Sofa connecting assembly and mounting process thereof

Abstract

The invention relates to the technical field of sofa connecting assemblies, in particular to a sofa connecting assembly and a mounting technology thereof.The sofa connecting assembly comprises a sofa body, sofa armrests, a sofa base, a sofa fixing seat, a connecting locking assembly and a driving assembly, and the sofa armrests are symmetrically arranged and rotationally connected to the two sides of the sofa body; the bottom of the sofa main body is rotationally connected with a sofa base through a sofa fixing seat, and a connecting and locking assembly for butting and locking two adjacent sofa bases is arranged in the sofa base. Rapid alignment and locking are achieved through mechanical linkage, the problem that in the prior art, exposed screws are prone to being collided by external force to be loosened is solved, a closed self-locking structure is adopted in the scheme, the connection stability is improved, a traditional hidden connection mechanism needs a complex disassembly and assembly process, a movable part of a sofa serves as a driving source, and the structure is simple and convenient. When in use, the locking unit can be quickly driven to perform linkage, and rotary motion is converted into linear displacement by utilizing a mechanical linkage principle, so that hidden locking is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of sofa connection components, in particular to a sofa connection component and an installation process thereof. Background Art

[0002] A sofa is a type of seating and lying furniture made of soft materials and combined with a frame support system. Its core function is to provide comfortable support and wrapping for the human body. With the development of the times, sofas have gradually developed into various styles, such as single sofas, double sofas, and multi-person sofas. In modern home scenes, sofas often need to be flexibly adjusted in shape according to the size of the space and functional zoning.

[0003] At present, the current design of single sofas is mainly based on independent units. However, in order to meet usage needs, single sofas also have multiple functions. For example, two single sofas can be assembled into a double sofa. When assembling, the armrests on the adjacent sides of the two adjacent single sofas need to be folded down and assembled together. In order to prevent the sofas from separating during use, connecting components such as screws, bolts and other mechanical fasteners are also needed to connect and install the two sofas.

[0004] In the related art, although screw fixation can provide high connection strength, it is prone to loosening after long-term use and requires repeated tightening and maintenance. Moreover, during connection and installation, due to the small operating space at the bottom of the sofa, users need to operate in a small space when connecting. Ordinary users lack professional tools and installation experience, and the complicated assembly process can easily lead to incorrect operation and even damage the sofa frame. In addition, the exposed connection parts may affect the appearance, and the hidden design increases costs. Summary of the Invention

[0005] In order to solve the problem of operational complexity caused by traditional connection components when assembling two adjacent sofas, the present invention provides a sofa connection component and an installation process thereof.

[0006] The sofa connection assembly provided in this application adopts the following technical solution: Sofa connection components, including: A sofa body, wherein sofa armrests are symmetrically arranged on both sides of the sofa body and are rotatably connected thereto, and the bottom of the sofa body is rotatably connected to a sofa base via a sofa fixing seat; A connecting and locking assembly for docking and locking two adjacent sofa bases, and the connecting and locking assembly is disposed within the sofa base, comprising a docking plate, a sliding plate, a plug connector, a locking sleeve, and a locking unit. The two docking plates are symmetrically and slidably connected to both sides of the sofa base, the sliding plate is slidably connected to one end of the docking plate located outside the sofa base, the plug connector and the locking sleeve are respectively connected to one end of the two sliding plates located outside the docking plate, and the plug connector and the locking sleeve are coaxially disposed; A driving assembly for driving the docking plate to move in linkage is provided at the center of the sofa base, and the driving assembly comprises a linkage adjustment unit and a driving unit.

[0007] By adopting the above technical solution, this solution realizes alignment and locking through mechanical linkage, solving the problem in the prior art that exposed screws are easily loosened by external force collision. This solution adopts a closed self-locking structure to improve the connection stability. The traditional hidden connection mechanism requires a complicated disassembly and assembly process. This solution uses the sofa's own movable parts as a driving source, so that it can quickly drive the locking unit for linkage when in use, and uses the mechanical linkage principle to convert rotational motion into linear displacement to achieve hidden locking. The coaxial plug-in structure and self-locking unit are further designed to ensure that the docking process does not require excessive manual intervention. Compared with the existing screw connection, this component effectively improves the convenience of operation.

