421a, the fourth swinging member 421b and the fourth spiral body 423b is also reduced synchronously, the compression amplitude of the fourth pre-pressing member 45d is reduced, and the pre-tightening force between the fourth spiral body 423b and the second spiral block 433 is reduced.

[0271] The fourth adjusting member 47b is a clamping spring. Under the action of external force, the position of the fourth adjusting member 47b on the second mounting shaft 44b can be changed, and then the force applied by the fourth adjusting member 47b to the fourth pre-pressing member 45d can be adjusted, and finally the purpose of adjusting the pre-tightening force provided by the fourth pre-pressing member 45d to the fourth swing arm 42b is achieved. Specifically, when the fourth adjusting member 47b moves toward the fourth pre-pressing member 45d under the action of external force, the force applied by the fourth adjusting member 47b to the fourth pre-pressing member 45d increases. Therefore, the compression amplitude of the fourth pre-pressing member 45d increases, and the force applied by the fourth pre-pressing member 45d to the fourth helical body 423b increases, so that the pre-tightening force between the fourth helical body 423b and the second helical block 433 is increased, so that the fourth helical surface 431B and the fourth mating surface 433f are better abutted. When the fourth adjusting member 47b moves away from the fourth pre-pressing member 45d under the action of external force, the force applied by the fourth adjusting member 47b to the fourth pre-pressing member 45d is reduced. Therefore, the compression amplitude of the fourth pre-pressing member 45d is reduced, and the force applied by the fourth pre-pressing member 45d to the fourth spiral 423b is reduced, thereby reducing the preload force between the fourth spiral 423b and the second spiral block 433.

[0272] It can be understood that the external force acting on the fourth adjustment member 47b can be manually or with the help of a certain tool by the assembler to remove the fourth adjustment member 47b from the second mounting shaft 44b. Then the fourth adjustment member 47b is reinstalled on the second mounting shaft 44b manually or with the help of a certain tool, and the position of the reinstalled fourth adjustment member 47b along the Y-axis direction is different from that on the first mounting shaft 44a. Once the fourth adjustment member 47b is installed on 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, when there is no external force, the position of the fourth adjustment member 47b on the second mounting shaft 44b is fixed.

[0273] 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, and the first swinging body 401a of the first swing arm 41a and the second swinging body 401b of the second swing arm 41b are located in the first synchronous sliding groove 112 of the first fixing plate 11. The first swinging body 401a and the second swinging body 401b can slide in the first synchronous sliding groove 112.

[0274] The third connecting body 422a of the third swing arm 42a and the fourth connecting body 422b of the fourth swing arm 42b extend out of the first mounting groove 23 from the other side of the first mounting groove 23, and 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 groove 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 groove 122.

[0275] In this embodiment, reference Figure 4 , Fig.16 and Fig.17 , a portion of the first sliding member 53 is located between the first rotating cylinder 512a and the second rotating cylinder 512b, and another portion of the first sliding member 53 is located between the third rotating cylinder 522a and the fourth rotating cylinder 522b. A portion of the second sliding member 54 is located between the first rotating cylinder 512a and the second rotating cylinder 512b, and another portion of the second sliding member 54 is located between the third rotating cylinder 522a and the fourth rotating cylinder 522b. The first concave cam 512c is engaged with the first matching wheel 532, the second concave cam 512d is engaged with the second matching wheel 542, the third concave cam 522c is engaged with the third matching wheel 533, and the fourth concave cam 522d is engaged with the fourth matching wheel 543. That is, the first protrusion is located in the first matching recess, and the first matching protrusion is located in the first recess; the second protrusion is located in the second matching recess, and the second matching protrusion is located in the second recess; the third protrusion is located in the third matching recess, and the third matching protrusion is located in the third recess; the fourth protrusion is located in the fourth matching recess, and the fourth matching protrusion is located in the fourth recess. The number, distribution, shape and size of the first to fourth protrusions and the first to fourth matching protrusions are the same. As a result, the first concave cam 512c, the second concave cam 512d, the third concave cam 522c, and the fourth concave cam 522d are respectively engaged with the first matching wheel 532, the second matching wheel 542, the third matching wheel 533 and the fourth matching wheel 543 with strong stability.

[0276] 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 have their respective ends abutted against the first sliding member 53 and the second sliding member 54.

[0277] The first rotating hole 512e, the second rotating hole 512f, the first connecting hole 534, the second connecting hole 544, the first mounting hole 231 and the second mounting hole are coaxial. The third rotating hole 522e, the fourth rotating hole 522f, the third connecting hole 535, the fourth connecting hole 545, the third mounting hole 232 and the fourth mounting hole are coaxial. The fifth connecting hole 536 and the sixth connecting hole 546 are coaxial, and the seventh connecting hole 537 and the eighth connecting hole 547 are coaxial. The first connecting rod 56a passes through the first rotating hole 512e, the first connecting hole 534, the hollow part of the first elastic member 551, the second connecting hole 544 and the second rotating hole 512f in sequence, and the two ends of the first connecting rod 56a are fixed in the first mounting hole 231 and the second mounting hole, respectively. The second connecting rod 56b passes through the third rotating hole 522e, the third connecting hole 535, the hollow part of the second elastic member 552, the fourth connecting hole 545 and the fourth rotating hole 522f in sequence, and the two ends of the second connecting rod 56b are respectively fixed in the third mounting hole 232 and the fourth mounting hole. The third connecting rod 56c passes through the hollow part of the third elastic member 553, and the two ends of the third connecting rod 56c are respectively fixed in the fifth connecting hole 536 and the sixth connecting hole 546. The fourth connecting rod 56d passes through the hollow part of the fourth elastic member 554, and the two ends of the fourth connecting rod 56d are respectively fixed in the seventh connecting hole 537 and the eighth connecting hole 547.

