Rotatable backrest structure of corner sofa

Abstract

The utility model relates to a rotatable backrest structure of corner sofa, include: corner sofa main part, support rod, vertical setting in corner sofa main part, sofa backrest, fixed mounting in the top of support rod, and located corner sofa main part outside, locking assembly, set up between corner sofa main part and support rod, locking assembly includes mutually adapted first locking piece and second locking piece, first locking piece fixed mounting is on corner sofa main part, and second locking piece sets up on support rod, wherein, under the condition that first locking piece and second locking piece separate, support rod relative first locking piece axial rotation, at this moment, support rod relative first locking piece can carry out axial rotation, and the user needs to adjust the direction of sofa backrest, through separating the two locking pieces, can easily rotate support rod to make sofa backrest revolve around vertical axle, realized the flexible change of backrest direction, satisfies the demand of backrest direction under different use scene.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a rotatable backrest structure for a corner sofa. Background Technology

[0002] As people's living standards continue to improve, their demands for the functionality and comfort of furniture are also increasing. As an indispensable part of home life, the performance and user experience of sofas are receiving considerable attention.

[0003] In existing technologies, the structure of traditional sofas is relatively fixed. Typically, the relative positions and connection methods of the various components of a sofa are determined during the design and manufacturing stages. This fixed structure results in poor versatility when facing different usage scenarios and diverse user needs.

[0004] Among these issues, the design of sofa backrests is particularly problematic. Currently, most sofas have fixed backrest orientations, making it impossible to adjust them to suit different needs. This limitation severely restricts the sofa's usability. For example, when hosting a party in the living room and wanting to adjust the sofa layout to accommodate various social interactions, a fixed-back sofa's inability to flexibly change direction makes it difficult for users to achieve optimal communication angles and a comfortable experience. Similarly, when watching television or enjoying an indoor view, a fixed backrest prevents users from easily adjusting their posture and viewing angle, reducing the sofa's functionality and user satisfaction.

[0005] Furthermore, in some living environments with limited space, fixed-structure sofas are difficult to adapt to changes in spatial layout through flexible adjustments, increasing the difficulty of space utilization. This limitation of limited usage scenarios not only affects the practicality of sofas but also fails to fully meet modern consumers' pursuit of intelligent, multifunctional, and personalized home furnishing products. Utility Model Content

[0006] (a) Technical problems to be solved In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a rotatable backrest structure for a corner sofa, which solves the technical problems of the prior art, such as the sofa structure being relatively fixed, poor versatility, and the sofa backrest being unable to rotate, resulting in a single usage scenario and great limitations.

[0007] (II) Technical Solution To achieve the above objectives, the main technical solutions adopted by this utility model include: This utility model embodiment provides a rotatable backrest structure for a corner sofa.

[0008] This utility model provides a rotatable backrest structure for a corner sofa, comprising: Corner sofa body; The support rod is vertically installed inside the main body of the corner sofa; The sofa backrest is fixedly installed at the top of the support rod and is located outside the main body of the corner sofa; A locking assembly is provided between the main body of the corner sofa and the support rod. The locking assembly includes a first locking member and a second locking member that are mutually adapted to each other. The first locking member is fixedly installed on the main body of the corner sofa, and the second locking member is provided on the support rod. Specifically, when the first locking member and the second locking member are separated, the support rod rotates axially relative to the first locking member; when the first locking member and the second locking member are engaged and connected, the support rod moves axially relative to the first locking member.

[0009] Optionally, the first locking member has a toothed groove inside, and the second locking member is fitted into the toothed groove.

[0010] Optionally, it also includes: A limiting component is installed between the main body of the corner sofa and the support rod to restrict the support rod from moving along its axial direction.

[0011] Optionally, the limiting component includes: The fixed ball is fixedly installed on the support rod; The elastic component is fixedly installed on the main body of the corner sofa and elastically engaged with the fixed ball.

