A damping rotating part and seat armrest

Abstract

The present application relates to a damping rotating member and a seat armrest. The damping rotating member includes: a stator, a rotor and a one-way damping member. The stator includes a stator body and a plurality of first annular walls, and the plurality of first annular walls are fixed to the stator body; the rotor includes a rotor body and a plurality of second annular walls, and the plurality of second annular walls are fixed to the rotor body; the rotor is connected to the stator, and three second annular walls are adjacent to two first annular walls, and there is a gap between the first annular walls and the adjacent second annular walls, and the gap is used to accommodate a liquid medium to provide a damping force when the rotor rotates. When the damping rotating member is applied to the seat armrest, the damping force can be used to reduce the falling speed of the seat armrest when it is flipped down, and the problem of abnormal noise when the seat armrest falls can be improved. Under the action of the one-way damping member, there is no damping feeling when the armrest is lifted up, which improves the smoothness and operation texture of the user's operation.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of hardware tools, and in particular to a damping rotating part and a seat armrest. Background Art

[0002] In order to increase the riding comfort of car drivers and passengers, existing cars will be equipped with armrests on both sides of the front or middle and rear independent seats. When in use, the armrests are flipped down from the storage position parallel to the backrest to the use position to provide support for the passengers' arms; when not in use, the armrests are flipped up to the storage position. In actual working conditions, the armrests are frequently opened and folded.

[0003] The armrest is usually opened, folded, and adjusted in gear position through the armrest hinge mechanism. When the armrest hinge mechanism is a ratchet structure, the ratchet structure only provides gear adjustment and the function of locking into the storage position. Since the armrest hinge mechanism with a ratchet structure does not have a damping function, when the armrest is opened from the storage position, it falls down quickly due to its own gravity, lacking smoothness and operating texture, and will produce abnormal noise at the moment of falling, affecting the passenger's operating comfort. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a damping rotating member and a seat armrest to solve at least one problem existing in the background technology.

[0005] In a first aspect, an embodiment of the present application provides a damping rotating member, comprising:

[0006] A stator, the stator comprising a stator body and a plurality of first annular walls, wherein the plurality of first annular walls are fixed to the stator body;

[0007] A rotor, comprising a rotor body and a plurality of second annular walls, wherein the plurality of second annular walls are fixed to the rotor body; the rotor is connected to the stator, at least a portion of the second annular walls are adjacent to the first annular wall, and a gap exists between the first annular wall and the adjacent second annular wall, wherein the gap is used to accommodate a liquid medium;

[0008] A one-way damping member connected to the rotor, wherein when the one-way damping member is rotated in a first direction, the one-way damping member rotates relative to the rotor;

[0009] When the one-way damping member is rotated in a second direction, the one-way damping member drives the rotor to rotate synchronously, and the liquid medium provides a damping force for the rotation of the rotor, wherein the second direction is the opposite direction of the first direction.

[0010] In combination with the first aspect of the present application, in an optional implementation manner, the one-way damping member includes a one-way bearing, the one-way bearing includes an outer ring and an inner ring; the outer ring is connected to the rotor;

[0011] When the one-way bearing is rotated along the first direction, the inner ring rotates relative to the outer ring;

[0012] When the one-way bearing is rotated along the second direction, the inner ring drives the outer ring and the rotor to rotate synchronously.

[0013] In combination with the first aspect of the present application, in an optional implementation manner, the center of the rotor has a slot for the one-way bearing to be inserted into.

[0014] In combination with the first aspect of the present application, in an optional implementation, the first annular wall and the second annular wall are arranged alternately.

[0015] In combination with the first aspect of the present application, in an optional embodiment, the damping rotating member also includes a base plate and a cover plate, the cover plate is fixed to one side of the base plate, a chamber is formed between the cover plate and the base plate, and the stator and the rotor are located in the chamber.

[0016] In combination with the first aspect of the present application, in an optional embodiment, the damping rotating member also includes a plurality of sealing rings, which are located between at least two of the base plate, the cover plate, the rotor body, and the stator body, and are used to seal the liquid medium in the chamber; a channel is formed between the base plate and the rotor body, and one side of the rotor body has a plurality of through holes, one end of the through hole is connected to the gap, and the other end of the through hole is connected to the channel.