[0278] 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. 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 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 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 kept in the unfolded state or the folded state.

[0279] 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 in the second mounting groove 24 of the bearing base 20. The portion of the first connecting rod 56a extending out of the first rotating cylinder 512a is fixed in the first fastening hole 242, and the portion of the first connecting rod 56a extending out of the second rotating cylinder 512b is fixed in the second fastening hole.

[0280] 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 sliding member 53 and the second sliding member 54 along the Y-axis direction, thereby preventing the first sliding member 53 and the second sliding member 54 from shaking when moving along the Y-axis direction, so that the movement of the first sliding member 53 and the second sliding member 54 is more stable.

[0281] 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 in 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 in 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. The first connecting shaft passes through the first guide slide groove 116, and the two ends of the first connecting shaft are respectively fixed in the first sliding hole 516a and the second sliding hole 517a. The first connecting shaft can slide and rotate in the first guide slide groove 116, so that the first sliding cylinder 516 and the second sliding cylinder 517 slide and rotate, thereby realizing the sliding and rotation of the first damping swing arm 51 relative to the first fixed plate 11.

[0282] When installing the first connecting shaft, first make the first sliding cylinder 516 and the second sliding cylinder 517 located 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 located in the first damping groove 113 and the second damping groove 114 respectively.

[0283] 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 in the third damping slide groove 123, and at least a portion of the fourth sliding arm 525 and the fourth sliding cylinder 527 are located in the fourth damping slide groove 124. In other words, a portion of the second guide slider 125 is located between the third sliding arm 524 and the fourth sliding arm 525, and another portion of the second guide slider 125 is located between the third sliding cylinder 526 and the fourth sliding cylinder 527. The second connecting shaft passes through the second guide slide groove 126, and the two ends of the second connecting shaft are respectively fixed in the third sliding hole 526a and the fourth sliding hole 527a. The second connecting shaft can slide and rotate in the second guide slide groove 126, so that the third sliding cylinder 526 and the fourth sliding cylinder 527 slide and rotate, thereby realizing the sliding and rotation of the second damping swing arm 52 relative to the second fixed plate 12.

[0284] 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.

[0285] In this embodiment, when the rotating mechanism 100 is in the unfolded 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).

[0286] refer to Fig. 22 and Fig.23 , Fig. 22 yes Figure 4 The schematic diagram of the structure of the rotating mechanism 100 switching from the unfolded state to the folded state is shown in FIG. Fig.23 yes Fig. 22 A partial cross-sectional view of the rotating mechanism 100 is shown in FIG.

[0287] When the rotating mechanism 100 switches from the unfolded state to the folded state, the first fixed plate 11 rotates counterclockwise relative to the bearing base 20. The first main sliding body 312 of the first main swing arm 31 slides and rotates counterclockwise in the first main slide groove 21, and the first main rotating body 311 of the first main swing arm 31 rotates counterclockwise around the first fixed shaft 33. 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 counterclockwise in the first synchronous slide 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 counterclockwise around the first mounting shaft 44a. During the rotation of the first spiral body 403a, the first spiral surface 411a gradually pushes the first matching surface 432e, so that the synchronous slider 43 slides along the guide bar 233 toward 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 body 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.

[0288] When the synchronous slider 43 slides in the negative direction of the Y axis, the fourth mating surface 433f gradually pushes 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 slides into the fourth helical opening. The fourth helical body 423b of the fourth swing arm 42b rotates clockwise around the second mounting shaft 44b, and the third helical body 423a of the third swing arm 42a rotates 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 in the second synchronous slide groove 122. This drives the second fixed plate 12 to rotate clockwise, so that the second fixed plate 12 and the first fixed plate 11 are folded synchronously.

[0289] The first sliding body 511 of the first damping swing arm 51 rotates counterclockwise around the first connecting shaft, and the first connecting shaft slides in the first guide groove 116, driving the first sliding body 511 to slide in the first guide groove 116. The first rotating body 512 of the first damping swing arm 51 rotates counterclockwise around the first connecting rod 56a, so that the first protrusion gradually moves out of the first matching recess, and the first matching protrusion gradually moves out of the first recess; the second protrusion gradually moves out of the second matching recess, and the second matching protrusion gradually moves out of the second 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 matching wheel 532, and the second concave cam 512d pushes the third matching wheel 533, so that the first matching wheel 532 and the second matching wheel 542 are close to each other, the first slider 531 and the second slider 541 are close to 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 respectively compressed at both ends synchronously, thereby providing damping force for the first fixed plate 11.

[0290] When the rotating mechanism 100 switches from the unfolded state to the folded state, the second fixed plate 12 rotates clockwise relative to the bearing base 20. The second main sliding body 322 of the second main swing arm 32 slides and rotates clockwise in the second main sliding groove 22, and the second main rotating body 321 of the second main swing arm 32 rotates clockwise around the second fixed shaft 34. 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 in the second synchronous sliding groove 122. The third spiral body 423a of the third swing arm 42a and the fourth spiral body 423b of the fourth swing arm 42b rotate clockwise around the second mounting shaft 44b. During the rotation of the third spiral body 423a, the third spiral surface 431A gradually pushes the third matching surface 433e, so that the synchronous slider 43 slides along the guide bar 233 in the negative direction of the Y axis. During the rotation of the fourth spiral body 423b, the fourth matching surface 433f slides along the fourth spiral surface 431B. The second spiral block 433 gradually slides out from the third spiral opening of the third spiral body 423a, and gradually slides into the fourth spiral opening.

