Support frame structure and sofa

Abstract

The utility model discloses a support frame assembly and sofa, support frame assembly includes support frame structure and support frame, and support frame is installed in support frame structure, and support frame structure is used for realizing the rotation of support frame, and support frame structure includes support frame body, track subassembly, sliding subassembly and rotation subassembly, and track subassembly is fixed on support frame body, and sliding subassembly is slidably connected with track subassembly, the length size of support frame is greater than its width size, and it is fixedly connected with rotation subassembly, and rotation subassembly is rotatably connected with sliding subassembly, and is configured as can rotate relative sliding subassembly under the action of external force, and support frame is configured as with rotation subassembly motion to first position, is in the adaptation sitting posture state, and support frame is configured as with rotation subassembly motion to second position, is in the adaptation lying posture state. This support frame assembly is compact, can realize the switching of sitting posture and lying posture, and can further adapt the efficient layout demand of small space.

Description

Technical Field

[0001] This utility model belongs to the field of sofa technology, specifically relating to a support frame structure and a sofa. Background Technology

[0002] In modern home environments, especially for small apartments or long and narrow living rooms, making efficient use of limited space has become a key requirement. Traditional living room layouts typically require separate sofas and chaise lounges to meet the user's sitting and reclining needs; understandably, this one-to-one correspondence between furniture and user posture not only requires a large amount of space but also leads to a cluttered spatial flow. Utility Model Content

[0003] In view of this, the present invention provides a support frame assembly and a sofa. The support frame assembly is compact and enables switching between sitting and reclining positions, thereby allowing the sofa to switch between these positions. Thus, users only need to configure a single sofa unit to meet their needs for either sitting or reclining. Understandably, the present invention is suitable for the efficient layout requirements of small spaces.

[0004] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a support frame assembly, including a support frame structure and a support frame. The support frame is mounted on the support frame structure, and the support frame structure is used to enable rotation of the support frame. The support frame structure includes a support frame body, a track assembly, a sliding assembly, and a rotating assembly. The track assembly is fixed to the support frame body, and the sliding assembly is slidably connected to the track assembly. The length dimension of the support frame is greater than its width dimension, and it is fixedly connected to the rotating assembly. The rotating assembly is rotatably connected to the sliding assembly and is configured to rotate relative to the sliding assembly under the action of an external force. The support frame is configured to be in a seated posture state when it moves to a first position with the rotating assembly, and to be in a reclining posture state when it moves to a second position with the rotating assembly.

[0005] In some embodiments, the support frame assembly includes two track assemblies, namely a first track and a second track, which are arranged at an angle; the first track has a sliding component slidably connected thereto, and a rotating component rotatably connected to the sliding component; the second track has a sliding component slidably connected thereto, and a rotating component rotatably connected to the sliding component.

[0006] The sliding assembly includes a slider and a fixed seat that are fixedly connected. The slider is slidably connected to the track assembly. At least a portion of the fixed seat is inserted into the rotating assembly to form a connection between the sliding assembly and the rotating assembly.

[0007] In some embodiments, the rotating assembly includes a connecting block that can rotate relative to the fixed base, the connecting block and the support frame being fixedly connected, and the support frame having a functional hole;

[0008] The connecting block has a first part, and the fixing seat has a second part; both the first part and the second part are inserted into the functional hole, and the first part surrounds the outside of the second part;

[0009] The rotating assembly further includes a friction pair unit, at least a portion of which is disposed between the first portion and the second portion.

[0010] In some embodiments, the friction pair unit includes a bushing and a friction element arranged sequentially from bottom to top. The bushing is located between the fixed seat and the connecting block, and a portion of the friction element is sleeved between the fixed seat and the connecting block. The upper part of the friction element is located on the upper side of the connecting block, and the lower part is located between the first portion and the second portion.

[0011] In some embodiments, an accommodating space is formed between the outer sidewall of the friction element, the inner sidewall of the functional hole, and the outer sidewall of the bushing. The accommodating space has or can generate a gap for the connecting block to move up and down, so that the support frame fixedly connected to the connecting block has the mobility to change its own height.

[0012] The support frame assembly further includes a limiting component, which includes a limiting block and an adapter seat. The limiting block is disposed on the support frame and has a spherical head. The adapter seat is disposed on the support frame body and has a groove into which the spherical head can be engaged. The spherical head is configured to be able to change position between a first height, a second height, and a third height.

[0013] The first height of the spherical head is lower than the second height; when the spherical head is at the second height, the spherical head can pass over the highest point of the groove; when the spherical head is at the third height, the spherical head sinks relative to when it is at the second height.

[0014] In some embodiments, the support frame assembly further includes a limiting component, which includes a limiting block and an adapter seat. The limiting block is disposed on the support frame and has a spherical head, and the adapter seat is disposed on the support frame body and has a groove into which the spherical head can be engaged. The spherical head is configured to be able to change position between a first height, a second height, and a third height.

[0015] The first height of the spherical head is lower than the second height; when the spherical head is at the second height, the spherical head can pass over the highest point of the groove; when the spherical head is at the third height, the spherical head sinks relative to when it is at the second height.

[0016] The limiting block or the adapter is mounted on the support frame body by a floating fastener, which allows the limiting block or the adapter to move in the vertical direction.

[0017] In some embodiments, the support frame body is provided with a guide groove, and a sliding member is connected to the support frame; the sliding member is configured to slide along the guide groove when the support frame rotates; the guide groove is configured to limit the rotational travel range of the support frame.