[0017] In combination with the first aspect of the present application, in an optional implementation manner, the stator and the cover plate are connected via a limiting structure.

[0018] In combination with the first aspect of the present application, in an optional implementation, the limiting structure includes a clamping block fixed to one side of the stator body and a clamping slot on the cover plate, and the clamping block is clamped into the clamping slot.

[0019] In combination with the first aspect of the present application, in an optional embodiment, at least a portion of the first annular wall or the second annular wall has a through hole for the liquid medium to flow through.

[0020] In a second aspect, an embodiment of the present application provides a chair armrest, comprising the damping rotating member and an armrest body as described in the first aspect, wherein the rotating shaft of the armrest body is connected to the one-way damping member.

[0021] The damping rotating part provided in the embodiment of the present application has a stator with a plurality of first annular walls and a rotor with a plurality of second annular walls. After grease is injected between the second annular walls and the first annular walls, an oil film is formed between the grease and the wall surface, and the grease produces adhesion to the wall surface. When the rotor rotates relative to the stator, it is necessary to get rid of the adhesion force, and then a damping force is generated when the rotor rotates. The setting of the one-way damping part can avoid the damping force when rotating in the first direction, and utilize the damping force when rotating in the second direction. When the damping rotating part is applied to the seat armrest, the damping force can be used to reduce the falling speed of the seat armrest when it is flipped down, and improve the problem of abnormal noise when the seat armrest falls, and there is no damping feeling when the armrest is lifted, which improves the smoothness and operation texture of the user's operation.

[0022] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 An exploded view of a damping rotating part from a top view provided in an embodiment of the present application;

[0025] Figure 2 An exploded view of a damping rotating part from a bottom perspective provided in an embodiment of the present application;

[0026] Figure 3 An assembly diagram of a damping rotating member provided in an embodiment of the present application;

[0027] Figure 4 A cross-sectional view of a damping rotating member provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the matching relationship between the first annular wall and the second annular wall in the cross-sectional view of the damping rotating member provided in an embodiment of the present application.

[0029] The reference numerals in the figure are:

[0030] 1. stator; 11. stator body; 12. first annular wall; 13. through opening; 14. block;

[0031] 2. rotor; 21. rotor body; 22. second annular wall; 23. through hole; 24. slot;

[0032] 3. One-way bearing; 31. Outer ring; 32. Inner ring;

[0033] 4. Bottom plate; 41. Bottom plate body; 42. Buckle; 43. Connection hole;

[0034] 5. Cover plate; 51. Card slot;

[0035] 6. Sealing ring. DETAILED DESCRIPTION

[0036] The exemplary embodiments disclosed in the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the specific embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope disclosed in the present application to those skilled in the art.

[0037] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features known in the art are not described; that is, all features of the actual embodiments are not described here, and well-known functions and structures are not described in detail.

[0038] In the drawings, the size of components, mechanisms, gaps and their relative sizes may be exaggerated for clarity. Like reference numerals denote like elements throughout.

[0039] It should be understood that when a component or mechanism is referred to as "on ...", "adjacent to ...", "connected to" or "coupled to" other components or mechanisms, it can be directly on, adjacent to, connected to or coupled to other components or mechanisms, or there can be intermediate components or mechanisms. On the contrary, when a component or mechanism is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" or "directly coupled to" other components or mechanisms, there is no intermediate component or mechanism. It should be understood that although the terms first, second, third, etc. can be used to describe various components, mechanisms, gaps and / or parts, these components, mechanisms, gaps and / or parts should not be limited by these terms. These terms are only used to distinguish one component, mechanism, gap or part from another component, mechanism, gap or part. Therefore, without departing from the teachings of the present application, the first component, mechanism, gap or part discussed below can be expressed as the second component, mechanism, gap or part. And when the second component, mechanism, gap or part is discussed, it does not indicate that the present application necessarily has the first component, mechanism, gap or part.