[0291] When the synchronous slider 43 slides along the guide strip 233 toward the negative direction of the Y axis, the second mating surface 432f gradually pushes the second helical surface 411b, and the first mating surface 432e of the first helical block 432 slides along the first helical surface 411a of the first helical body 403a, and 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 body 401a of the first swing arm 41a and the second swinging body 401b of the second swing arm 41b slide in the first synchronous slide groove 112 and rotate counterclockwise. The first helical body 403a of the first swing arm 41a and the second helical body 403b of the second swing arm 41b rotate counterclockwise around the first mounting shaft 44a. This in turn drives the first fixed plate 11 to rotate counterclockwise, so that the first fixed plate 11 and the second fixed plate 12 are folded synchronously.

[0292] The first swing body 401a is connected to the second swing body 401b, so that the first swing arm 41a and the second swing arm 41b move synchronously. The third swing body 421a is connected to the fourth swing body 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 body 403a and the second spiral body 403b respectively, and the second spiral block 433 of the synchronous slider 43 cooperates with the third spiral body 423a and the fourth spiral body 423b respectively, so that the first synchronous swing arm 41 and the second synchronous swing arm 42 can rotate simultaneously, thereby realizing the synchronization of the movement of the first fixed plate 11 and the second fixed plate 12, and ensuring the synchronization of the movement of the first shell and the second shell.

[0293] The second sliding body 521 of the second damping swing arm 52 rotates counterclockwise around the second connecting shaft, and the second connecting shaft slides in the second guide groove 126, driving the second sliding body 521 to slide in the second guide groove 126. The second rotating body 522 of the second damping swing arm 52 rotates clockwise around the second connecting rod 56b, so that the third protrusion gradually moves out of the third matching recess, the third matching protrusion gradually moves out of the third recess; the fourth protrusion gradually moves out of the fourth matching recess, and the fourth matching protrusion gradually moves out of the fourth 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 matching wheel 533, and the fourth concave cam 522d pushes the fourth matching wheel 543, so that the third matching wheel 533 and the fourth matching wheel 543 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 respectively compressed at both ends synchronously, thereby providing damping force for the second fixed plate 12.

[0294] That is, when the rotating mechanism 100 switches from the unfolded state to the folded state, the first sliding member 53 and the second sliding member 54 slide towards each other under the drive of the first damping swing arm 51 and the second damping swing arm 52, and at this time, both ends of the first elastic member 551, the second elastic member 552, the third elastic member 553 and the fourth elastic member 554 are gradually compressed synchronously, and the first elastic member 551, the second elastic member 552, the third elastic member 553 and the fourth elastic member 554 are gradually compressed, which can provide damping force for the first fixed plate 11 and the second fixed plate 12, so that the user can get a damping feel. The damping force is double that of the elastic member compressed at one end, and the damping feel is better.

[0295] refer to Fig.24 and Fig.25 , Fig.24 yes Figure 4 The structure diagram of the rotating mechanism 100 shown in FIG. 1 is in a folded state. Fig.25 yes Fig.23 FIG. 1 is a partial cross-sectional view of the rotating mechanism 100 shown in FIG.

[0296] 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 against the end of the first mating protrusion of the first mating wheel 532. The second protrusion of the second concave cam 512d abuts against the end of the second mating protrusion of the second mating wheel 542. The third protrusion of the third concave cam 522c abuts against the end of the third mating protrusion of the third mating wheel 533. The fourth protrusion of the fourth concave cam 522d abuts against the end of the fourth mating protrusion of the fourth mating wheel 543. One end of the synchronous slider 43 along the Y-axis direction is misaligned with the first spiral body 403a of the first swing arm 41a and the third spiral body 423a of the third swing arm 42a, and one end of the synchronous slider 43 is aligned with the middle area of ​​the first spiral body 403a of the first swing arm 41a and the third spiral body 423a of the third swing arm 42a. The other end of the synchronous slider 43 along the Y-axis direction is misaligned with the second spiral body 403b of the second swing arm 41b and the fourth spiral body 423b of the fourth swing arm 42b, and the other end of the synchronous slider 43 is aligned with the first connecting block 434 and the second connecting block 435.

[0297] When the rotating mechanism 100 switches from the folded state to the unfolded state, the first fixed plate 11 rotates clockwise relative to the bearing base 20. The first main sliding body 312 of the first main swing arm 31 slides and rotates clockwise in the first main sliding groove 21, and the first main rotating body 311 of the first main swing arm 31 rotates clockwise around the first fixed shaft 33. 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. During the rotation of the second spiral body 403b, the second spiral surface 411b gradually pushes the second matching surface 432f, so that the synchronous slider 43 slides along the guide bar 233 toward the positive direction of the Y axis. During the rotation of the first spiral body 403a, the first spiral surface 411a slides along the first matching 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.

[0298] When the synchronous slider 43 slides along the guide strip 233 toward the positive direction of the Y axis, the third mating surface 433e gradually pushes 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 into the third helical opening. The third helical body 423a of the third swing arm 42a rotates counterclockwise around the second mounting shaft 44b, so that the fourth helical body 423b of the fourth swing arm 42b rotates 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 in the second synchronous slide groove 122. This in turn drives the second fixed plate 12 to rotate counterclockwise, so that the second fixed plate 12 and the first fixed plate 11 are folded synchronously.