[0018] In some embodiments, the inner diameter of the functional hole of the support frame is larger than the outer diameter of the first part; there is a distance between the inner sidewall of the functional hole and the outer sidewall of the first part; the accommodating space is provided with a gap for the connecting block to move.

[0019] In some embodiments, the support frame has a first rotation angle adapted to a sitting posture and a second rotation angle adapted to a lying posture; when the support frame is in the first position, it is located at the first rotation angle; when the support frame is in the second position, it is located at the second rotation angle.

[0020] The support frame assembly includes two limiting blocks. The first limiting block is positioned such that when the support frame is at a first rotation angle, the spherical head of the first limiting block engages in the groove. The second limiting block is positioned such that when the support frame is at a second rotation angle, the spherical head of the second limiting block engages in the groove.

[0021] According to another aspect of this application, an embodiment of the present invention provides a sofa, the sofa including the above-mentioned support frame assembly and backrest, the support frame being located on the support frame structure, and a clearance for the support frame to rotate is provided between the backrest and the support frame.

[0022] In some embodiments, the backrest includes a fixing unit, a first movable plate, a second movable plate, and a linkage unit. One end of the fixing unit is fixed to the support frame structure, and the other end of the fixing unit is connected to one end of the first movable plate. The linkage unit is disposed on the side of the first movable plate, with one end connected to the fixing unit and the other end connected to the second movable plate. The middle part of the linkage unit is connected to the first movable plate. The linkage unit can drive the first movable plate and the second movable plate to fold.

[0023] Compared with the prior art, the support frame assembly of this utility model has at least the following beneficial effects:

[0024] The support frame assembly provided by this utility model includes a support frame structure and a support frame. The support frame is mounted on the support frame structure, and the support frame structure is used to realize the rotation of the support frame. The support frame structure includes a support frame body, a track assembly, a sliding assembly, and a rotating assembly. The track assembly is fixed to the support frame body, and the sliding assembly is slidably connected to the track assembly. The length dimension of the support frame is greater than its width dimension, and it is fixedly connected to the rotating assembly. The rotating assembly is rotatably connected to the sliding assembly and is configured to rotate relative to the sliding assembly under the action of an external force. The support frame is configured to be in a sitting posture state when it moves to a first position with the rotating assembly, and to be in a lying posture state when it moves to a second position with the rotating assembly.

[0025] To address the problem of traditional solutions requiring two separate pieces of furniture—a sofa and a recliner—which occupy space and lead to cramped living spaces and cluttered layouts in small apartments, this invention solves this problem by integrating sliding and rotating functions within the support frame structure. Specifically, the support frame body provides a compact integrated base; the cooperation of the track assembly and sliding assembly allows the support frame to be adjusted horizontally, while the rotating assembly allows the support frame to rotate relative to the track assembly. In the first position, the width of the support frame matches the width of the support frame body, creating a compact sitting support; in the second position, the length of the support frame extends using the space along the width of the support frame body, creating a reclining support. This invention replaces the traditional two pieces of furniture—a sofa and a recliner—by using only the support frame to adjust its position through sliding and to change its posture through rotation, significantly saving space. All movements are completed within the constraints of the support frame structure, avoiding the cluttered layout caused by haphazardly placing multiple pieces of furniture.

[0026] The sofa provided by this utility model is designed based on the above-mentioned support frame assembly. Its beneficial effects are the same as those of the above-mentioned support frame assembly, and will not be repeated here.

[0027] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional view of a support frame assembly provided in an embodiment of this utility model;

[0030] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0031] Figure 3 This is a partial exploded view of a support frame assembly provided in an embodiment of this utility model;

[0032] Figure 4 This is a top view of a support frame assembly provided in an embodiment of the present invention, after one of the support frames has been removed;

[0033] Figure 5 yes Figure 4 A cross-sectional view along the BB direction;

[0034] Figure 6 yes Figure 5 A magnified view of a section at point C;

[0035] Figure 7 This is a partially exploded view from another angle of a support frame assembly provided in an embodiment of this utility model;

[0036] Figure 8 This is a top view of a support frame assembly provided in an embodiment of the present utility model;

[0037] Figure 9 This is a structural schematic diagram of a support frame assembly provided in an embodiment of the present utility model;

[0038] Figure 10 This is a schematic diagram of the structure of a support frame assembly provided in an embodiment of the present invention, in which the support frame is in a rotating state;

[0039] Figure 11 This is a schematic diagram of the structure of a support frame assembly provided in an embodiment of the present invention, in which the support frame is locked at 90°.

[0040] Figure 12 This is a top view of a support frame assembly provided in an embodiment of the present invention, with the support frame locked at 90°.

[0041] Figure 13This is a schematic diagram of a sofa in a reclining position according to an embodiment of the present invention;

[0042] Figure 14 This is a side view of a sofa in a reclining position, provided by an embodiment of the present invention;

[0043] Figure 15 This is a side view of a sofa in a sitting position, provided by an embodiment of the present invention;

[0044] Figure 16 This is another structural diagram of a sofa in a reclining position provided by an embodiment of the present invention;

[0045] Figure 17 This is a schematic diagram of the structure of a sofa backrest and connecting rod assembly after being assembled, according to an embodiment of this utility model;

[0046] Figure 18 This is a partial structural disassembly diagram of the backrest portion of a sofa provided in an embodiment of this utility model.

[0047] Figure 19 This is a schematic diagram of the indicating accommodating space provided by an embodiment of the present utility model (for clarity, parts of the connecting block are partially hidden).

