A sofa rocking mechanism and sofa

Abstract

This utility model discloses a sofa rocking mechanism and a sofa. The sofa rocking mechanism includes a first rocking member and a second rocking member, which are rotatably connected by a rotating pin; and a first elastic element and a second elastic element, both disposed between the first and second rocking members, and respectively located on one side and the other side of the rotating pin. This utility model effectively avoids relative sliding friction between the end of the elastic element and the rocking member, thereby reducing operating noise and improving the comfort and quietness of the user experience. At the same time, the single rotating pin structure eliminates the mechanical dead point problem, enabling the mechanism to achieve a larger swing angle and ensuring smooth and stable operation, solving the technical problems of high noise in existing combined spring structures and limited swing angle in multi-link structures.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a sofa rocking mechanism and a sofa. Background Technology

[0002] In daily life, rocking sofas are becoming increasingly popular. These products are typically designed to swing back and forth when the user applies a slight external force, thus providing a relaxing and leisurely experience. Most existing rocking sofas use a combination spring structure or a multi-link structure to achieve the swinging function. However, the combination spring structure is prone to generating significant friction noise during the swinging process, affecting user comfort; the multi-link structure is prone to mechanical dead spots, making it difficult to achieve a large swing angle, resulting in a poor overall experience.

[0003] Therefore, a low-noise, stable rocking mechanism with a large swing angle is needed to improve the comfort and practicality of rocking sofa products. Utility Model Content

[0004] The main purpose of this utility model is to provide a sofa rocking mechanism and a sofa to solve the above-mentioned technical problems.

[0005] The objective of this utility model can be achieved by adopting the following technical solution: A sofa rocking mechanism includes: a first rocking member and a second rocking member, the first rocking member and the second rocking member being rotatably connected by a rotating pin; and a first elastic element and a second elastic element, the first elastic element and the second elastic element being disposed between the first rocking member and the second rocking member, and respectively located on one side and the other side opposite to the rotating pin; wherein, the two ends of the first elastic element and the second elastic element are respectively fixedly connected to the first rocking member and the second rocking member to provide a restoring force when the first rocking member swings relative to the second rocking member around the rotating pin.

[0006] It also includes a limiting structure, which is disposed between the second swing member and the first swing member, and is used to limit the swing angle when the first swing member swings.

[0007] The limiting structure includes at least two limiting members disposed on the second swing member and at least two mating parts disposed on the first swing member; the limiting members are respectively corresponding to the mating parts, and are used to limit the swing angle by the abutment between the limiting members and the mating parts when the first swing member swings.

[0008] The limiting member is a limiting rivet, which protrudes from the side wall of the second swing member; the mating part is a limiting groove, which is located at the corner of the first swing member near the second swing member; and when the first swing member swings to a preset angle, the limiting rivet abuts against the groove wall of the limiting groove.

[0009] The first elastic element and the second elastic element are both springs, and the two ends of each spring are respectively fixedly connected to the first swing member and the second swing member by a fixing plate.

[0010] The fixing plate includes a mounting part for connecting with the first swing member or the second swing member, and a supporting part integrally formed with the mounting part for supporting the end of the spring; an accommodating space is formed between the supporting part and the mounting part, and the end of the spring is embedded in the corresponding accommodating space.

[0011] The support portion has a boss on its surface, which is located inside the corresponding end of the spring. The outer contour of the boss matches the inner contour of the corresponding end of the spring, and is used to radially limit the spring.

[0012] The spring is a variable pitch spring, wherein the pitch at both ends of the variable pitch spring is greater than the pitch in the middle.

[0013] The first swing member and the second swing member are nested together to form an internal cavity; the rotating pin is transversely inserted through the middle of the internal cavity; and the first elastic element and the second elastic element are vertically fixed at both ends of the internal cavity.

[0014] The first swing member includes a top plate and a pair of first side plates extending integrally downward from both sides of the top plate; the top ends of the first elastic element and the second elastic element are respectively fixedly connected to the top plate, and each of the first side plates is provided with a pivot hole that cooperates with the rotating pin.

[0015] The second swing member includes a base plate and a pair of second side plates extending integrally upward from both sides of the base plate; the bottom ends of the first elastic element and the second elastic element are respectively fixedly connected to the base plate, and each second side plate is provided with a through hole coaxial with the pivot hole.

[0016] A sofa includes a sofa frame and a sofa base disposed below the sofa frame, and a sofa rocking mechanism as described above disposed between the sofa frame and the sofa base; wherein a first rocking member of the sofa rocking mechanism is fixedly connected to the sofa frame, and a second rocking member is fixedly connected to the sofa base.