[0040] Spatially relative terms such as "under", "beneath", "below", "under", "above", "above", etc., may be used herein for convenience of description to describe the relationship of one component or feature shown in the figures to other components or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the drawings is turned over, then the components or features described as "under the other components" or "beneath" or "below" will be oriented as "above" the other components or features. Therefore, the exemplary terms "under" and "under" may include both upper and lower orientations. The components may be oriented otherwise (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0041] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present application. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0042] In order to thoroughly understand the present application, detailed steps and detailed structures will be presented in the following description to illustrate the technical solution of the present application. The preferred embodiments of the present application are described in detail below, but in addition to these detailed descriptions, the present application may also have other implementation methods.

[0043] The present application embodiment provides a damping rotating member, such as Figure 1-Figure 5As shown, it includes: a stator 1, a rotor 2 and a one-way damping member. The stator 1 includes a stator body 11 and a plurality of first annular walls 12, and the plurality of first annular walls 12 are fixed to the stator body 11; the rotor 2 includes a rotor body 21 and a plurality of second annular walls 22, and the plurality of second annular walls 22 are fixed to the rotor body 21; the rotor 2 is connected to the stator 1, the second annular wall 22 is adjacent to the first annular wall 12, and there is a gap between the first annular wall 12 and the adjacent second annular wall 22, and the gap is used to accommodate a liquid medium to provide a damping force when the rotor 2 rotates. The one-way damping member is connected to the rotor 2. When the one-way damping member is rotated in a first direction, the one-way damping member rotates relative to the rotor 2. When the one-way damping member is rotated in a second direction, the one-way damping member drives the rotor 2 to rotate synchronously, and the liquid medium provides a damping force for the rotation of the rotor 2. The second direction is the opposite direction of the first direction, that is, if the first direction is clockwise, the second direction is counterclockwise; if the first direction is counterclockwise, the second direction is clockwise.

[0044] Among them, the stator 1 and the rotor 2 are connected, and relative rotation can be generated between the two. The rotation of the rotor 2, in this embodiment, mainly refers to the rotation of the rotor 2 relative to the stator 1; and the stator 1 can be completely stationary in the external reference system, or the movement in the external reference system is very small and can be ignored. Ideally, the first annular wall 12 and the second annular wall 22 should be circular or arc-shaped, but in actual production, limited by processing accuracy or measurement accuracy, the first annular wall 12 and the second annular wall 22 can also be elliptical or elliptical arcs.

[0045] like Figure 1 As shown, two first annular walls 12 are provided, and three second annular walls 22 are provided. In addition to the above situation, the number of the first annular wall 12 and the second annular wall 22 can obviously be other numbers, for example, one first annular wall 12 and one second annular wall 22 are provided, or three first annular walls 12 are provided, and two second annular walls 22 are provided. It can be understood that the more the number of the first annular walls 12 and the second annular walls 22 is provided, the larger the total area of ​​the first annular walls 12 and the second annular walls 22 in contact with the liquid medium is, and a greater damping force can be generated.

[0046] The above-mentioned liquid medium needs to have a certain adhesion. It is understandable that when the adhesion is within an appropriate range, the damping force generated will also be within an appropriate range. The liquid medium used in this embodiment takes grease as an example. In order to prevent the liquid from freely moving on the first annular wall 12 and the second annular wall 22 and making its adhesion effect insignificant, the distance between the first annular wall 12 and the adjacent second annular wall 22 needs to be set within a preset range. Taking grease as an example, the preset range is 0.10 to 0.20 mm, preferably 0.15 mm.

[0047] The damping rotating member provided in the embodiment of the present application belongs to a one-way disc damper, whose stator 1 has a plurality of first annular walls 12, and whose rotor 2 has a plurality of second annular walls 22. After grease is injected between the second annular walls 22 and the first annular walls 12, an oil film is formed between the grease and the wall surface, and the grease produces adhesion to the wall surface. When the rotor 2 rotates relative to the stator 1, it needs to get rid of the adhesion force, and then the rotor 2 generates a damping force when it rotates. The setting of the one-way damping member can avoid the damping force when rotating in the first direction, and use the damping force when rotating in the second direction. When the damping rotating member is applied to the seat armrest, the damping force can be used to reduce the falling speed of the seat armrest when it is flipped down, and improve the problem of abnormal noise when the seat armrest falls, and there is no damping feeling when the armrest is lifted, which improves the smoothness and operation texture of the user's operation.