[0048] in:

[0049] 1. Support frame structure; 11. Support frame body; 12. Track assembly; 13. Sliding assembly; 14. Rotating assembly; 15. Limiting assembly; 16. Guide groove; 121. First track; 122. Second track; 131. Slider; 132. Fixed seat; 141. Connecting block; 142. Friction pair unit; 1421. Bushing; 1422. Friction component; 1423. Accommodation space; 14211. Upper skirt; 14212. Lower skirt; 151. Limiting block; 152. Adaptor seat; 2. Support frame; 21. Extension boss; 22. Sliding component; 211. Functional hole; 3. Backrest; 31. Fixed unit; 32. First movable plate; 33. Second movable plate; 34. Linkage unit; 35. First hinge shaft; 36. Second hinge shaft; 37. Connecting plate; 4. Clearance gap. Detailed Implementation

[0050] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0051] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0052] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] Example 1

[0054] This embodiment provides a support frame assembly, such as Figures 1 to 3 As shown, the support includes a support frame structure 1 and a support frame 2. The support frame 2 is mounted on the support frame structure 1, and the support frame structure 1 is used to realize the rotation of the support frame 2. The support frame structure 1 includes a support frame body 11, a track assembly 12, a sliding assembly 13, and a rotating assembly 14. The track assembly 12 is fixed to the support frame body 11, and the sliding assembly 13 is slidably connected to the track assembly 12. The length of the support frame 2 is greater than its width, and it is fixedly connected to the rotating assembly 14. The rotating assembly 14 is rotatably connected to the sliding assembly 13 and is configured to rotate relative to the sliding assembly 13 under the action of an external force. The support frame 2 is configured to move to a first position (see reference) with the rotating assembly 14. Figure 8 When in a seated position, the support frame 2 is configured to move to the second position (see reference) as the rotating component 14 moves. Figure 11 When in a suitable lying position.

[0055] Based on the above Figure 8 and Figure 11As can be seen, given that the length of the support frame 2 is greater than its width, and considering the rotatable design of the support frame 2, when the support frame 2 is rotated to the first position, its long side is in front and its wide side is on the side, allowing it to fit the user's hips (i.e., the user's sitting posture). When the support frame 2 is rotated from the first position to a second position, its long side is on the side and its wide side is in front, accommodating a reclining position, thus allowing it to fit the user's torso (i.e., the user's lying posture). Therefore, by applying this support frame structure to a sofa, with the user positioned on the same side of the sofa, they can meet their sitting or reclining needs by simply installing one sofa and adjusting the position of the support frame 2.

[0056] The following is a more detailed design example:

[0057] Assuming the support frame assembly provided in this embodiment is applied to a sofa, the support frame structure is the sofa's seat frame, and the support frame 2 is the sofa's seat frame; of course, it can also be applied to other structures.

[0058] In this embodiment, the support frame structure 1 constitutes the core frame, with its support frame body 11 serving as a fixed base. The track assembly 12 is fixedly mounted on the support frame body 11. The sliding assembly 13 is mounted on the track assembly 12 and can slide along its track direction. The lower end of the rotating assembly 14 is rotatably connected to the sliding assembly 13, and its upper end is fixedly connected to the support frame 2. The length dimension of the support frame 2 is greater than its width dimension. In the initial position, the width direction of the support frame 2 is approximately aligned with the width direction of the support frame body 11, and at this time, the support frame 2 does not significantly protrude from the support frame body 11. When the rotating assembly 14 rotates the support frame 2 by 90°, the length direction of the support frame 2 will extend along the width direction of the support frame body 11.

[0059] For example, the aforementioned initial position is the first position. After the rotating component 14 rotates the support frame 2 by 90°, the support frame 2 is in the second position. It is understood that those skilled in the art can adjust the first and second positions as needed.

[0060] As described above, in the first position, the support frame 2 is at a first rotation angle of 0°, and its width matches the width of the support frame body 11, indicating that the support frame 2 is in a position suitable for a sitting posture. Therefore, when a lying posture is required, an external force (e.g., the user's hand pushing) is applied to the support frame 2, causing the sliding component 13 to slide along the track component 12 fixed to the support frame body 11, and the rotating component 14 to rotate relative to the sliding component 13, with the support frame 2 rotating synchronously. When the support frame 2 moves to the second position, it has a second rotation angle of 90°. At this point, the length of the support frame 2 is arranged along the width of the support frame body 11, forming a state suitable for a lying posture.

[0061] Therefore, as mentioned earlier, this embodiment addresses the problem of traditional solutions requiring two separate pieces of furniture—a sofa and a recliner—which occupy space and lead to cramped living spaces and cluttered traffic flow in small apartments. This embodiment solves this problem by integrating sliding and rotating functions within the support frame structure 1. Specifically, the support frame body 11 provides a compact integrated base. The cooperation of the track assembly 12 and the sliding assembly 13 allows the support frame 2 to be adjusted horizontally, while the rotating assembly 14 allows the support frame 2 to rotate relative to the track assembly 12. At the 0° position, the width of the support frame 2 matches the width of the support frame body 11, forming a compact sitting support. After rotating 90°, the length of the support frame 2 extends using the space in the width direction of the support frame body 11, forming a reclining support. This embodiment replaces the traditional sofa and recliner furniture by using only the support frame 2 to adjust its position through sliding and to change its posture through a 90° rotation, significantly saving space. All movements are completed under the constraints of the support frame structure 1, avoiding the cluttered traffic flow caused by the arbitrary placement of multiple pieces of furniture.