[0017] The beneficial technical effects of this utility model are as follows: The sofa rocking mechanism provided by this utility model connects the first rocking member and the second rocking member through a single rotating pin, and sets a first elastic element and a second elastic element fixedly connected on both sides of the rotating pin, realizing the function of providing restoring force when the first rocking member swings relative to the second rocking member. This design effectively avoids relative sliding friction between the end of the elastic element and the rocking member, thereby reducing operating noise and improving the comfort and quietness of the user experience; at the same time, the structure of the single rotating pin eliminates the mechanical dead point problem, enabling the mechanism to achieve a larger swing angle and ensuring smooth and stable operation, solving the technical problems of high noise in existing combined spring structures and limited swing angle in multi-link structures. Attached Figure Description

[0018] 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.

[0019] Figure 1 A three-dimensional schematic diagram of the sofa rocking mechanism provided in an embodiment of this utility model; Figure 2 A cross-sectional schematic diagram of the sofa rocking mechanism provided in an embodiment of this utility model; Figure 3 A schematic diagram of the structure of the second swinging component and its surface in the sofa rocking mechanism provided in this embodiment of the utility model; Figure 4 A schematic diagram of the sofa rocking mechanism in the forward rocking state provided in this embodiment of the utility model; Figure 5 A schematic diagram of the sofa rocking mechanism during forward rocking, provided as an embodiment of this utility model; Figure 6 A schematic diagram of the sofa rocking mechanism in the following embodiment of the present utility model during the rocking motion. Figure 7 A schematic diagram of the sofa rocking mechanism during backward rocking, provided in an embodiment of this utility model; Figure 8 A schematic diagram of the spring in the sofa rocking mechanism provided in this embodiment of the utility model; Figure 9 A three-dimensional schematic diagram of the fixing plate in the sofa rocking mechanism provided in this embodiment of the utility model; Figure 10 A schematic diagram showing the connection between the sofa base and the sofa rocking mechanism in an embodiment of this utility model; Figure 11A three-dimensional schematic diagram of a sofa provided for an embodiment of this utility model.

[0020] Explanation of reference numerals in the attached figures: In the figure: 1-First swinging component, 2-Second swinging component, 3-Rotating pin, 4-First elastic element, 5-Second elastic element, 7-Limiting component, 8-Matching part, 9-Fixing plate, 11-Top plate, 12-First side plate, 13-Pivot hole, 21-Bottom plate, 22-Second side plate, 23-Through hole, 30-Sofa seat frame, 40-Sofa base, 91-Mounting part, 92-Supporting part, 93-Accommodation space, 94-Boss. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0023] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0024] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0025] like Figures 1-9As shown in the figure, this utility model provides a sofa rocking mechanism, which aims to provide a low-noise, stable rocking experience with a large swing angle. The sofa rocking mechanism includes a first rocking member 1 and a second rocking member 2, which are rotatably connected by a rotating pin 3; and a first elastic element 4 and a second elastic element 5, both disposed between the first rocking member 1 and the second rocking member 2, and respectively located on one side and the other side of the rotating pin 3; wherein the two ends of the first elastic element 4 and the second elastic element 5 are fixedly connected to the first rocking member 1 and the second rocking member 2, respectively, to provide a restoring force when the first rocking member 1 swings relative to the second rocking member 2 around the rotating pin 3.

[0026] In this embodiment, the sofa rocking mechanism includes a first rocker 1 and a second rocker 2. The first rocker 1 can be understood as an upper rocker plate connected to the sofa seat frame, while the second rocker 2 can be understood as a lower rocker plate connected to the sofa base. The first rocker 1 and the second rocker 2 are rotatably connected by a rotating pin 3. The rotating pin 3 is arranged laterally, and its axis forms the central axis of the swing of the first rocker 1 relative to the second rocker 2, thereby allowing the sofa seat frame equipped with this mechanism to perform back-and-forth rocking motion.

[0027] To provide restoring force and achieve a smooth swinging effect during the swinging process, the mechanism also includes a first elastic element 4 and a second elastic element 5. Both the first elastic element 4 and the second elastic element 5 are disposed within the space formed between the first swing member 1 and the second swing member 2.

[0028] Crucially, the first elastic element 4 and the second elastic element 5 are located on opposite sides of the rotating pin 3, respectively. For example, if the length direction of the sofa rocking mechanism is defined as the front-to-back direction, and the rotating pin 3 is located in the middle, then the first elastic element 4 can be placed on the front side of the rotating pin 3, while the second elastic element 5 can be placed on the rear side of the rotating pin 3. This symmetrical or quasi-symmetrical layout makes the force on the mechanism more balanced during rocking and the operation more stable.