[0048] In an optional embodiment, if Figure 1 , Figure 2 As shown, the one-way damping member includes a one-way bearing 3, and the one-way bearing 3 includes an outer ring 31 and an inner ring 32; the outer ring 31 is connected to the rotor 2;

[0049] The stator 1 is used to connect to the seat, and the inner ring 32 is used to connect to the armrest of the seat;

[0050] When the handrail is lifted, the one-way bearing 3 is rotated along the first direction, and the inner ring 32 rotates relative to the outer ring 31;

[0051] When the handrail falls, the one-way bearing 3 rotates along the second direction, and the inner ring 32 drives the outer ring 31 and the rotor 2 to rotate synchronously.

[0052] In this embodiment, when the handrail falls, the inner ring 32 of the one-way bearing 3 is stationary relative to the outer ring 31, and the one-way bearing 3 is equivalent to a general connecting piece. At this time, the rotor 2 rotates relative to the stator 1. Since the rotor 2 is subjected to the damping force, the handrail falls smoothly, is not easy to produce abnormal noise, and the user experience is better. When the user lifts the handrail, the inner ring 32 of the one-way bearing 3 rotates relative to the outer ring 31, and the one-way bearing 3 is equivalent to a general bearing, so the handrail can be easily rotated, the operation is easy, and the user experience is better. It can be understood that since the rotation direction of the one-way bearing 3 is unidirectional, when installing the one-way bearing 3, it is necessary to follow the direction indicated by the one-way bearing 3 and install the one-way bearing 3 so that the rotatable direction conforms to the rotation direction of the handrail when it is lifted.

[0053] In an optional embodiment, if Figure 1 As shown, the center of the rotor 2 has a slot 24 for the one-way bearing 3 to be inserted into. The arrangement of the slot 24 can facilitate the installation of the one-way bearing 3, and the inner wall profile of the slot 24 can be designed to match the outer wall profile of the outer ring 31. For example, in this embodiment, Figure 1As shown, the inner wall profile of the slot 24 and the outer wall profile of the outer ring 31 are designed to be flower-shaped so that the two can be matched in transmission.

[0054] In an optional embodiment, if Figure 4 , Figure 5 As shown, the first annular wall 12 and the second annular wall 22 are arranged alternately. The alternating arrangement here means that after the stator 1 and the rotor 2 are assembled, for example, there is a first annular wall 12 located at the innermost side, and the second inner side should be the second annular wall 22, and the arrangement to the outer side should be the first annular wall 12 and the second annular wall 22 cycle in sequence. Under this arrangement structure, the utilization rate of the liquid medium between the first annular wall 12 and the second annular wall 22 is higher, which is conducive to achieving the required damping force with a smaller number of first annular walls 12 and second annular walls 22.

[0055] In an optional embodiment, if Figure 1-Figure 4 As shown, the damping rotating member further includes a bottom plate 4 and a cover plate 5, the cover plate 5 is fixed to one side of the bottom plate 4, a chamber is formed between the cover plate 5 and the bottom plate 4, and the stator 1 and the rotor 2 are located in the chamber. In this embodiment, the chamber formed by the bottom plate 4 and the cover plate 5 can be convenient for accommodating and protecting the stator 1 and the rotor 2 therein, and can also be convenient for limiting the range of movement of the stator 1 and the rotor 2, which is conducive to more stable rotation of the stator 1 and the rotor 2.

[0056] In an optional embodiment, if Figure 4 , Figure 5 As shown, the damping rotating member also includes a plurality of sealing rings 6, which are located between at least two of the base plate 4, the cover plate 5, the rotor body 21, and the stator body 11, and are used to seal the liquid medium in the chamber; a channel is formed between the base plate 4 and the rotor body 21, and one side of the rotor body 21 has a plurality of through holes 23, one end of the through hole 23 is connected to the gap, and the other end of the through hole 23 is connected to the channel.