[0062] For further details on specific embodiments, please refer to the following: Figures 2-4 The support frame assembly includes two track assemblies 12, namely a first track 121 and a second track 122, which are arranged at an angle, specifically in a figure-eight configuration. The first track 121 has a sliding assembly 13 slidably connected to it, and a rotating assembly 14 rotatably connected to the sliding assembly 13. The second track 122 also has a sliding assembly 13 slidably connected to it, and a rotating assembly 14 rotatably connected to the sliding assembly 13. The sliding assembly 13 includes a slider 131 and a fixed seat 132 fixedly connected to it. The slider 131 is slidably connected to the track assembly 12. The fixed seat 132 is as follows: Figure 2 The surface shown has an inverted T-shaped cross-section, with a portion of the fixed base 132 inserted into the rotating assembly 14 to form a connection between the sliding assembly 13 and the rotating assembly 14.

[0063] As mentioned above, in this embodiment, the fixed connection point of the fixed seat 132 and the slider 131 is located outside the part where the fixed seat 132 is inserted into the rotating assembly 14, and the specific connection method of the fixed seat 132 and the slider 131 is a threaded connection.

[0064] In a specific embodiment, such as Figure 2 As shown, the rotating assembly 14 includes a connecting block 141 rotatable relative to the fixed seat 132. The connecting block 141 is disposed below the extension boss 21 (the extension boss 21 is part of the support frame 2) of the support frame 2. The connecting block 141 has a first part that is inserted into the functional hole 211 of the extension boss 21, and the portion of the connecting block 141 outside the first part is fixed to the extension boss 21 by bolts. The fixed seat 132 has a second part that is inserted into the functional hole 211 of the extension boss 21. The first part surrounds the outside of the second part. The rotating assembly 14 also includes a friction pair unit 142, a portion of which is disposed between the first part and the second part. The friction pair unit 142 is in direct contact with the connecting block 141 and the fixed seat 132, and most of it is disposed between the first part of the connecting block 141 and the second part of the fixed seat 132.

[0065] Thus, as can be seen from the above, the core function of the aforementioned slider 131 is to provide a mechanical sliding interface with its mating track. Through its cooperation with the mating track, the force on the support frame 2 is converted into linear motion along the track, while simultaneously bearing the frictional load during the sliding process. The fixed seat 132 performs a dual function: firstly, it serves as the mounting base for the slider 131, achieving fixed support for the slider 131; secondly, through its insertion into the rotating component 14, it enables the rotational action of the rotating component 14 to be performed based on the current position of the sliding component 13.

[0066] Furthermore, the core function of the connecting block 141 is to realize relative rotation and force transmission. The core function of the friction pair unit 142 is to provide controllable frictional damping: the friction pair unit 142, with most of its portion disposed between the relative motion interface of the connecting block 141 and the fixed seat 132, generates frictional resistance when the two rotate relative to each other, which is used to adjust the smoothness of the rotation process and also to avoid excessive friction between the two.

[0067] Thus, while adjusting the horizontal position of the support frame 2, the rotating component 14 adaptively rotates relative to the insertion portion of the fixed base 132.

[0068] Furthermore, in this embodiment, the nested structure formed by the connecting block 141, the fixing seat 132 and the friction pair unit 142 can ensure the stability of rotation and prevent the support frame 2 from shaking.

[0069] For example, such as Figure 2As shown, the friction pair unit 142 includes a bushing 1421 and a friction element 1422 arranged sequentially from bottom to top; the friction element 1422 has a T-shaped cross-sectional structure; the bushing 1421 is located between the fixed seat 132 and the connecting block 141 and is supported by the fixed seat 132. A portion of the friction element 1422 is fitted between the fixed seat 132 and the connecting block 141, with the upper part of the friction element 1422 located above the connecting block 141 and the lower part located between the first part and the second part. Furthermore, a blind hole (for a threaded hole) is provided in the middle of the second part. Figure 2 (Indicated by a dashed arrow in the middle) is used to drive in parts such as bolts or screws. In this embodiment, it is a bolt, and the bolt head of the bolt is located on the upper side of the upper surface of the friction element 1422.

[0070] For example, after the support frame assembly is assembled, such as Figure 2 and Figure 19 As shown, the receiving space 1423, formed by the outer wall of the friction element 1422, the inner wall of the functional hole 211, and the inner wall of the bushing 1421, has or can generate a gap for the connecting block 141 to move up and down, thereby giving the support frame 2, which is fixedly connected to the connecting block 141, the ability to change its own height. It should be noted that the receiving space 1423 is actually an irregular annular space. Figure 19 The area is indicated by a box; although the boxed portion appears to be two separate parts due to the cross-sectional view, those skilled in the art can understand the specific location and shape of the accommodating space 1423. Furthermore, the "gap for the vertical movement of the connecting block 141" can be achieved by controlling the depth of the aforementioned blind hole, the dimensions of the friction element 1422, the dimensions of the connecting block 141, the dimensions of the bushing 1421, and the fitting details between the various parts, among other part design details. For ease of understanding, in Figure 2 The solid arrows in the middle indicate the possible locations of "gaps that allow the connecting block 141 to move up and down", which at least partially exist or can be generated.

[0071] For example, the bushing 1421 includes an upper skirt 14211 and a lower skirt 14212 that protrude relative to its hollow cylindrical body.