[0299] The first sliding body 511 of the first damping swing arm 51 rotates clockwise around the first connecting shaft, and the first connecting shaft slides in the first guide groove 116, driving the first sliding body 511 to slide in the first guide groove 116. The first rotating body 512 of the first damping swing arm 51 rotates clockwise around the first connecting rod 56a, so that the first protrusion gradually moves into the first matching recess, the first matching protrusion gradually moves into the first recess; the second protrusion gradually moves into the second matching recess, and the second matching protrusion gradually moves into the second recess. At this time, the positions of the first rotating cylinder 512a and the second rotating cylinder 512b along the Y-axis direction remain unchanged, the first matching wheel 532 and the second matching wheel 542 move away from each other, the first slider 531 and the second slider 541 move away from 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 released at both ends synchronously, thereby providing damping force for the first fixed plate 11.

[0300] When the rotating mechanism 100 switches from the folded state to the unfolded state, the second fixed plate 12 rotates counterclockwise relative to the bearing base 20. The second main sliding body 322 of the second main swing arm 32 slides and rotates counterclockwise in the second main slide groove 22, and the second main rotating body 321 of the second main swing arm 32 rotates counterclockwise around the second fixed shaft 34. 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 in the second synchronous slide groove 122. The third spiral body 423a of the third swing arm 42a and the fourth spiral body 423b of the fourth swing arm 42b rotate counterclockwise around the second mounting shaft 44b. During the rotation of the third spiral body 423a, the fourth spiral surface 431B gradually pushes the fourth matching surface 433f, so that the synchronous slider 43 slides along the guide bar 233 toward the positive direction of the Y axis. At this time, during the rotation of the fourth spiral body 423b, the third spiral surface 431A slides along the third matching 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.

[0301] When the synchronous slider 43 slides along the guide strip 233 toward the positive direction of the Y axis, the first mating surface 432e gradually pushes the first spiral surface 411, and the second mating surface 432f slides along the second spiral 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 slide 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 drives the first fixed plate 11 to rotate clockwise, so that the first fixed plate 11 and the second fixed plate 12 are folded synchronously.

[0302] The first swing body 401a is connected to the second swing body 401b, so that the first swing arm 41a and the second swing arm 41b move synchronously. The third swing body 421a is connected to the fourth swing body 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 body 403a and the second spiral body 403b respectively, and the second spiral block 433 of the synchronous slider 43 cooperates with the third spiral body 423a and the fourth spiral body 423b respectively, so that the first synchronous swing arm 41 and the second synchronous swing arm 42 can rotate simultaneously, thereby realizing the synchronization of the movement of the first fixed plate 11 and the second fixed plate 12, and ensuring the synchronization of the movement of the first shell and the second shell.

[0303] The second sliding body 521 of the second damping swing arm 52 rotates counterclockwise around the second connecting shaft, and the second connecting shaft slides in the second guide groove 126, driving the second sliding body 521 to slide in 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, so that the third protrusion gradually moves into the third matching recess, and the third matching protrusion gradually moves into the third recess; the fourth protrusion gradually moves into the fourth matching recess, and the fourth matching protrusion gradually moves into the fourth recess. At this time, the positions of the third rotating cylinder 522a and the fourth rotating cylinder 522b along the Y-axis direction remain unchanged, the third matching wheel 533 and the fourth matching wheel 543 move away from each other, the first slider 531 and the second slider 541 move away from 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 released at both ends synchronously, thereby providing damping force for the second fixed plate 12.

[0304] 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, and 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 released synchronously, and the first elastic member 551, the second elastic member 552, the third elastic member 553 and the fourth elastic member 554 are gradually released. The damping force can be provided to the first fixed plate 11 and the second fixed plate 12, so that the user can get a damping feel. The damping force is double that of the elastic member whose single end is released, and the damping feel is better.

[0305] In this embodiment, in the synchronization component 40, the first synchronization swing arm 41 is divided into a first swing arm 41a and a second swing arm 41b. The first swing arm 41a and the second swing arm 41b are connected by a trapezoidal structure, so that the first swing arm 41a and the second swing arm 41b are reliably connected. In other words, when in the assembled state, the first swing arm 41a and the second swing arm 41b are detachably connected, and when the first swing arm 41a and the second swing arm 41b are not assembled, the two are in a separated state. Therefore, the first swing arm 41a and the second swing arm 41b are processed independently. The dimensions of the first swing arm 41a and the second swing arm 41b along the length direction of the rotating mechanism are reduced compared to the integrated swing arm. Therefore, the processing difficulty of the first swing arm 41a and the second swing arm 41b is reduced, the processing efficiency is improved, and the cost is reduced. In particular, after the first swing arm 41a and the second swing arm 41b are separated, they can be processed using a mold, and compared with the traditional CNC processing method, the processing efficiency and processing accuracy are significantly increased.

[0306] Specifically, in the first swing arm 41a, the first through hole 406a of the first spiral body 403a penetrates the first spiral body 403a along the Y-axis direction, and the first through hole 406a is a circular hole. In the Y-axis direction, the aperture of the first through hole 406a is always consistent; that is, in the Y-axis direction, the curvature of the first inner peripheral surface 407a is always consistent, and there is no local protrusion or local concave. Therefore, the first through hole 406a can be processed by a mold, and the solution of processing the first spiral body 403a by a mold is realized. When processing by a mold, the mold can be removed along the Y-axis direction.