[0057] In this embodiment, if Figure 4 As shown, the range of liquid medium circulation is limited to the chamber by three sealing rings 6 (one is located between the outer periphery of the stator body 11 and the bottom plate 4, one is located between the inner periphery of the rotor body 21 and the bottom plate 4, and one is located between the inner periphery of the stator body 11 and the inner periphery of the rotor body 21). Due to the setting of the through hole 23, the grease in the gap can flow into the channel, and the grease in the channel can also flow into the gap, so that the grease between different gaps can be intercommunication, which is conducive to the average distribution of grease in each gap. That is, the average distribution of damping force between each first annular wall 12 and the second annular wall 22 is achieved.

[0058] In an optional embodiment, if Figure 3As shown, the bottom plate 4 includes a bottom plate body 41 and a clip 42 distributed on the edge of the bottom plate body 41, and the clip 42 is clipped to the cover plate 5. In this embodiment, the clip 42 of the bottom plate body 41 can be easily fixed to the cover plate 5, reducing the cost of the fixing parts. Specifically, the clip 42 can be clipped to the edge of the cover plate 5 or the inner side of the cover plate 5. The clip 42 can be an independent component fixed to the bottom plate body 41, or it can be formed on the bottom plate body 41 by cutting or other methods.

[0059] In an optional embodiment, if Figure 1 As shown, the stator 1 also includes a block 14, which is fixed to one side of the stator body 11; the cover plate 5 has a slot 51 corresponding to the block 14, and the block 14 is inserted into the slot 51. In this embodiment, the stator 1 and the cover plate 5 can be quickly fixed by the above-mentioned limiting structure, so that the stator 1 remains stable. In this embodiment, the number of blocks 14 and slots 51 is set to 3. In other embodiments, other numbers can obviously be set, such as 1 or 2, or more than 4. It can be understood that the cooperation between the block 14 and the slot 51 is to ensure that the stator 1 does not rotate relative to the cover plate 5, that is, when the cover plate 5 is fixed, the stator 1 is also fixed. Therefore, in other embodiments, the stator 1 can also be fixed by other means, not limited to the cooperation between the block 14 and the slot 51, such as welding fixation, screw fixation, etc.

[0060] In an optional embodiment, if Figure 2 As shown, grease is filled between the first annular wall 12 and the second annular wall 22, and the first annular wall 12 has a through hole 13. The function of the through hole 13 is to allow the liquid medium to flow. The through hole 13 can be a through hole, a notch or a slit, etc., with the requirement that the liquid medium can flow. At least the through hole 13 can be set on part of the first annular wall 12, or on all of the first annular wall 12, or on part of the second annular wall 22, or on all of the second annular wall 22, and the through hole 13 can also be partially set on the first annular wall 12 and partially set on the second annular wall 22. The ultimate goal is to ensure that the liquid medium can flow between different gaps, so that the liquid medium is evenly distributed in each gap, and the damping force of each part of the damping rotating part is balanced. When the damping rotating part is used, grease needs to be filled between the first annular wall 12 and the second annular wall 22, but grease is a consumable or additive, which is not necessary when the damping rotating part is shipped or sold, and the user can add it by himself.

[0061] This embodiment provides a chair armrest, comprising the above-mentioned damping rotating member and an armrest body, wherein the rotating shaft of the armrest body is connected to the one-way damping member. The chair armrest is used to be assembled to one side of a seat, wherein a bottom plate 4 is fixed on the seat, such as Figure 2As shown, the bottom plate 4 is prefabricated with a connection hole 43 for the fixing member to pass through, so as to fix the bottom plate 4 to one side of the seat. After the bottom plate 4 and the seat are fixed, the stator 1 is fixed accordingly. Since the rotor 2 is subjected to a damping force when rotating relative to the stator 1, the armrest body provided in this embodiment is subjected to the damping force during the downward turning process, and the falling speed is slow, thereby improving the problem of abnormal noise when the seat armrest falls. When the armrest is lifted up, there is no damping feeling because the one-way damping member can rotate, thereby improving the smoothness and operation texture of the user's operation.