[0072] Furthermore, a more detailed description of the aforementioned "having or being able to generate" includes: exemplarily, after the bolt is inserted into the blind hole and installed, there is a distance between the lower surface of its bolt head and the upper surface of the friction element 1422. Figure 2 The gap d represents the distance between the two sides; under the influence of gravity in the absence of external force, such as... Figure 2As shown, the lower surface of the upper part of the first section contacts the upper skirt 14211 of the bushing 1421, thereby supporting the support frame 2 based on the bushing 1421 being supported by the sliding component 13. Furthermore, there is a gap between the lower skirt 14212 of the bushing 1421 and the lowermost surface of the connecting block 141, which is obtained by controlling the dimensions and fit of each part. Thus, when force is applied to the support frame 2, based on the upward movement of the friction member 1422, after the friction member 1422 is lifted by the connecting block 141, a gap is generated within the receiving space 1423 to allow for vertical movement between the support frame 2 and the connecting block 141. It can be understood that by controlling the fit and dimensions of each part, even if the friction member 1422 moves upward, the rotation of the support frame 2 is not affected. Further, the lifting of the friction member 1422 to generate the gap corresponds to the aforementioned "can generate"; the receiving space 1423 after the friction member 1422 is lifted corresponds to the aforementioned "has".

[0073] For example, the bushing 1421 and the friction element 1422 may be made of self-lubricating plastics, including but not limited to nylon and polyoxymethylene. It is understood that, given that the friction element 1422 has space to be lifted by the connecting block 141, the gap between the lower skirt 14212 and the lowermost surface of the connecting block 141 is not necessarily designed, but can be flexibly set by those skilled in the art as needed.

[0074] In this embodiment, the cooperation between the bushing 1421 and the friction element 1422 produces the following effects: ensuring relatively smooth rotation from 0° to 90° and controllable damping; and the layered cooperation of the two also avoids abnormal noise and wear from direct metal contact and prevents rotational jamming.

[0075] As described above, in a possible embodiment, the blind hole for mating with the aforementioned bolt can also be a through hole, and the slider 131 is further provided with a threaded hole aligned with the through hole; in this case, the aforementioned bolt or screw or similar part can be driven in, which can also form a connection point between the slider 131 and the fixed seat 132. Based on this, it can be understood that the fixed seat 132 in this solution can be only the aforementioned second part. Thus, the design principle of the fixed seat can include: at least a portion of the fixed seat 132 is inserted into the rotating assembly 14.

[0076] As described above, in possible embodiments, the design principle of the friction pair unit can be that at least a portion of it is disposed between the first part and the second part. For example, when the aforementioned bushing 1421 and its lower skirt 14212 are changed to be separate parts, and the lower skirt 14212 is considered not to belong to the friction pair unit 142, and the portion of the friction member 1422 located on the upper side of the first part and the friction member 1422 are changed to be separate parts, and this portion is considered not to belong to the friction pair unit 142, then the friction pair unit 142 is entirely disposed between the first part and the second part.

[0077] In a specific embodiment, such as Figure 5 , Figure 6 as well as Figure 7 As shown, the support frame assembly also includes a limiting component 15, which includes a limiting block 151 and an adapter seat 152. The limiting block 151 is disposed at the bottom of the support frame 2 and has a spherical head. The adapter seat 152 is disposed on the support frame body 11 (which may be the upper surface or the side) and its surface has a groove that can engage with the spherical head. The groove is lower in the middle and higher on both sides. The spherical head is configured to be able to change position between a first height, a second height, and a third height. The first height of the spherical head is lower than the second height. When the spherical head is at the second height, the spherical head can pass over the highest point of the groove. When the spherical head is at the third height, the spherical head sinks relative to the second height.

[0078] More specifically, in this embodiment, the spherical head is at a first height when it is not in the groove and the support frame 2 is not subjected to external force. The moment the spherical head is at the second height specifically refers to the instant when an external force pushes the support frame 2, causing the spherical head to hit the edge of the groove of the adapter seat. Under the push of the external force, the spherical head adaptively rises, thus changing to a height capable of crossing the groove. The reason the spherical head can change from the first height to the second height is due to the aforementioned "...having or being able to generate a gap for the connecting block 141 to move up and down, thereby giving the support frame 2, which is fixedly connected to the connecting block 141, the ability to change its own height." The support frame 2 can change its height, thus allowing the spherical head fixed to it to change its height; this principle can be considered as a lever.

[0079] As mentioned above, when the spherical head enters the groove under external force (e.g., force applied by a person), and then the external force is removed (e.g., the person releases their grip and no longer applies force to the support frame 2), it is easy to see that the spherical head will sink further. At this point, the support frame 2 has achieved basic positioning but has not yet borne the load of the human body. If the support frame 2 is subjected to force again at this point, the spherical head can easily flip over the groove again.

[0080] As mentioned above, when the user sits on the support frame 2, the user's weight presses down on the support frame 2, forcing the spherical head to sink completely within the groove. At this point, the spherical head will sink further than when it is at the second height, causing the spherical head to form a tight contact with the bottom of the groove under the action of gravity, generating a self-reinforcing clamping force. At this point, even if the spherical head is subjected to force, it can no longer easily flip over the groove, and the support frame 2 can be regarded as being in a locked position.

[0081] It should be noted that, as can be seen from the above, the relationship between the third height and the first height can be flexibly designed according to the needs of those skilled in the art, and the first height can be higher or lower than the third height. Given that "the accommodating space 1423...has or can generate a gap for the connecting block 141 to move up and down, thereby giving the support frame 2, which is fixedly connected to the connecting block 141, the ability to change its own height", as long as there is sufficient space, whether the first height is higher or lower than the third height only affects the position of the connecting block 141 within the functional hole 211.