[0307] In the second swing arm 41b, the second through hole 406b of the second spiral body 403b penetrates the first spiral body 403a along the Y-axis direction. The second through hole 406b is a circular hole. In the Y-axis direction, the aperture of the second through hole 406b is always consistent; that is, in the Y-axis direction, the curvature of the second inner peripheral surface 407b is always consistent, and there is no local protrusion or local concave. Therefore, the second through hole 406b can be processed by a mold, and the second spiral body 403b can be processed by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0308] In the synchronous assembly 40, the second synchronous swing arm 42 is divided into two parts, the third swing arm 42a and the fourth swing arm 42b. The third swing arm 42a and the fourth swing arm 42b are connected by a trapezoidal structure, so that the third swing arm 42a and the fourth swing arm 42b are reliably connected. In other words, when in the assembled state, the third swing arm 42a and the fourth swing arm 42b are detachably connected, and when the third swing arm 42a and the fourth swing arm 42b are not assembled, the two are in a split state. Therefore, the third swing arm 42a and the fourth swing arm 42b are processed independently. The dimensions of the third swing arm 42a and the fourth swing arm 42b along the length direction of the rotating mechanism are reduced compared to the integrated swing arm. Therefore, the processing difficulty of the third swing arm 42a and the fourth swing arm 42b is reduced, the processing efficiency is improved, and the cost is reduced. In particular, after the third swing arm 42a and the fourth swing arm 42b are separated, they can be processed by a mold, and the processing efficiency and processing accuracy are significantly increased compared to the traditional CNC processing method.

[0309] Specifically, in the third swing arm 42a, the third through hole 426a of the third spiral body 423a penetrates the first spiral body 403a along the Y-axis direction, and the third through hole 426a is a circular hole. In the Y-axis direction, the aperture of the third through hole 426a is always consistent; that is, in the Y-axis direction, the curvature of the third inner peripheral surface 427a is always consistent, and there is no local protrusion or local concave. Therefore, the third through hole 426a can be processed by a mold, and the solution of processing the third spiral body 423a by a mold is realized. When processing by a mold, the mold can be removed along the Y-axis direction.

[0310] In the fourth swing arm 42b, the fourth through hole 426b of the fourth spiral body 423b penetrates the first spiral body 403a along the Y-axis direction. The fourth through hole 426b is a circular hole. In the Y-axis direction, the aperture of the fourth through hole 426b is always consistent; that is, in the Y-axis direction, the curvature of the fourth inner peripheral surface 427b is always consistent, and there is no local protrusion or local concave. Therefore, the fourth through hole 426b can be processed by a mold, and the fourth spiral body 423b can be processed by a mold. When processing by a mold, the mold can be removed along the Y-axis direction.

[0311] That is, the first synchronous swing arm 41 and the second synchronous swing arm 42 can be processed by a mold. However, the traditional one-piece swing arm solution cannot be demolded in the Y-axis direction due to the existence of the spiral structure, and can only be processed by CNC, which is costly, inefficient, and has poor precision. The structure of the present application can be processed by a mold, which reduces costs, improves processing efficiency, and has high precision.

[0312] In this embodiment, the first spiral block 432 and the second spiral block 433 of the synchronous slider 43 can also be processed using a mold. Specifically, the portion of the first inner wall surface 432c of the hole wall surface of the first through hole 432a and the rest of the first inner wall surface 432c are connected in the Y-axis direction, and the portion of the first inner wall surface 432c of the hole wall surface of the first through hole 432a and the rest of the first inner wall surface 432c are bent in the same arc along the X-axis direction. That is, the first through hole 432a is a circular hole, and the aperture remains unchanged. Therefore, when the first through hole 432a is processed by the mold, the mold can be removed along the Y-axis direction, and the first through hole 432a is processed by the mold, and the first mating surface 432e and the first through hole 432a can be processed synchronously. The second mating surface 432f is flush with the groove wall surface of the first demolding groove in the Z-axis direction. When the second mating surface 432f is processed by the mold, the mold can be removed along the Z-axis direction, and the second mating surface 432f is processed by the mold. Thus, the first spiral block 432 can be manufactured using a mold.

[0313] The portion of the second inner wall surface 433c of the hole wall surface of the second through hole 433a and the rest of the second inner wall surface 433c are connected in the Y-axis direction, and the portion of the second inner wall surface 433c of the hole wall surface of the second through hole 433a and the rest of the second inner wall surface 433c are bent in the same arc along the X-axis direction. That is, the second through hole 433a is a circular hole, and the aperture remains unchanged. Thus, when the second through hole 433a is processed by the mold, it can be demolded along the Y-axis direction, and the second through hole 433a is processed by the mold, and the third mating surface 433e can be processed synchronously with the second through hole 433a. The fourth mating surface 433f is flush with the groove wall surface of the second demolding groove 431d in the Z-axis direction. When the fourth mating surface 433f is processed by the mold, it can be demolded along the Z-axis direction, and the fourth mating surface 433f is processed by the mold. Thus, the second spiral block 433 can be made using a mold.

[0314] From the above, it can be seen that in the present embodiment, the first synchronous swing arm 41, the second synchronous swing arm 42 and the synchronous slider 43 of the synchronous assembly 40 can all be processed by molds. Compared with the traditional structure that can only be processed by CNC, the structure of the synchronous slider 43 of the present application can be processed by molds, which reduces costs, improves processing efficiency, and has higher precision.