[0029] To ensure that the elastic elements can effectively transmit force, the two ends of the first elastic element 4 and the second elastic element 5 are fixedly connected to the first swing member 1 and the second swing member 2, respectively. Specifically, the upper end of the first elastic element 4 is fixed to the lower surface of the first swing member 1, and the lower end is fixed to the upper surface of the second swing member 2; similarly, the upper end of the second elastic element 5 is fixed to the lower surface of the first swing member 1, and the lower end is fixed to the upper surface of the second swing member 2. This fixed connection design also brings additional benefits: it effectively prevents uncontrollable relative displacement or sliding between the ends of the elastic elements and the swing members, thereby avoiding frictional noise and making the entire swinging process quieter and smoother.

[0030] When the user applies an external force to make the first swinging element 1 (and the sofa frame) swing forward relative to the second swinging element 2 (and the sofa base) around the rotating pin 3, the first elastic element 4 located at the front is compressed, while the second elastic element 5 located at the rear is stretched. Conversely, when swinging backward, the first elastic element 4 is stretched, while the second elastic element 5 is compressed. Whether compressed or stretched, the first elastic element 4 and the second elastic element 5 undergo elastic deformation and store energy, thereby providing a restoring force. This allows the first swinging element 1 to tend to return to its initial equilibrium position and maintain continuous swinging for a period of time after the external force is removed, improving user comfort.

[0031] The sofa rocking mechanism provided in this embodiment is designed with two rocking components connected by a rotating pin 3 and elastic elements fixedly connected on both sides of the rotating pin 3. The rotating pin 3 serves as a single rocking axis, allowing for a larger swing amplitude without being limited by mechanical dead points. At the same time, the fixed connection of the elastic elements avoids friction noise caused by relative displacement, achieving low noise and stable operation, thereby improving the comfort and practicality of rocking sofa products.

[0032] In one embodiment, a limiting structure is also included, which is disposed between the second swing member 2 and the first swing member 1, for limiting the swing angle when the first swing member 1 swings.

[0033] like Figure 1 , Figure 5 and Figure 7 As shown, in this embodiment, when the user swings the sofa, the first swing member 1 will rotate at a certain angle relative to the second swing member 2. In order to prevent the mechanism from becoming unstable due to excessive swing amplitude, causing excessive deformation damage to the elastic element, or causing insecurity to the user, this embodiment adds the limiting structure.

[0034] When the first swing member 1 swings forward or backward to the preset maximum swing angle, the corresponding part of the limiting structure located between the first swing member 1 and the second swing member 2 will make physical contact or abut, thereby generating an effective mechanical blockage. This blocking force will prevent the first swing member 1 from continuing to swing in that direction, thus limiting its maximum swing angle to a safe, preset range.

[0035] By adding this limiting structure, the sofa's rocking mechanism not only provides a comfortable rocking experience, but also ensures the safety and durability of the rocking process, effectively solving the problem of uncontrollable rocking angle in existing technologies and improving the overall reliability of the product.

[0036] In one specific embodiment, the limiting structures are distributed on one side corresponding to the first elastic element 4 and the other side corresponding to the second elastic element 5. This arrangement allows the limiting structures to effectively control the forward and backward swinging directions of the first swinging member 1. Specifically, when the first swinging member 1 swings forward, the limiting structure prevents the swing angle from exceeding the preset maximum forward swing angle through mechanical interference or blocking action; similarly, when the first swinging member 1 swings backward, the limiting structure limits it from exceeding the preset maximum backward swing angle. This preset angle can be designed according to the usage requirements and safety requirements of the sofa to avoid user discomfort or mechanical damage caused by excessive swinging.

[0037] In one embodiment, the limiting structure includes at least two limiting members 7 disposed on the second swing member 2 and at least two mating parts 8 disposed on the first swing member 1; the limiting members 7 correspond to the mating parts 8 respectively, and are used to limit the swing angle by the contact between the limiting members 7 and the mating parts 8 when the first swing member 1 swings.

[0038] like Figure 5 and Figure 7 As shown, in this embodiment, in order to separately limit the swing angles in the forward and backward directions, there are two limiting members 7: one for limiting the maximum angle of the forward swing and the other for limiting the maximum angle of the backward swing. Correspondingly, there are also two mating parts 8, which correspond one-to-one with the two limiting members 7.

[0039] The two limiting members 7 are symmetrically or asymmetrically distributed on the second swing member 2 and located on both sides of the rotating pin 3. For example, one limiting member 7 is located at the front of the second swing member 2 and the other limiting member 7 is located at the rear of the second swing member 2. Similarly, two mating parts 8 are also correspondingly located at the front and rear of the first swing member 1.