[0012] Optionally, when the fixed ball is located above the elastic member, the second locking member separates from the first locking member; With the fixed ball located below the elastic element, the second locking element engages with the first locking element.

[0013] Optionally, it also includes: The indicator component is located between the main body of the corner sofa and the support rod, and is used to indicate the rotation angle of the support rod when it rotates axially.

[0014] Optionally, the prompt component includes: The rotating component is coaxially fixedly mounted on the support rod; The indicator groove is formed annularly and equidistantly on the side wall of the rotating component; A damping component is installed on the main body of the corner sofa. When the damping component is in the indicator groove, the damping component provides damping force to the rotating part.

[0015] Optionally, the damping member includes: The locking ball is slidably installed inside the corner sofa and connects with the indicator slot; An elastic reset element is located between the locking ball and the corner sofa body to apply a force to the locking ball toward the rotating element.

[0016] Optionally, there are at least two damping components, which are arranged in a ring at equal intervals on the corner sofa body with the axis of the rotating component as the center.

[0017] (III) Beneficial Effects The beneficial effects of this utility model are as follows: The rotatable backrest structure of a corner sofa of this utility model includes a corner sofa body, a support rod, a sofa backrest, and a locking assembly. The locking assembly consists of a first locking member and a second locking member that are mutually adapted. When the first locking member and the second locking member are separated, the support rod can rotate axially relative to the first locking member. When the user needs to adjust the direction of the sofa backrest, they can easily rotate the support rod by separating the two locking members, thereby allowing the sofa backrest to rotate around the vertical axis. This achieves flexible changes in the backrest direction, meeting the needs of different usage scenarios and effectively solving the problems of poor sofa versatility and limited usage scenarios in existing technologies. The flexible rotation of the sofa backrest and the possible height adjustment function greatly satisfy the user's needs for using the sofa in different scenarios, enhancing the sofa's usability and user experience. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the rotatable backrest structure of the corner sofa of this utility model; Figure 2 This is a three-dimensional structural diagram of the support rod of this utility model; Figure 3 This is a cross-sectional view of the rotatable backrest structure of the corner sofa of this utility model.

[0019] [Explanation of Labels in the Attached Image] 100 - Corner sofa body, 200 - Support rod, 300 - Sofa backrest, 400 - Locking component, 500 - Limiting component, 600 - Warning component; 410 - First locking element, 420 - Second locking element; 510 - Fixed ball, 520 - Elastic element; 610 - Rotating component; 620 - Damping component; 621-Locking ball, 622-Elastic reset element; 401-tooth groove, 601-indication groove. Detailed Implementation

[0020] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper," "lower," etc., are used interchangeably with other directional terms. Figure 1 The orientation is used as a reference.

[0021] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0022] like Figures 1 to 3 As shown, this embodiment proposes a rotatable backrest structure for a corner sofa, including: a corner sofa body 100; a support rod 200, vertically disposed within the corner sofa body 100; a sofa backrest 300, fixedly installed at the top of the support rod 200 and located outside the corner sofa body 100; and a locking assembly 400 disposed between the corner sofa body 100 and the support rod 200. The locking assembly 400 includes a first locking member 410 and a second locking member 420 that are mutually adapted to each other. The first locking member 410 is fixedly installed on the corner sofa body 100, and the second locking member 420 is disposed on the support rod 200. When the first locking member 410 and the second locking member 420 are separated, the support rod 200 rotates axially relative to the first locking member 410. When the first locking member 410 and the second locking member 420 are engaged, the support rod 200 moves axially relative to the first locking member 410.

[0023] This application provides a rotatable backrest structure for a corner sofa, comprising a corner sofa body 100, a support rod 200, a sofa backrest 300, and a locking assembly 400. The support rod 200 is vertically disposed within the corner sofa body 100, providing a stable support axis for the sofa backrest 300. The support rod 200 serves as the supporting base for the sofa backrest 300: the sofa backrest 300 is fixedly installed on the top of the support rod 200. The stability of the support rod 200 directly determines the supporting strength of the sofa backrest 300. At the same time, the sofa backrest 300 can rotate with the rotation of the support rod 200, realizing the turning function of the backrest.