[0315] In this embodiment, the stroke of the first sliding member 53 and the second sliding member 54 squeezing the first elastic member 551, the second elastic member 552, the third elastic member 553 and the fourth elastic member 554 is specifically as follows: Assuming that the heights from the first protrusion to the fourth protrusion and from the first matching protrusion to the fourth matching 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 matching recess of the first matching wheel 532, the second matching recess of the second matching wheel 542, the third matching recess of the third matching wheel 533 and the fourth matching recess of the fourth matching wheel 543, the distance between the surface of the first sliding block 531 away from the first concave cam 512c and the surface of the second sliding block 541 away from the third concave cam 522c is V.

[0316] When the first protrusion of the first concave cam 512c, the second protrusion of the second concave cam 512d, the third protrusion of the third concave cam 522c, and the fourth protrusion of the fourth concave cam 522d respectively abut against the first mating protrusion of the first mating wheel 532, the second mating protrusion of the second mating wheel 542, the third mating protrusion of the third mating wheel 533, and the fourth mating protrusion of the fourth mating wheel 543, the distance between the surface of the first slider 531 away from the first concave cam 512c and the surface of the second slider 541 away from the third concave cam 522c is W, and W = VU. In other words, the distance that the first slider 53 moves in the negative direction of the Y axis is U, and the distance that the second slider 54 moves in the positive direction of the Y axis is U.

[0317] The lengths of the first elastic member 551 and the second elastic member 552 before being compressed are both equal to the distance V between the surface of the first slider 531 away from the first concave cam 512c and the surface of the second slider 541 away from the third concave cam 522c. The lengths of the first elastic member 551 and the second elastic member 552 after being compressed are both equal to the distance W between the surface of the first slider 531 away from the first concave cam 512c and the surface of the second slider 541 away from the third concave cam 522c. Since W=VU, the strokes of compression of both ends of the first elastic member 551 and the strokes of compression of both ends of the second elastic member 552 are both U.

[0318] 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.

[0319] 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.

[0320] In addition, the first elastic member 551, the second elastic member 552, the third elastic member 553 and the fourth elastic member 554 are compressed synchronously. Compared with the scheme in which only one end of the elastic member is compressed, the height U of the first protrusion to the fourth protrusion and the first matching protrusion to the fourth matching protrusion along the Y-axis direction can be set smaller, specifically half of the scheme in which only one end is compressed. In the case of a smaller height, the wear of the first protrusion to the fourth protrusion and the first matching protrusion to the fourth matching protrusion can be reduced, thereby extending the life of the first protrusion to the fourth protrusion and the first matching protrusion to the fourth matching protrusion, and further extending the life of the first concave cam 512c to the fourth concave cam 522d and the first matching wheel 532 to the fourth matching wheel 543.

[0321] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A rotating mechanism, characterized in that: include: A first fixed plate, a second fixed plate, a bearing base, a synchronous slider, a first synchronous swing arm and a second synchronous swing arm; The first fixing plate and the second fixing plate are located at opposite sides of the bearing base; the first synchronous swing arm and the second synchronous swing arm are respectively installed at 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 synchronous slider is installed on the bearing base, and the synchronous slider comprises a synchronous body, a first spiral block and a second spiral block, and the first spiral block and the second spiral block are symmetrical relative to the synchronous body; The first synchronous swing arm comprises a first swing arm and a second swing arm, the first swing arm is detachably connected to the second swing arm, the first swing arm comprises a first spiral body, and the second swing arm comprises a second spiral body; The second synchronous swing arm comprises a third swing arm and a fourth swing arm, the third swing arm is detachably connected to the fourth swing arm, the third swing arm comprises a third spiral body, and the fourth swing arm comprises a fourth spiral body; The first helix and the second helix cooperate with the first helical block, and the third helix and the fourth helix cooperate with the second helical block. When the first synchronous swing arm or the second synchronous swing arm rotates relative to the bearing base, the first synchronous swing arm and the second synchronous swing arm rotate simultaneously.

2. The rotating mechanism according to claim 1, characterized in that: The first swing arm further comprises a first swing body and a first connecting body. Along the width direction of the rotating mechanism, the first swing body, the first connecting body and the first spiral body are connected in sequence; the first swing body is slidably and rotationally connected to the first fixing plate; the first spiral body is rotationally connected to the bearing base; The second swing arm also includes a second swinging body and a second connecting body. Along the width direction of the rotating mechanism, the second swinging body, the second connecting body and the second spiral body are connected with the first fixed plate in a sliding and rotational manner, and the second spiral body is connected with the supporting base in a rotational manner.

3. The rotating mechanism according to claim 1, characterized in that: The first helical body cooperates with the first helical block and the synchronous body respectively, and the second helical body cooperates with the first helical block and the synchronous body respectively; The third helical body cooperates with the second helical block and the synchronous body respectively, and the fourth helical body cooperates with the second helical block and the synchronous body respectively.

4. The rotating mechanism according to claim 2, characterized in that: The rotating mechanism further comprises 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 installation axis passes through the first through hole; and the first spiral body can rotate around the first installation axis.

5. The rotating mechanism according to claim 4, characterized in that: The first through hole is a circular hole, and the sizes of the first through hole along the length direction of the rotating mechanism are all equal.