[0040] When the first swing member 1 swings forward, its front mating part 8 gradually approaches the limiting part 7 at the front of the second swing member 2. When the swing reaches the preset maximum forward swing angle, the mating part 8 abuts against the corresponding limiting part 7. This abutting relationship forms a rigid mechanical limit, thereby preventing the first swing member 1 from continuing to swing forward. Similarly, when the first swing member 1 swings backward to the preset maximum backward swing angle, its rear mating part 8 abuts against the limiting part 7 at the rear of the second swing member 2, thereby limiting the backward swing angle.

[0041] Through this limiting structure consisting of the limiting member 7 and the mating part 8, this embodiment can accurately control the maximum swing range of the sofa in a simple and reliable manner, ensuring safety and stability during use.

[0042] In one embodiment, the limiting member 7 is a limiting rivet, which protrudes from the side wall of the second swing member 2; the mating part 8 is a limiting groove, which is located at the corner of the first swing member 1 near the second swing member 2; wherein, when the first swing member 1 swings to a preset angle, the limiting rivet abuts against the groove wall of the limiting groove.

[0043] like Figure 5 and Figure 7 As shown, in this embodiment, two limiting rivets are installed on one side wall of the second swing member 2. These limiting rivets protrude outward from the side wall of the second swing member 2 to a certain extent, forming a raised limiting point. This protruding design allows the limiting rivets to provide sufficient contact surface without occupying too much space.

[0044] Accordingly, the mating part 8 is a limiting groove, which is disposed at the corner of the first swing member 1 near the second swing member 2. Specifically, the first swing member 1 has limiting grooves at positions corresponding to the limiting rivets (such as the front corner and the rear corner). The shape and size of these limiting grooves are designed to accommodate or partially accommodate the protruding part of the limiting rivet, thereby achieving mating during swinging.

[0045] In practical use, when the first swinging member 1 swings to a preset angle, the limiting rivet enters the corresponding limiting groove and abuts against the groove wall. This abutment forms a rigid mechanical barrier, preventing the first swinging member 1 from continuing to swing, thus effectively limiting the swing angle. For example, when swinging forward (forward), the front limiting rivet abuts against the groove wall of the front limiting groove; when swinging backward (backward), the rear limiting rivet abuts against the groove wall of the rear limiting groove. This design ensures the reliability of the limiting action, and the simple structure of the rivet and groove makes it easy to manufacture and assemble, reducing production costs.

[0046] By using a combination of limiting rivets and limiting grooves, the sofa rocking mechanism can effectively avoid the risks caused by excessive swaying while achieving large-angle rocking.

[0047] In one embodiment, the first elastic element 4 and the second elastic element 5 are both springs, and the two ends of each spring are respectively fixedly connected to the first swing member 1 and the second swing member 2 by a fixing plate 9.

[0048] like Figure 2 and Figure 8 As shown, in this embodiment, both the first elastic element 4 and the second elastic element 5 are springs, specifically helical compression springs, with gaps between adjacent coils.

[0049] To ensure that the springs are securely connected between the first swing member 1 and the second swing member 2 and effectively transmit force, each of the springs is fixedly connected to the first swing member 1 and the second swing member 2 at both ends by a fixing plate 9.

[0050] Specifically, taking the first elastic element 4 (spring) as an example, its upper end is fixedly connected to the lower surface of the first swinging member 1 through a fixing plate 9, and its lower end is fixedly connected to the upper surface of the second swinging member 2 through another fixing plate 9. The second elastic element 5 (spring) also adopts the same connection method. These fixing plates 9 are fixedly connected to the corresponding swinging members by welding, bolting, or other methods, providing a mounting base for the spring and ensuring axial stability of the spring during operation, preventing it from tilting or falling off.

[0051] By employing a spring as the elastic element and installing it via a fixing plate 9, this embodiment not only achieves a reliable restoring force provision mechanism, but also features a simple and clear structural design that is easy to assemble and maintain.

[0052] In one embodiment, the fixing plate 9 includes a mounting portion 91 for connecting with the first swing member 1 or the second swing member 2, and a supporting portion 92 integrally formed with the mounting portion 91 for supporting the end of the spring; a receiving space 93 is formed between the supporting portion 92 and the mounting portion 91, and the end of the spring is embedded in the corresponding receiving space 93.

[0053] like Figure 4 and Figure 9 As shown, in this embodiment, the fixing plate 9 includes an integrally formed mounting part 91 and a supporting part 92.

[0054] The mounting part 91 is a flat wing-shaped structure located at both ends of the fixed plate 9, with mounting holes provided thereon so that the entire fixed plate 9 can be firmly mounted on the corresponding surface of the first swing member 1 or the second swing member 2 by means of fasteners such as bolts or rivets.