[0024] The sofa backrest 300 is fixedly installed at the top of the support rod 200 and located outside the corner sofa body 100. The locking assembly 400 consists of a first locking member 410 and a second locking member 420 that are mutually adapted to each other. The different engagement states of the two determine the movement mode of the support rod 200: When the first locking member 410 and the second locking member 420 are separated, the support rod 200 can rotate axially relative to the first locking member 410. When the user needs to adjust the direction of the sofa backrest 300, by separating these two locking members, the user can easily rotate the support rod 200, thereby allowing the sofa backrest 300 to rotate around the vertical axis, realizing flexible changes in the backrest direction and meeting the needs of different usage scenarios. This design is convenient to operate, and users can complete the adjustment without complicated tools or operating steps. When the first locking member 410 and the second locking member 420 are engaged, the support rod 200 can move axially relative to the first locking member 410. By this axial movement, the state of the first locking member 410 and the second locking member 420 can be changed to achieve engagement or disengagement.

[0025] In summary, the cooperation of the aforementioned components effectively solves the problems of poor versatility and limited usage scenarios in existing sofa technologies. The flexible rotation of the sofa backrest and the possibility of height adjustment greatly meet users' needs for using the sofa in different scenarios, thereby enhancing the sofa's value and user experience.

[0026] like Figure 2 and Figure 3 As shown, in some examples, the first locking member 410 has a toothed groove 401 formed inside, and the second locking member 420 is fitted into the toothed groove 401.

[0027] In this technical solution, a toothed groove 401 is machined inside the first locking member 410. The toothed structure of the toothed groove 401 can better fit with the second locking member 420. Through the tight meshing between the teeth, the two are more stable when connected, ensuring the overall stability of the locking assembly 400.

[0028] When it is necessary to rotate the support rod 200 axially relative to the first locking member 410, that is, to adjust the direction of the sofa back 300, the second locking member 420 is completely separated from the toothed groove 401, so that the support rod 200 can rotate freely around its axis.

[0029] When the first locking member 410 and the second locking member 420 are connected together, the first locking member 410 and the second locking member 420 are coaxially arranged. Under the action of the toothed structure, the first locking member 410 and the second locking member 420 cannot rotate relative to each other axially, but can only move relative to each other axially. This state achieves the angle fixation between the sofa backrest 300 and the corner sofa body 100.

[0030] like Figure 2 and Figure 3 As shown, in some examples, the rotatable backrest structure of the corner sofa further includes a limiting component 500, disposed between the corner sofa body 100 and the support rod 200, for limiting the axial movement of the support rod 200. The limiting component 500 includes: a fixing ball 510, fixedly mounted on the support rod 200; and an elastic member 520, fixedly mounted on the corner sofa body 100, elastically engaging with the fixing ball 510. When the fixing ball 510 is above the elastic member 520, the second locking member 420 is separated from the first locking member 410; when the fixing ball 510 is below the elastic member 520, the second locking member 420 engages with the first locking member 410.

[0031] In this technical solution, the limiting component 500 is disposed between the corner sofa body 100 and the support rod 200. Its main function is to restrict the support rod 200 from moving along its axial direction, thereby changing the limiting of the engagement or disengagement between the first locking member 410 and the second locking member 420. The limiting component 500 consists of a fixed ball 510, which is fixedly installed on the support rod 200 and moves with the support rod 200. The positional change of the fixed ball 510 can reflect the axial position of the support rod 200, and through its interaction with the elastic member 520, it provides a position feedback mechanism for the system.