[0062] In this embodiment, the damping force value of the damping rotating part can be adjusted according to the weight of the armrest body, the center of mass distance, and the operating force requirements of the customer to meet the requirements of different customers.

[0063] It should be understood that the above embodiments are exemplary and are not intended to include all possible implementations included in the claims. Various modifications and changes may be made on the basis of the above embodiments without departing from the scope of the present disclosure. Similarly, the various technical features of the above embodiments may be arbitrarily combined to form other embodiments of the present application that may not be explicitly described. Therefore, the above embodiments only express several implementations of the present application and do not limit the scope of protection of the patent of this application.

Claims

1. A damping rotating member, characterized in that: include: A stator (1), the stator (1) comprising a stator body (11) and a plurality of first annular walls (12), the plurality of first annular walls (12) being fixed to the stator body (11); A rotor (2), the rotor (2) comprising a rotor body (21) and a plurality of second annular walls (22), the plurality of second annular walls (22) being fixed to the rotor body (21); the rotor (2) being connected to the stator (1), at least a portion of the second annular walls (22) being adjacent to the first annular wall (12), a gap being present between the first annular wall (12) and the adjacent second annular walls (22), the gap being used to accommodate a liquid medium; a one-way damping member connected to the rotor (2), wherein when the one-way damping member is rotated in a first direction, the one-way damping member rotates relative to the rotor (2); When the one-way damping element is rotated in a second direction, the one-way damping element drives the rotor (2) to rotate synchronously, and the liquid medium provides a damping force for the rotation of the rotor (2), wherein the second direction is the opposite direction of the first direction.

2. The damping rotating member according to claim 1, characterized in that: The one-way damping member comprises a one-way bearing (3), and the one-way bearing (3) comprises an outer ring (31) and an inner ring (32); the outer ring (31) is connected to the rotor (2); When the one-way bearing (3) is rotated along the first direction, the inner ring (32) rotates relative to the outer ring (31); When the one-way bearing (3) is rotated along the second direction, the inner ring (32) drives the outer ring (31) and the rotor (2) to rotate synchronously.

3. The damping rotating member according to claim 2, characterized in that: The center of the rotor (2) is provided with a slot (24) for the one-way bearing (3) to be inserted into.

4. The damping rotating member according to any one of claims 1 to 3, characterized in that: The first annular walls (12) and the second annular walls (22) are arranged alternately.

5. The damping rotating member according to any one of claims 1 to 3, characterized in that: The damping rotating member further comprises a base plate (4) and a cover plate (5), wherein the cover plate (5) is fixed to one side of the base plate (4), a chamber is formed between the cover plate (5) and the base plate (4), and the stator (1) and the rotor (2) are located in the chamber.

6. The damping rotating member according to claim 5, characterized in that: The damping rotating member further comprises a plurality of sealing rings (6), wherein the sealing rings (6) are located between at least two of the base plate (4), the cover plate (5), the rotor body (21), and the stator body (11), and are used to seal the liquid medium in the chamber; a channel is formed between the base plate (4) and the rotor body (21), and one side of the rotor body (21) has a plurality of through holes (23), one end of the through hole (23) is connected to the gap, and the other end of the through hole (23) is connected to the channel.

7. The damping rotating member according to claim 5, characterized in that: The stator (1) and the cover plate (5) are connected via a limiting structure.

8. The damping rotating member according to claim 7, characterized in that: The limiting structure comprises a clamping block (14) fixed to one side of the stator body (11) and a clamping slot (51) on the cover plate (5), and the clamping block (14) is clamped in the clamping slot (51).

9. The damping rotating member according to any one of claims 1 to 3, characterized in that: At least a portion of the first annular wall (12) or the second annular wall (22) has a through hole (13) for the liquid medium to flow through.

10. A chair armrest, characterized in that: It comprises the damping rotating member and an armrest body as described in any one of claims 1 to 9, wherein the rotating shaft of the armrest body is connected to the one-way damping member.

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