[0055] The support portion 92 is located in the middle of the fixed plate 9, connecting the mounting portions 91 on both sides. Its main function is to provide a base for supporting and positioning the end of the spring. Crucially, the two sides of the support portion 92 connect with the corresponding mounting portions 91, and its central area protrudes upward (taking the fixed plate 9 located on the upper surface of the second swing member 2 as an example), thus forming an accommodating space 93 between it and the flat mounting portions 91. The shape and size of this accommodating space 93 are designed to match the outer contour of the spring end.

[0056] During assembly, the end of the spring (e.g., the last coil of the spring) can be precisely inserted laterally into the corresponding receiving space 93. This "embedded" installation method ensures that the end of the spring is surrounded by the side walls, top wall, and bottom wall of the receiving space 93 and is in a compressed state, thereby achieving effective limitation in both the radial and axial directions. Here, the side walls of the receiving space 93 refer to the connection between the support portion 92 and its two side mounting portions 91. The top wall of the receiving space 93 is formed by the central region of the support portion 92, and the bottom wall is formed by the upper surface of the second swing member 2 (here, the fixing plate 9 located on the upper surface of the second swing member 2 is still taken as an example).

[0057] This design ensures that even during vigorous sofa swaying and repeated compression and stretching of the springs, their ends remain firmly fixed in the preset position, effectively preventing lateral slippage or deflection. This not only guarantees that the springs can consistently transmit force stably along their axial direction, but also simplifies the number of parts by integrating the support part 92 with the mounting part 91, thus improving the structural strength and reliability of the fixing plate 9 itself. Furthermore, the embedded installation method simplifies the assembly process and improves production efficiency.

[0058] In one embodiment, the surface of the support portion 92 is provided with a boss 94, the boss 94 is located inside the corresponding end of the spring, and the outer contour of the boss 94 is adapted to the inner contour of the corresponding end of the spring, for radial limiting of the spring.

[0059] In this embodiment, a boss 94 is provided on the surface of the support portion 92. The boss 94 can be a ring structure, protruding downward from the surface of the support portion 92 (i.e., the top wall of the accommodating space 93). Here, the fixing plate 9 located on the upper surface of the second swing member 2 is taken as an example. If it is the fixing plate 9 on the lower surface of the first swing member 1, then its boss 94 protrudes upward from the surface of the support portion 92.

[0060] When the end of the spring is laterally inserted into the receiving space 93, the boss 94 will be inserted into the hollow area inside the coil at the end of the spring.

[0061] To achieve optimal limiting effect, the outer contour of the boss 94 is adapted to the inner contour of the corresponding end of the spring. This means that the outer diameter of the boss 94 is slightly smaller than the inner diameter of the spring end coil, forming a tight fit or a small gap between them.

[0062] By adding this boss 94, this embodiment achieves dual radial limiting of the spring: on the one hand, the outer wall of the accommodating space 93 restricts the back-and-forth movement of the spring end; on the other hand, the newly added boss 94 constrains the spring end from the inside, preventing it from sliding in the horizontal direction.

[0063] This dual-limiting structure ensures that the spring's end is firmly fixed in the center position when subjected to lateral force in any direction, preventing radial displacement. This not only improves the operational stability of the rocking mechanism, but more importantly, it effectively prevents the spring from colliding and rubbing against the fixed plate 9 or the rocking component due to its back-and-forth and left-and-right swaying, thus eliminating potential noise at its source. This design significantly improves the product's quietness and user experience.

[0064] In one embodiment, the spring is a variable pitch spring, wherein the pitch at both ends of the variable pitch spring is greater than the pitch at the middle.

[0065] like Figure 8 As shown in this embodiment, the coil arrangement of the variable pitch spring (not separately marked in the figure) is not uniform, but presents a distribution pattern of "sparse at both ends and dense in the middle": the coil spacing (pitch) near the two ends is larger, while the coil spacing in the middle is relatively smaller. This non-uniform design makes the spring less likely to collide with the fixed plate 9 and generate noise while maintaining overall stiffness stability. In addition, it also facilitates assembly with the fixed plate 9.

[0066] During assembly, when the end of the spring is fixedly connected to the first swing member 1 or the second swing member 2 through the fixing plate 9 and the accommodating space 93 formed therein, the end coil with a larger pitch can more easily fit into the support part 92 and the adjacent accommodating space 93, avoiding greater jamming during installation and improving assembly efficiency.