6. The rotating mechanism according to claim 4, 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.

7. The rotating mechanism according to claim 4, characterized in that: The synchronous slider is provided with a first matching surface, and the first matching surface is a helical surface; the first helical surface abuts against the first matching surface.

8. The rotating mechanism according to claim 1, characterized in that: The first spiral block comprises a first mating surface and a second mating surface, the first mating surface and the second mating surface are located on both sides of the first spiral block along the length direction of the rotating mechanism, and the first mating surface and the second mating surface are spiral surfaces; The first helical body is provided with a first helical surface, the second helical body is provided with a second helical surface, the first helical surface abuts against the first matching surface, and the second helical surface abuts against the second matching surface; The second helical block comprises a third mating surface and a fourth mating surface, the third mating surface and the fourth mating surface are located on both sides of the second helical block along the length direction of the rotating mechanism, and the third mating surface and the fourth mating surface are helical surfaces; The third helical body is provided with a third helical surface, and the fourth helical body is provided with a fourth helical surface. The third helical surface abuts against and matches the third matching surface, and the fourth helical surface abuts against and matches the fourth matching surface.

9. The rotating mechanism according to claim 7, characterized in that: The synchronous slider comprises a fixedly connected synchronous body, and the synchronous body is slidably mounted on the bearing base; the first spiral block is provided with a first through hole and the first matching 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.

10. The rotating mechanism according to claim 9, 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 in an axial spiral around 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 axis also passes through the second through hole. The second spiral body can rotate around the first mounting axis. The second spiral surface extends in an axial spiral around the second through hole. The second spiral surface abuts the second mating surface.

11. The rotating mechanism according to claim 10, characterized in that: The first spiral block is further provided with a first connecting surface, a second connecting surface, a first inner wall surface and a first outer wall surface; the first inner wall surface and the first outer wall surface are opposite to each other along the length direction of the rotating mechanism, and the first through hole penetrates the first connecting surface and the second connecting surface; a part of the first inner wall surface is the hole wall surface of the first through hole, and the first outer wall surface is 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.

12. The rotating mechanism according to claim 11, characterized in that: The first inner wall surface has the same arc angle in the length direction of the rotating mechanism.

13. The rotating mechanism according to claim 10, characterized in that: The synchronous body is provided with a first ejection groove, and the first ejection groove penetrates the synchronous body along the thickness direction of the rotating mechanism; in the thickness direction of the rotating mechanism, a part of the second matching surface is flush with the groove wall surface of the first ejection groove.

14. The rotating mechanism according to claim 10, characterized in that: The bearing base is provided with a first mounting groove, a part of the first swing arm, a part of the second swing arm, the synchronous slider, and the first mounting shaft are all located in the first mounting groove, and two ends of the first mounting shaft are respectively fixedly connected to two opposite groove walls of the first mounting groove.

15. The rotating mechanism according to claim 14, characterized in that: 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 surface 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.

16. The rotating mechanism according to claim 8, characterized in that: The rotating mechanism also includes a first pre-pressed part and a second pre-pressed part; the first pre-pressed part is arranged on the side of the first spiral body away from the first spiral block along the length direction of the rotating mechanism to provide a pre-tightening force for the cooperation between the first spiral surface and the first mating surface; the second pre-pressed part is arranged on the side of the second spiral body away from the first spiral block along the length direction of the rotating mechanism to provide a pre-tightening force for the cooperation between the second spiral surface and the second mating surface.

17. The rotating mechanism according to claim 15, 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 axial position of the first adjusting member in 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.

18. The rotating mechanism according to claim 15, 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 axial position of the second adjusting member in the first mounting shaft can be adjusted so that the second adjusting member moves toward or away from the second pre-pressing member; when the second adjusting member moves toward the second pre-pressing member, the force applied by the second adjusting member to the second pre-pressing member increases, and the pre-tightening force provided by the second pre-pressing member increases; when the second adjusting member moves away from the second pre-pressing member, the force applied by the second adjusting member to the second pre-pressing member decreases, and the pre-tightening force provided by the second pre-pressing member decreases.

19. The rotating mechanism according to claim 10, 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.

20. The rotating mechanism according to claim 10, 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 helical surface are respectively connected to the second inner circumferential surface and the second outer circumferential surface, and one end of the second helical surface is connected to the second end wall surface.

21. The rotating mechanism according to claim 1, characterized in that: A guide bar is arranged on a side of the bearing base opposite to the synchronous slider; a guide groove is arranged on a side of the synchronous slider opposite to the bearing base, and the guide bar is slidably matched with the guide groove.

22. The rotating mechanism according to any one of claims 2 to 21, 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.

23. The rotating mechanism according to claim 22, 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.

24. The rotating mechanism according to claim 23, characterized in that: The first clamping block and the first clamping slot are both in a trapezoidal 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.

25. The rotating mechanism according to any one of claims 1 to 21, characterized in that: The second synchronous swing arm comprises 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 which are 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 which are 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.

26. The rotating mechanism according to claim 25, characterized in that: The rotating mechanism further comprises a second mounting shaft, and the second mounting shaft is fixedly connected to the bearing base; The third spiral body is provided with a third through hole and a third spiral surface, 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 axis passes through the third through hole, and the third spiral body can rotate around the second mounting axis.

27. The rotating mechanism according to claim 26, 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.

28. The rotating mechanism according to claim 26, characterized in that: The third spiral body comprises 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 helical surface are respectively connected to the third inner circumferential surface and the third outer circumferential surface, and one end of the third helical surface is connected to the third end wall surface.