[0082] As described above, the limiting component 15 of this embodiment solves the problem of traditional buckles being easily jammed or loosened through a three-stage height adaptive mechanism, and also enables the support frame 2 to have a certain position self-adjustment function, which can avoid stress concentration caused by manufacturing errors or deformation of the support frame assembly to a certain extent.

[0083] For example, the inner diameter of the functional hole 211 of the support frame 2 is larger than the maximum outer diameter of the friction pair unit 142 and the outer diameter of the first part; thus, there is a gap between the outer wall of the friction element 1422, the inner wall of the functional hole 211, and the inner wall of the bushing 1421, allowing the connecting block 141 to move. The degree of freedom of movement of the connecting block 141 and the support frame 2 can be further improved. Furthermore, during the rotation of the support frame 2, this design can reduce stress concentration at the friction interface due to non-uniform loads. This structure improves the reliability and service life of the rotating mechanism.

[0084] Alternatively, in possible embodiments, the above-described scheme of "accommodating space 1423... having or being able to generate a gap for the connecting block 141 to move up and down, thereby giving the support frame 2, which is fixedly connected to the connecting block 141, the ability to change its own height" may not be adopted.

[0085] The alternative design details include: the limiting block 151 is connected to the support frame 2 via a floating fastener (e.g., a floating spring screw / screw / bolt), or the adapter 152 is connected to the support frame body 11 via a floating fastener (e.g., a floating spring screw / screw / bolt). The floating fastener allows the limiting block 151 or the adapter 152 to move vertically. The vertical floating capability of the limiting block 151 or the adapter 152 directly solves the problem of tolerance in the fit between the limiting block 151 and the adapter 152. In a possible implementation, the compression of the spring in the floating fastener and its reset after the force disappears correspond to the vertical displacement of the limiting block 151 or the adapter 152. When the support frame 2 rotates to a preset angle, the spherical head of the limiting block 151 contacts the edge of the adapter seat 152. At this time, the floating fastener allows the limiting block 151 or the adapter seat 152 to move up or down instantly under pressure, providing adaptive clearance for the spherical head and allowing it to slide smoothly into the groove. With this design, the vertical floating of the limiting block 151 or the adapter seat 152 can also cover assembly error compensation and smooth operation requirements. In a specific embodiment, such as... Figure 3 As shown, the support frame body 11 is provided with a guide groove 16 to limit the rotational stroke range of the support frame 2; a sliding component 22 is fixedly provided at the bottom of the support frame 2; when the support frame 2 rotates, the sliding component 22 slides along the guide groove 16, so that the support frame 2 has a first rotation angle adapted to a sitting posture and a second rotation angle adapted to a lying posture; there are two limiting blocks 151. The position of the first limiting block 151 is configured such that when the support frame 2 is at the first rotation angle, the spherical head of the first limiting block 151 is engaged in the groove of the aforementioned adapter seat 152; the position of the second limiting block 151 is configured such that when the support frame 2 is at the second rotation angle, the spherical head of the second limiting block 151 is engaged in the groove of the aforementioned adapter seat 152.

[0086] More in detail, such as Figure 4 and Figure 7 As shown, the first limiting block 151 can be called the sitting limiting block; the second limiting block 151 can be called the lying limiting block. When the support frame 2 rotates to the first rotation angle, the spherical head of the sitting limiting block is inserted into the groove of the adapter 152, and the lying limiting block is located outside the adapter 152; when rotated to the second rotation angle, the spherical head of the sitting limiting block is located outside the groove of the adapter 152, and the spherical head of the lying limiting block is inserted into the groove of the adapter 152.

[0087] Understandably, the design of the sliding component 22 also forms a support point for the support frame 2 to a certain extent, increasing the stability of the support frame 2.

[0088] like Figures 8-12 As shown, in one embodiment, there are two support frames 2. Figure 8and Figure 9 This is the state when support frame 2 is locked at 0°, suitable for a sitting position. To switch to a lying position, the user manually pushes support frame 2 to rotate it, as shown below. Figure 10 As shown, it eventually rotates to Figure 11 and Figure 12 In this state, the support frame 2 is locked at 90° for the lying position.

[0089] Understandably, since the guide groove 16 is used to limit the rotational stroke range of the support frame 2, when the support frame 2 is used in an electric drive scenario (i.e., the support frame 2 no longer needs to be manually pushed to rotate but is driven by a motor), the guide groove 16 is an optional setting, and the rotational stroke range of the support frame 2 can be limited by setting the parameters of the electric drive component.

[0090] Example 2

[0091] This embodiment provides a sofa, such as Figure 13 and Figure 14 As shown, the sofa includes the support frame assembly of Embodiment 1 and the backrest 3. The support frame 2 is located on the support frame structure 1, the backrest 3 is disposed on the support frame structure 1, and a clearance gap 4 is provided between the backrest 3 and the support frame 2; rotating the support frame 2 allows the sofa to switch between a reclining position and a sitting position.

[0092] For example, the backrest 3 is independently fixed to the rear side of the support frame structure 1; the clearance 4 between the backrest 3 and the support frame 2 ensures that there is no obstruction to the movement of the backrest 3 when the support frame 2 rotates. The backrest 3 moves independently of the support frame 2, and adjusts the sofa's seat depth by folding itself under force (e.g., leaning forward to shorten the seat depth to adapt to the sitting posture, etc.). Figure 15 As shown; the reclining position increases the seat depth to accommodate a lying posture, such as... Figure 16 As shown in the figure, it meets the back support needs of different usage scenarios.