[0067] Taking the first elastic element 4 (spring) as an example, its middle section uses a smaller pitch, meaning the coils in the middle are more closely spaced. When the spring is compressed, the coils in the middle section will contact the coils at both ends first, resulting in more concentrated deformation and providing the main elastic restoring force. This design effectively prevents the second section of the spring coil (near the end) from colliding with the surface of the support 92 when the swing amplitude is large, thus avoiding the impact noise generated as a result.

[0068] In summary, by using a variable pitch spring with a large pitch at both ends and a small pitch in the middle, this embodiment not only optimizes the installation process but also solves the noise source that may occur during the rocking process through pre-design of the structure, further improving the quiet performance of the sofa rocking mechanism.

[0069] In one specific embodiment, a larger pitch is used in both ends of the spring (this area includes not only the first coil section ultimately housed by the fixing plate 9, but also its adjacent second and even third coil sections), making the gap between these coils significantly larger than the gap between the coils in the middle area of ​​the spring. During installation, this design helps the support portion 92 of the fixing plate 9 to easily pass through the larger gap between the end coils from the side of the spring, accurately align and snap into the first coil section, thereby securely embedding the first coil of the spring into the receiving space 93.

[0070] In one embodiment, the first swing member 1 and the second swing member 2 are nested together to form an internal cavity; the rotating pin 3 is transversely inserted through the middle of the internal cavity, and the first elastic element 4 and the second elastic element 5 are respectively vertically fixed at both ends of the internal cavity.

[0071] In this embodiment, the first swing member 1 and the second swing member 2 are nested together to form an internal cavity with openings at both ends. Specifically, the first swing member 1 can be designed as a U-shaped or groove-shaped structure with an opening facing downwards, and the second swing member 2 can be designed as a U-shaped or groove-shaped structure with an opening facing upwards. In the assembled state, the U-shaped opening of the first swing member 1 covers the U-shaped opening of the second swing member 2 with its sidewalls parallel to each other and partially overlapping, thereby enclosing and forming an internal cavity.

[0072] This encasing structure encloses all the elastic elements within the cavity, providing excellent protection.

[0073] In this structural layout, the rotating pin 3 is transversely inserted through the middle region of the internal cavity, serving as the central pivot of the first swing member 1 relative to the second swing member 2.

[0074] Meanwhile, the first elastic element 4 and the second elastic element 5 are respectively vertically fixed at both ends of the internal cavity. Specifically, the first elastic element 4 is vertically installed at one end of the internal cavity (e.g., the front), and its upper and lower ends are respectively connected to the first swing member 1 and the second swing member 2; the second elastic element 5 is vertically installed at the other end of the internal cavity (e.g., the rear) in the same manner.

[0075] With this layout, the rotating pin 3 is located between the two elastic elements, forming a structure of "pivoting at the midpoint and elastic support at both ends". When the first swinging member 1 swings around the rotating pin 3 in the middle, the elastic elements at both ends can work together, one under pressure and the other under tension, thereby providing a smooth and stable swing dynamic response. By housing all the core components within a cavity enclosed by the swinging member itself, the sofa swinging mechanism of this embodiment is highly integrated in structure and has stable and reliable performance.

[0076] In one embodiment, the first swing member 1 includes a top plate 11 and a pair of first side plates 12 extending integrally downward from both sides of the top plate 11; the top ends of the first elastic element 4 and the second elastic element 5 are respectively fixedly connected to the top plate 11, and each of the first side plates 12 is provided with a pivot hole 13 that cooperates with the rotating pin 3.

[0077] In this embodiment, the first swing member 1, also known as the upper swing plate, has an overall structure of a downward-opening groove-shaped component. Specifically, the first swing member 1 includes a top plate 11 and a pair of first side plates 12 extending integrally downward from both sides of the top plate 11.

[0078] The top plate 11 is a horizontally arranged plate that forms the upper structure of the first swing member 1 and also forms the "top cover" of the internal cavity. The top plate 11 not only provides structural rigidity for the entire first swing member 1, but also serves as a mounting base for fixed connection with the sofa seat frame.

[0079] The pair of first side plates 12 are located on the left and right sides of the top plate 11, respectively, and are integrally formed with the top plate 11 (e.g., by bending or casting), extending downward perpendicularly to the top plate 11. This pair of first side plates 12 constitutes part of the sidewall of the internal cavity.

[0080] To achieve a rotatable connection with the second swing member 2, each of the first side plates 12 is provided with a pivot hole 13 that mates with the rotating pin 3. The axes of the two pivot holes 13 are coaxial and located in the central region of the first side plate 12. During assembly, the rotating pin 3 passes through the two pivot holes 13, thereby allowing the first swing member 1 to swing around the axis of the rotating pin 3.