[0032] The elastic element 520 is fixedly installed on the corner sofa body 100. It is elastically engaged with the fixed ball 510. The elastic element 520 can generate appropriate force when engaged with the fixed ball 510. It can maintain the stability of the connection when the fixed ball 510 is in different positions, and can also allow the fixed ball 510 to move relative to each other when needed, so as to achieve the switching of different working states.

[0033] For example, the elastic element 520 is an elastically deformable metal ring plate, which is fixedly installed on the corner sofa body 100. When the fixed ball 510 passes through the middle position of the elastic element 520, the elastic element 520 can be elastically deformed briefly and then return to its original shape.

[0034] When the fixed ball 510 is above the elastic member 520, the second locking member 420 is separated from the first locking member 410. At this time, the state of the limiting component 500 indicates that the system is in a mode that allows the support rod 200 to rotate axially relative to the first locking member 410, which is to prepare for the turning operation of the sofa back 300. The positional relationship between the fixed ball 510 and the elastic member 520 determines the locking state of the entire locking component 400, so that the user can freely rotate the support rod 200 under appropriate conditions to drive the sofa back 300 to rotate, thus meeting the need to change the direction of the sofa back.

[0035] When the fixed ball 510 is below the elastic element 520, the second locking element 420 engages with the first locking element 410. At this time, the limiting assembly 500 restricts the position of the support rod 200 within its axial movement range. The connection between the first locking element 410 and the second locking element 420 allows the support rod 200 to move axially to change to a rotatable working state for the sofa backrest 300 without causing accidental rotation. In this way, the limiting assembly 500 clearly defines two different working modes, allowing the user to easily and conveniently switch between backrest rotation and height adjustment functions according to their needs.

[0036] like Figure 2 and Figure 3 As shown, in some examples, the rotatable backrest structure of the corner sofa also includes: a prompting component 600, disposed between the corner sofa body 100 and the support rod 200, used to prompt the rotation angle of the support rod 200 when it rotates axially. The prompting component 600 includes: a rotating member 610, coaxially fixedly mounted on the support rod 200; a prompting groove 601, formed annularly and equidistantly on the side wall of the rotating member 610; and a damping member 620, disposed on the corner sofa body 100, which provides damping force to the rotating member 610 when the damping member 620 is within the prompting groove 601.

[0037] In this technical solution, the prompting component 600 is set between the corner sofa body 100 and the support rod 200. Its core function is to provide a prompt on the rotation angle during the axial rotation of the support rod 200 (which drives the sofa back to rotate), so that the user can clearly understand the angle of the backrest rotation.

[0038] The rotating component 610 is coaxially fixedly installed on the support rod 200. The rotating component 610 can rotate synchronously with the rotation of the support rod 200, accurately reflecting the rotation angle of the support rod 200. The rotating component 610 serves as the carrier of the indicator slot 601. Its rotation drives the indicator slot 601 to move relative to the damping component 620, thus providing the hardware basis for angle indication. The indicator slots 601 are formed equidistantly in a ring on the side wall of the rotating component 610. The equidistant distribution of the indicator slots 601 is the key to achieving accurate angle indication. The interval between each indicator slot 601 represents a certain angle value. Users can judge whether the rotation position is stable by touch based on the position of the damping component 620 falling into different indicator slots 601, and also judge the angle between the sofa backrest 300 and the corner sofa body 100 by sight.

[0039] The damping component 620 is disposed on the corner sofa body 100. When the damping component 620 is in the prompting groove 601, it provides damping force to the rotating component 610.

[0040] When the user rotates the support rod 200 to change the angle of the sofa backrest 300, the rotating component 610 fixed to the support rod 200 rotates synchronously. Since the damping component 620 is fixed to the corner sofa body 100, the rotating component 610 carries the indicator slot 601 and moves relative to the damping component 620. As the rotation angle changes, the damping component 620 enters different positions of the indicator slot 601, at which point the damping force changes, creating a "clunk" or "jerk" feedback to the user, indicating that the current rotation angle is at a certain preset value. This angle indication method based on damping changes is simple, intuitive, and easy to operate. It does not require complex electronic or digital display devices, allowing users to naturally perceive and judge the rotation angle when rotating the sofa backrest.