[0093] In addition, in one embodiment, there is no one-to-one correspondence between the state of the backrest 3 and different postures. That is, a sitting posture can be matched with a reclining backrest 3 or a forward-leaning backrest 3, and a lying posture can be matched with a reclining backrest 3 or a forward-leaning backrest 3.

[0094] Thus, it can be seen that the sofa provided in this embodiment can be positioned to switch between at least three modes, such as sitting (multiple people sitting together), deep sitting (curling up to read), and lying down (taking a nap or watching a movie). The displacement-free design allows the sofa to be placed against the wall or embedded in a cabinet, avoiding the space requirements for movement of traditional transformable furniture.

[0095] In a specific embodiment, such as Figure 16 and Figure 17As shown, the backrest 3 includes a fixing unit 31, a first movable plate 32, a second movable plate 33, and a connecting rod unit 34. One end of the fixing unit 31 is fixed to the support frame structure 1, and the other end of the fixing unit 31 is connected to one end of the first movable plate 32. The connecting rod unit 34 is disposed on the side of the first movable plate 32, with one end connected to the fixing unit 31 and the other end connected to the second movable plate 33. The connecting rod unit 34 is located in the middle of these two ends and connected to the first movable plate 32. The connecting rod unit 34 can drive the first movable plate 32 and the second movable plate 33 to fold.

[0096] Specifically, the bottom of the fixed unit 31 is rigidly fixed to the rear frame of the support frame structure 1, serving as the static base of the backrest 3; the top of the fixed unit 31 is connected to one end of the first movable plate 32 via a hinge shaft, allowing the first movable plate 32 to fold back and forth relative to the fixed unit 31; the other end of the first movable plate 32 is also connected to the second movable plate 33 via a hinge shaft, allowing the second movable plate 33 to be angled relative to the first movable plate 32. These three components form a series hinge structure: the fixed unit 31 is anchored to the support frame at its fixed end, the first movable plate 32 is the intermediate force transmission component, and the second movable plate 33 is the terminal support plate, together constituting the telescopic frame of the backrest 3. Figure 17 and Figure 18 As shown, the linkage unit 34 is symmetrically arranged on both sides of the first movable plate 32. One end of the linkage unit 34 is connected to the side wall of the fixed unit 31 through the first hinge shaft 35, and the other end is connected to the side wall of the second movable plate 33 through the second hinge shaft 36. At the same time, the middle section of the linkage unit 34 is connected to the side of the first movable plate 32 through the connecting plate 37, forming a cross-type transmission chain of the fixed unit 31, the linkage unit 34, and the second movable plate 33, while the first movable plate 32 serves as an intermediate carrier and is driven through the linkage unit 34.

[0097] More specifically, the linkage unit 34 consists of two four-bar linkages, which are respectively located on both sides of the first movable plate 32.

[0098] The sofa provided in this embodiment has at least the following three postures:

[0099] Standard sitting posture: In this state, the support frame 2 is rotated and locked at the 0° horizontal position, the seat cushion maintains a moderate sitting depth, and the backrest 3 drives the first movable plate 32 and the second movable plate 33 to fold forward to the minimum sitting depth position through the linkage unit 34. At this time, the second movable plate 33 is tightly attached to the fixing unit 31 to form an upright support. After the user sits down, the sitting posture limiting block 151 at the bottom of the support frame 2 is pressed down by the body weight and penetrates into the groove of the corresponding adapter seat 152 of the support frame structure 1, triggering mechanical self-locking to prevent rotation. The backrest 3 is locked by the dead point of the four-bar linkage mechanism to ensure that it is convenient to get up when multiple people are sitting and talking and that the back support is stable.

[0100] Deep sitting relaxation state: In this state, the support frame 2 is maintained at a 0° sitting position, but the second movable plate 33 of the backrest 3 moves horizontally backward through the linkage unit 34, which increases the sitting depth. The first movable plate 32 rotates backward simultaneously to increase the tilt angle of the backrest 3. The sitting posture limit self-locking of the support frame 2 is activated, and the backrest 3 is fixed at the angle by the double four-bar linkage mechanism, providing users with sufficient leg support and a sense of envelopment, suitable for single-person curled-up reading or movie watching scenarios, while avoiding the difficulty of getting up caused by deep sitting.

[0101] Lying position: In this state, the support frame 2 rotates 90° to form a reclining angle greater than 90° with the backrest 3. At this time, the second movable plate 33 of the backrest 3 is pushed to the rear end through the linkage unit 34, and the first movable plate 32 rotates to the maximum angle. The reclining posture limiting block 151 of the support frame 2 is engaged with the adapter seat 152 of the support frame structure 1. The human body weight presses down to trigger the self-locking anti-rotation mechanism. The backrest 3 is locked by the four-linkage mechanism to form a stable and shaky temporary berth, which meets the needs of napping or lying flat to watch movies, and the sofa body does not need to be moved at all.

[0102] In actual use, when switching from a sitting position to a deep sitting position, the user directly pulls the second movable plate 33 of the backrest 3 backward, and the linkage unit 34, in conjunction with the first movable plate 32, rotates backward to increase the sitting depth; when switching to a reclining position, the user first gently pushes the support frame 2 to rotate 90°, and then pulls the backrest 3 backward to the limit position; when resetting, the operation is reversed: first push the backrest 3 to reduce the sitting depth, and then lift the support frame 2 to rotate back to zero.