[0081] Furthermore, in order to fix the elastic elements, the top ends of the first elastic element 4 and the second elastic element 5 are respectively fixedly connected to the inner surface (i.e., the lower surface) of the top plate 11. Specifically, the top end of the first elastic element 4 is fixed to the front part of the lower surface of the top plate 11, and the top end of the second elastic element 5 is fixed to the rear part of the lower surface of the top plate 11.

[0082] With this structure consisting of a top plate 11 and a pair of first side plates 12, the first swing member 1 is not only simple and sturdy, but also has a clear function: the top plate 11 is used to connect the sofa frame and fix the elastic element, and the side plates are used to realize the pivot connection, together forming a functionally integrated upper swing member.

[0083] In one embodiment, the second swing member 2 includes a base plate 21 and a pair of second side plates 22 integrally extending upward from both sides of the base plate 21; the bottom ends of the first elastic element 4 and the second elastic element 5 are respectively fixedly connected to the base plate 21, and each of the second side plates 22 is provided with a through hole 23 coaxial with the pivot hole 13.

[0084] In this embodiment, the second swing member 2, also known as the lower swing plate, has an overall structure of an upward-opening groove-shaped component, which complements the structure of the first swing member 1. Specifically, the second swing member 2 includes a base plate 21 and a pair of second side plates 22 integrally extending upward from both sides of the base plate 21.

[0085] The base plate 21 is a horizontally arranged plate that forms the lower structure of the second swing member 2 and also forms the "base" of the internal cavity. The base plate 21 provides a stable support foundation for the entire swing mechanism and is used for fixed connection with the sofa base.

[0086] The pair of second side plates 22 are located on the left and right sides of the base plate 21, respectively, and are integrally formed with the base plate 21, extending upward perpendicularly to the base plate 21. In the assembled state, the pair of second side plates 22 are located inside the pair of first side plates 12 of the first swing member 1, together forming the sidewall of the internal cavity.

[0087] To achieve a rotatable connection with the first swing member 1, each of the second side plates 22 has a through hole 23 coaxial with the pivot hole 13 on the first side plate 12. The axes of these two through holes 23 are also coaxial. During assembly, the rotating pin 3 will pass sequentially through the pivot hole 13 on one side of the first side plate 12 and the through hole 23 on the second side plate 22, traverse the internal space, and then pass through the through hole 23 on the second side plate 22 and the pivot hole 13 on the first side plate 12 on the other side. In this way, the first swing member 1 and the second swing member 2 are reliably pivotally connected by the rotating pin 3.

[0088] Furthermore, to secure the elastic elements, the bottom ends of the first elastic element 4 and the second elastic element 5 are respectively fixedly connected to the upper surface of the base plate 21. Specifically, the bottom end of the first elastic element 4 is fixed to the front part of the upper surface of the base plate 21, and the bottom end of the second elastic element 5 is fixed to the rear part of the upper surface of the base plate 21.

[0089] Through this structure consisting of a base plate 21 and a pair of second side plates 22, the second swing member 2 and the first swing member 1 work together to form a stable and functionally defined swing assembly.

[0090] In one specific embodiment, the limiting rivet is disposed on the outer surface of the second side plate 22, for example, one on each side of the rotating pin 3. Correspondingly, the limiting groove is formed at the bottom corner of the first side plate 12. When the first swing member 1 swings forward or backward relative to the second swing member 2 to a preset maximum angle, the bottom corner of the first side plate 12 moves accordingly, causing the corresponding limiting groove to engage with the limiting rivet. At this time, the limiting rivet enters the limiting groove and abuts against the groove wall, forming an effective mechanical block, thereby limiting the swing angle within a safe range. This design, which integrates the limiting structure between the two side plates, is compact and provides reliable limiting.

[0091] like Figure 10 and Figure 11 As shown, corresponding to the above-described sofa rocking mechanism, this utility model embodiment also provides a sofa designed to provide users with a comfortable, safe, and quiet rocking experience. The sofa includes a sofa frame 30 and a sofa base 40 disposed below the sofa frame 30, and a sofa rocking mechanism as described in any of the preceding embodiments disposed between the sofa frame 30 and the sofa base 40; wherein, the first rocking member 1 of the sofa rocking mechanism is fixedly connected to the sofa frame 30, and the second rocking member 2 is fixedly connected to the sofa base 40.

[0092] In this embodiment, the sofa frame 30 is the main frame structure that forms the support for the sofa cushion and backrest. The sofa base 40 is the supporting part of the sofa that contacts the ground.