[0041] The prompt component 600, through the synergistic action of the rotating component 610, the prompt groove 601, and the damping component 620, effectively provides users with a prompt function for the rotation angle of the sofa backrest without adding too many complicated operations or display devices. This further improves the functionality and ease of use of the rotatable backrest structure of the corner sofa, enhancing the product's competitiveness and user experience.

[0042] like Figure 3 As shown, in some instances, the damping member 620 includes: a locking ball 621, which is slidably mounted in the corner sofa body 100 and is connected to the prompting slot 601; and an elastic reset member 622, which is disposed between the locking ball 621 and the corner sofa body 100 and is used to apply a force toward the rotating member 610 to the locking ball 621.

[0043] In this technical solution, the locking ball 621 is slidably installed inside the corner sofa body 100. During the rotation of the backrest, as the rotating component 610 drives the indicator groove 601 to rotate together, the relative position of the locking ball 621 and the indicator groove 601 changes within the sliding installation trajectory. When the locking ball 621 falls into the groove of the indicator groove 601, it can fill part of the groove space, achieving a certain degree of "locking" of the rotating component 610. At this time, due to the additional contact and resistance, the resistance to rotating the sofa backrest will increase, producing a significant damping effect. The user can feel the jerking sensation during the rotation, indicating to the user that a specific rotation angle position has been reached. When the rotating component 610 continues to rotate and leaves the indicator groove 601, the locking ball 621 continues to slide within the corner sofa body 100, preparing to enter the next indicator groove 601. This cycle repeats, realizing a continuous angle indication function.

[0044] The elastic reset element 622 is disposed between the locking ball 621 and the corner sofa body 100. Its purpose is to apply a force toward the rotating element 610 to the locking ball 621. The elasticity of the elastic reset element 622 ensures that the locking ball 621 always maintains close contact with the side wall of the rotating element 610, especially at the position of the indicator groove 601. No matter when the rotating element 610 rotates past, the locking ball 621 can smoothly enter the indicator groove 601 under the action of the elasticity of the elastic element 622, ensuring the continuous generation of damping force. This allows the angle indicator function to operate stably and reliably throughout the entire sofa back rotation process.

[0045] When the corner sofa backrest rotates, the continuous force of the elastic element 622 pushes the locking ball 621 against the side wall of the rotating element 610. As the rotating element 610 rotates with the support rod 200, when the indicator groove 601 passes the locking ball 621, the locking ball 621 embeds into the indicator groove 601 under the action of elasticity, increasing the rotational resistance and providing the user with an angle change indication. As the rotation continues, after unlocking a certain indicator groove 601, due to the elasticity of the elastic element 622, the locking ball 621 will follow the rotating element 610 and smoothly slide to the next indicator groove 601, continuing to provide damping and angle indication. In this way, the synergistic effect of the locking ball 621 and the elastic element 622 constitutes a stable and effective damping and angle indication system, improving the usability and functionality of the entire rotatable backrest structure of the corner sofa.

[0046] like Figure 3 As shown, in some instances, there are at least two damping members 620, which are arranged in a ring at equal intervals on the corner sofa body 100 with the axis of the rotating member 610 as the center.

[0047] In this technical solution, at least two damping components 620 are used to enhance the accuracy and reliability of the angle indication. When the sofa backrest is rotated, causing the rotating component 610 to rotate, multiple damping components 620 at different positions sequentially generate damping feedback relative to the indication groove 601. This means that regardless of whether it is at the beginning, middle, or near the end of the rotation, there is a corresponding damping component 620 to indicate the rotation angle. Compared with a single damping component, multiple damping components 620 reduce the possibility of indication errors or untimely indications, allowing users to more accurately judge the rotation angle of the sofa backrest and precisely adjust the backrest to the appropriate angle position under different usage needs.