[0103] Of course, it is understandable that, in addition to the backrest described in Embodiment 2, this utility model can be adapted to various backrests in related technologies.

[0104] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0105] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A support frame assembly, characterized in that, The device includes a support frame structure and a support frame, with the support frame mounted on the support frame structure. The support frame structure enables rotation of the support frame. The support frame structure includes a support frame body, a track assembly, a sliding assembly, and a rotating assembly. The track assembly is fixed to the support frame body, and the sliding assembly is slidably connected to the track assembly. The length of the support frame is greater than its width, and it is fixedly connected to the rotating assembly. The rotating assembly is rotatably connected to the sliding assembly and is configured to rotate relative to the sliding assembly under external force. The support frame is configured to be in a seated posture state when it moves to a first position with the rotating assembly. The support frame is configured to be in a reclining position when it moves to the second position with the rotating component.

2. The support frame assembly according to claim 1, characterized in that, The support frame assembly includes two track assemblies, namely a first track and a second track, which are arranged at an angle to each other; the first track has a sliding component slidably connected thereto, and a rotating component rotatably connected to the sliding component; The second track has a sliding assembly slidably connected thereto, and a rotating assembly rotatably connected to the sliding assembly; The sliding assembly includes a slider and a fixed seat that are fixedly connected. The slider is slidably connected to the track assembly. At least a portion of the fixed seat is inserted into the rotating assembly to form a connection between the sliding assembly and the rotating assembly.

3. The support frame assembly according to claim 2, characterized in that, The rotating assembly includes a connecting block that can rotate relative to the fixed base. The connecting block is fixedly connected to the support frame, and the support frame is provided with functional holes. The connecting block has a first part, and the fixing seat has a second part; both the first part and the second part are inserted into the functional hole, and the first part surrounds the outside of the second part; The rotating assembly further includes a friction pair unit, at least a portion of which is disposed between the first portion and the second portion.

4. The support frame assembly according to claim 3, characterized in that, The friction pair unit includes a bushing and a friction element arranged sequentially from bottom to top. The bushing is located between the fixed seat and the connecting block. A portion of the friction element is sleeved between the fixed seat and the connecting block, and the upper part of the friction element is located on the upper side of the connecting block, while the lower part is located between the first part and the second part.

5. The support frame assembly according to claim 4, characterized in that, The outer sidewall of the friction element, the inner sidewall of the functional hole, and the outer sidewall of the bushing form a receiving space. The receiving space has or can generate a gap for the connecting block to move up and down, so that the support frame fixedly connected to the connecting block has the mobility to change its own height. The support frame assembly further includes a limiting component, which includes a limiting block and an adapter seat. The limiting block is disposed on the support frame and has a spherical head. The adapter seat is disposed on the support frame body and has a groove into which the spherical head can be engaged. The spherical head is configured to be able to change position between a first height, a second height, and a third height. The first height of the spherical head is lower than the second height; when the spherical head is at the second height, the spherical head can pass over the highest point of the groove; when the spherical head is at the third height, the spherical head sinks relative to when it is at the second height.

6. The support frame assembly according to claim 4, characterized in that, The support frame assembly further includes a limiting component, which includes a limiting block and an adapter seat. The limiting block is disposed on the support frame and has a spherical head. The adapter seat is disposed on the support frame body and has a groove into which the spherical head can be engaged. The spherical head is configured to be able to change position between a first height, a second height, and a third height. The first height of the spherical head is lower than the second height; when the spherical head is at the second height, the spherical head can pass over the highest point of the groove; when the spherical head is at the third height, the spherical head sinks relative to when it is at the second height. The limiting block is connected to the support frame via a floating fastener, or the adapter is connected to the support frame body via a floating fastener; the floating fastener allows the limiting block or the adapter to move in the vertical direction.

7. The support frame assembly according to claim 6, characterized in that, The support frame body is provided with a guide groove, and a sliding component is connected to the support frame; the sliding component is configured to slide along the guide groove when the support frame rotates; the guide groove is configured to limit the rotational stroke range of the support frame.

8. The support frame assembly according to claim 5, characterized in that, The inner diameter of the functional hole in the support frame is larger than the outer diameter of the first part; there is a distance between the inner wall of the functional hole and the outer wall of the first part; the accommodating space is provided with a gap for the connecting block to move.

9. The support frame assembly according to claim 5, characterized in that, The support frame has a first rotation angle adapted to a sitting posture and a second rotation angle adapted to a lying posture; when the support frame is in the first position, it is located at the first rotation angle; when the support frame is in the second position, it is located at the second rotation angle. The support frame assembly includes two limiting blocks. The first limiting block is positioned such that when the support frame is at a first rotation angle, the spherical head of the first limiting block engages in the groove. The second limiting block is positioned such that when the support frame is at a second rotation angle, the spherical head of the second limiting block engages in the groove.

10. A sofa, characterized in that, The sofa includes a support frame assembly as described in any one of claims 1-9 and a backrest, wherein the support frame is located on the support frame structure, and a clearance is provided between the backrest and the support frame to allow the support frame to rotate.

11. The sofa according to claim 10, characterized in that, The backrest includes a fixing unit, a first movable plate, a second movable plate, and a linkage unit. One end of the fixing unit is fixed to the support frame structure, and the other end of the fixing unit is connected to one end of the first movable plate. The linkage unit is disposed on the side of the first movable plate, with one end connected to the fixing unit and the other end connected to the second movable plate. The middle part of the linkage unit at these two ends is connected to the first movable plate. The linkage unit can drive the first movable plate and the second movable plate to fold.

Images