[0093] The sofa rocking mechanism is installed in the sofa as follows: the first rocking component 1 (i.e., the upper rocking plate) of the sofa rocking mechanism is fixedly connected to the sofa seat frame 30. For example, it can be fastened by bolts or other methods. At the same time, the second rocking component 2 (i.e., the lower rocking plate) of the sofa rocking mechanism is fixedly connected to the sofa base 40.

[0094] With this installation layout, the entire sofa rocking mechanism becomes the pivot connecting the sofa frame 30 and the sofa base 40. Since the second rocker 2 is fixedly connected to the sofa base 40, it remains stationary during sofa use. The first rocker 1, fixedly connected to the sofa frame 30, allows the sofa frame 30 to rock back and forth relative to the stationary second rocker 2 as the first rocker 1 moves.

[0095] When a user sits on the sofa and applies slight external force, the sofa seat frame 30 will smoothly swing back and forth around the rotating pin 3 under the action of the rocking mechanism. The elastic element (such as a spring) inside the rocking mechanism provides restoring force, making the rocking motion continuous and elastic; the limiting structure ensures that the rocking angle is within a safe range. Due to the various designs adopted in the aforementioned embodiments, the entire rocking process is stable and quiet, greatly improving the user's comfort.

[0096] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A sofa rocking mechanism, characterized in that, include: A first swing member and a second swing member are rotatably connected by a rotating pin; The first elastic element and the second elastic element are both disposed between the first swing member and the second swing member, and are respectively located on one side and the other side opposite to the rotating pin; wherein, the two ends of the first elastic element and the second elastic element are respectively fixedly connected to the first swing member and the second swing member to provide a restoring force when the first swing member swings relative to the second swing member around the rotating pin.

2. The sofa rocking mechanism according to claim 1, characterized in that, It also includes a limiting structure, which is disposed between the second swing member and the first swing member, and is used to limit the swing angle when the first swing member swings.

3. The sofa rocking mechanism according to claim 2, characterized in that, The limiting structure includes at least two limiting members disposed on the second swing member and at least two mating parts disposed on the first swing member; the limiting members correspond to the mating parts respectively, and are used to limit the swing angle by the contact between the limiting members and the mating parts when the first swing member swings.

4. The sofa rocking mechanism according to claim 3, characterized in that, The limiting component is a limiting rivet, which protrudes from the side wall of the second swing component; the mating part is a limiting groove, which is located at the corner of the first swing component near the second swing component; wherein, when the first swing component swings to a preset angle, the limiting rivet abuts against the groove wall of the limiting groove.

5. The sofa rocking mechanism according to claim 1, characterized in that, Both the first elastic element and the second elastic element are springs, and the two ends of each spring are respectively fixedly connected to the first swing member and the second swing member by a fixing plate.

6. The sofa rocking mechanism according to claim 5, characterized in that, The fixing plate includes a mounting portion for connecting with the first swing member or the second swing member, and a support portion integrally formed with the mounting portion for supporting the end of the spring; an accommodating space is formed between the support portion and the mounting portion, and the end of the spring is embedded in the corresponding accommodating space.

7. The sofa rocking mechanism according to claim 6, characterized in that, The surface of the support portion is provided with a boss, which is located inside the corresponding end of the spring, and the outer contour of the boss is adapted to the inner contour of the corresponding end of the spring, for radial limiting of the spring.

8. The sofa rocking mechanism according to claim 5, characterized in that, The spring is a variable pitch spring, where the pitch at both ends of the variable pitch spring is greater than the pitch in the middle.

9. The sofa rocking mechanism according to claim 1, characterized in that, The first swing member and the second swing member are nested together to form an internal cavity; the rotating pin is transversely inserted through the middle of the internal cavity, and the first elastic element and the second elastic element are respectively vertically fixed at both ends of the internal cavity.

10. The sofa rocking mechanism according to claim 9, characterized in that, The first swing member includes a top plate and a pair of first side plates extending integrally downward from both sides of the top plate; the top ends of the first elastic element and the second elastic element are respectively fixedly connected to the top plate, and each of the first side plates is provided with a pivot hole that cooperates with the rotating pin.

11. The sofa rocking mechanism according to claim 10, characterized in that, The second swing member includes a base plate and a pair of second side plates extending integrally upward from both sides of the base plate; the bottom ends of the first elastic element and the second elastic element are respectively fixedly connected to the base plate, and each second side plate is provided with a through hole coaxial with the pivot hole.

12. A sofa, characterized in that, The sofa includes a sofa frame and a sofa base disposed below the sofa frame, and a sofa rocking mechanism as described in any one of claims 1 to 11 disposed between the sofa frame and the sofa base; wherein a first rocking member of the sofa rocking mechanism is fixedly connected to the sofa frame, and a second rocking member is fixedly connected to the sofa base.

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