29. The rotating mechanism according to claim 26, characterized in that: The rotating mechanism further comprises a synchronous slider; the synchronous slider is slidably mounted on the bearing base; the synchronous slider is provided with a third matching surface, the third matching surface is a helical surface, and the third helical surface abuts against the third matching surface.

30. The rotating mechanism according to claim 29, characterized in that: The synchronous slider comprises a synchronous body and a second spiral block which are fixedly connected, and the synchronous body is slidably mounted on the bearing base; the second spiral block is provided with a second through hole and the third matching 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 third through hole, and the second mounting shaft 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 mounting shaft.

31. The rotating mechanism according to claim 30, 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 two opposite sides of the second through hole, and the fourth mating surface extends in an axial spiral around 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 axis also passes through the fourth through hole. The fourth helical body can rotate around the second mounting axis. The fourth helical surface extends in an axial spiral around the fourth through hole. The third helical surface abuts the third mating surface.

32. The rotating mechanism according to claim 31, characterized in that: The second spiral block is further 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 penetrates 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 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.

33. The rotating mechanism according to claim 32, characterized in that: The arcs of the second inner wall surfaces in the length direction of the rotating mechanism are equal.

34. The rotating mechanism according to claim 31, characterized in that: The synchronous body is provided with a second ejection groove, and the second ejection groove penetrates the synchronous body along the thickness direction of the rotating mechanism; in the thickness direction of the rotating mechanism, a part of the fourth matching surface is flush with the groove wall surface of the second ejection groove.

35. The rotating mechanism according to claim 31, 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 31, characterized in that: The bearing base is provided with a first mounting groove, and a part of the third swing arm, a part 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.

37. The rotating mechanism according to claim 36, characterized in that: The synchronous slider further includes a second connecting block, the second connecting block and the second spiral block are located on the same side of the synchronous slider; 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 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.

38. The rotating mechanism according to claim 37, 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 member in the second mounting shaft can be adjusted so that the third adjusting member moves toward or away from the third preload member; when the third adjusting member moves toward the third preload member, the force applied to the third preload member by the third adjusting member increases, and the preload force provided by the third preload member increases; when the third adjusting member moves away from the third preload member, the force applied to the third preload member by the third adjusting member decreases, and the preload force provided by the third preload member decreases.

39. The rotating mechanism according to claim 37, characterized in that: 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 member in the second mounting shaft can be adjusted so that the fourth adjusting member moves toward or away from the fourth preload member; when the fourth adjusting member moves toward the fourth preload member, the force applied to the fourth preload member by the fourth adjusting member increases, and the preload force provided by the fourth preload member increases; when the fourth adjusting member moves away from the fourth preload member, the force applied to the fourth preload member by the fourth adjusting member decreases, and the preload force provided by the fourth preload member decreases.

40. The rotating mechanism according to claim 31, 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.

41. The rotating mechanism according to claim 31, characterized in that: The fourth spiral body comprises 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.

42. The rotating mechanism according to claim 25, characterized in that: One of the third spiral body and the fourth spiral body is provided with a clamping groove, and the other of the third spiral body and the fourth spiral body is provided with a clamping block; the clamping block is clamped in the clamping groove.

43. The rotating mechanism according to claim 42, characterized in that: One side of the third swing arm is provided with a third clamping groove and a third clamping block arranged alternately, and one side of the fourth swing arm is provided with a fourth clamping groove and a fourth clamping block arranged alternately; the third clamping block is clamped in the fourth clamping groove, and the fourth clamping block is clamped in the third clamping groove.

44. The rotating mechanism according to claim 43, 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.

45. The rotating mechanism according to any one of claims 1 to 20, 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 fixing 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.

46. ​​The rotating mechanism according to claim 45, characterized in that: The first damping swing arm comprises 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 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 with the first mating wheel, and the second concave cam engages with the second mating wheel; the first elastic member abuts between the first slider and the second slider.

47. The rotating mechanism according to claim 45, 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, and the first sliding cylinder and the second sliding cylinder are arranged at intervals along the length direction of the rotating mechanism; The first fixing 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 slide block is provided between the first damping slide groove and the second damping slide groove, the first guide slide block is provided with a first guide slide groove, and the first guide slide 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 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.

48. The rotating mechanism according to claim 46, 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.

49. The rotating mechanism according to claim 48, characterized in that: The second damping swing arm comprises 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 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 sliding block; the second sliding member also includes a fourth mating wheel, which is fixedly connected to the second sliding block; the first sliding block and the second sliding block are both slidably connected to the second connecting rod; the third concave cam engages with the third mating wheel, and the fourth concave cam engages with the fourth mating wheel; the second elastic member abuts between the first sliding block and the second sliding block.

50. The rotating mechanism according to claim 48, 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 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 slide block is provided between the third damping slide groove and the fourth damping slide groove, and the second guide slide groove is respectively connected with the third damping slide groove and the fourth damping slide groove; 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 sliding groove, and the fourth sliding cylinder is located in the damping sliding 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.

51. The rotating mechanism according to claim 48, 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 abut against the first sliding member and the second sliding member respectively; When the first sliding member and the second sliding member move closer to or farther away from each other, the two ends of the third elastic member are also compressed or released synchronously.

52. The rotating mechanism according to any one of claims 1 to 21, characterized in that: The rotating mechanism also 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.

53. The rotating mechanism according to claim 52, characterized in that: The first main swing arm and the second main swing arm are staggered along the length direction of the rotating mechanism.

54. 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 53, 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, and 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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