[0048] The equidistant ring distribution ensures that the contact pattern between each damping component 620 and the indicator groove 601 is basically the same throughout the entire 360° rotation range of the rotating component 610. No matter which direction the user starts to rotate the sofa back, the damping feedback pattern is similar. This uniformity makes the rotation process smoother and more fluid, and will not produce abruptness due to excessive or insufficient damping in some areas, providing the user with a stable and predictable operating experience.

[0049] Multiple damping components 620 are equidistantly distributed in a ring on the corner sofa body 100, which helps to evenly distribute the forces generated during rotation. The torsional force generated by the rotating component 610 during rotation is shared by the multiple damping components 620, avoiding the risk of structural damage caused by excessive local stress and extending the service life of the structure. This mechanical stability further ensures the reliability and durability of the entire rotatable backrest structure under long-term and frequent use.

[0050] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0052] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rotatable backrest structure of a corner sofa, characterized in that, include: Corner sofa body (100); A support rod (200) is vertically installed inside the corner sofa body (100); The sofa backrest (300) is fixedly installed on the top of the support rod (200) and located outside the corner sofa body (100); A locking assembly (400) is disposed between the corner sofa body (100) and the support rod (200). The locking assembly (400) includes a first locking member (410) and a second locking member (420) that are adapted to each other. The first locking member (410) is fixedly installed on the corner sofa body (100), and the second locking member (420) is disposed on the support rod (200). When the first locking member (410) and the second locking member (420) are separated, the support rod (200) rotates axially relative to the first locking member (410); when the first locking member (410) and the second locking member (420) are engaged, the support rod (200) moves axially relative to the first locking member (410).

2. The rotatable backrest structure of the corner sofa as described in claim 1, characterized in that: The first locking member (410) has a toothed groove (401) inside, and the second locking member (420) is fitted into the toothed groove (401).

3. The rotatable backrest structure of a corner sofa according to claim 1, wherein, Also includes: A limiting component (500) is disposed between the corner sofa body (100) and the support rod (200) to restrict the support rod (200) from moving along its axial direction.

4. The rotatable backrest structure of a corner sofa according to claim 1, wherein, The limiting component (500) includes: A fixed ball (510) is fixedly installed on the support rod (200); The elastic element (520) is fixedly installed on the corner sofa body (100) and elastically engaged with the fixed ball (510).

5. The rotatable backrest structure of the corner sofa as described in claim 4, characterized in that: When the fixed ball (510) is above the elastic member (520), the second locking member (420) separates from the first locking member (410); When the fixed ball (510) is located below the elastic member (520), the second locking member (420) engages with the first locking member (410).

6. The rotatable backrest structure of a corner sofa according to claim 1, wherein Also includes: A prompting component (600) is disposed between the corner sofa body (100) and the support rod (200) for prompting the rotation angle of the support rod (200) when the support rod (200) rotates axially.

7. The rotatable backrest structure of a corner sofa according to claim 6, wherein The prompting component (600) includes: The rotating component (610) is coaxially fixedly mounted on the support rod (200); A prompting groove (601) is formed annularly and equidistantly on the side wall of the rotating member (610); A damping member (620) is disposed on the corner sofa body (100). When the damping member (620) is in the prompting groove (601), the damping member (620) provides a damping force to the rotating member (610).

8. The rotatable backrest structure of a corner sofa according to claim 6, wherein, The damping member (620) includes: The locking ball (621) is slidably installed inside the corner sofa body (100) and is connected to the prompting slot (601); An elastic reset member (622) is disposed between the locking ball (621) and the corner sofa body (100) for applying a force toward the rotating member (610) to the locking ball (621).

9. The rotatable backrest structure of the corner sofa as described in claim 6, characterized in that: There are at least two damping components (620), and at least two damping components (620) are arranged in a ring at equal intervals on the corner sofa body (100) with the axis of the rotating member (610) as the center.

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