[0008] Optionally, the locking unit includes a locking rod and a locking slot, the locking slot is arranged on the side wall of the locking sleeve and is communicated with the internal cavity of the locking sleeve, a strip groove is opened on the side wall of the plug connector, one end of the locking rod is rotatably connected in the strip groove and docked with the locking slot.

[0009] By adopting the above technical solution, the present application realizes a non-visual locking operation, and the user can complete a stable connection with a simple push-in action, solving the problem that traditional installation requires professional tools and complex operations. The direct mechanical cooperation between the locking rod and the lock slot forms a rigid connection, avoiding the risk of loosening during long-term use. The completely hidden design of the locking rod in the locked state takes into account both structural reliability and appearance integrity.

[0010] Optionally, the locking unit also includes a linkage rod, an adjustment slot, an adjustment block and a first return spring. The linkage rod is slidably arranged in the internal cavity of the plug connector, the adjustment slot is arranged on the linkage rod, the adjustment block is fixed on the locking rod and the rotating connection end of the plug connector, and is slidably engaged in the adjustment slot. The first return spring is installed in the internal cavity of the plug connector, and one end abuts against the linkage rod.

[0011] By adopting the above technical solution, the present application realizes the automated operation of the docking and locking of the sofa base, eliminating the tedious steps of manually adjusting the lock rod. The rigid expansion action of the lock rod driven by the linkage rod can ensure full contact between the lock rod and the lock slot, avoiding loose connection due to insufficient locking force. The elastic force of the first return spring enables the lock rod to quickly reset when the locking state is released, providing convenience for repeated disassembly and assembly. The guiding matching structure of the adjustment slot and the adjustment block effectively prevents accidental displacement of the lock rod in the non-operating state, thereby improving the reliability of the connection assembly.

[0012] Optionally, the locking unit also includes a support rod, a support rod docking hole, a wedge-shaped notch and a second return spring. The support rod docking hole is set through the docking plate, and the wedge-shaped notch is concavely set on the sliding plate. One end of the support rod is rotatably connected to the sofa armrest, and the other end passes through the support rod docking hole and slides against the wedge-shaped notch. The second return spring is installed inside the docking plate, and one end abuts against the sliding plate.

[0013] By adopting the above technical solution, the present application realizes the automatic locking of the connecting locking assembly when the sofa armrest is folded down, and solves the problem of loose connection caused by the asynchronous locking state of adjacent sofa bases. The cooperation between the support rod and the inclined surface of the wedge-shaped groove ensures the precise control of the opening angle of the locking rod. The elastic support of the second return spring effectively prevents position deviation during the locking process, so that the adjacent sofa bases form a stable rigid connection after assembly.

[0014] Optionally, the linkage adjustment unit includes a support tube, a linkage gear, a rack, a first transmission rod, a driven rod and a clamping rod, the support tube is fixed at the bottom center of the sofa fixing seat, the linkage gear is coaxially connected to the bottom end of the support tube, the rack is fixed on the side of the docking plate close to the linkage gear and meshes with the linkage gear, the first transmission rod is rotatably connected to the inside of the sofa body, passes through the sofa fixing seat, and is partially located in the support tube, the driven rod is slidably connected to the axis center of the first transmission rod and is located in the support tube, the clamping rod is coaxially fixed on the driven rod at one end away from the first transmission rod, the clamping rod has a special-shaped structure, and a special-shaped notch that cooperates with the clamping rod is opened at the axis center of the linkage gear.

[0015] By adopting the above-mentioned technical solution, the present application solves the problem of difficulty in linkage adjustment caused by the complex driving structure of the connecting locking assembly. Specifically, the meshing structure of the linkage gear and the rack simplifies the power transmission path, thereby improving the adjustment accuracy of the sliding stroke of the docking plate; the axial separation design of the connecting rod shortens the operation time of the drive mode switching and greatly improves the operating efficiency.

[0016] Optionally, the linkage adjustment unit further includes a limiting rod and a pedal. The limiting rod is coaxially fixed to the end of the clamping rod away from the driven rod, and an annular notch is formed in the limiting rod. The pedal is rotatably connected to the sofa base, and a U-shaped clamping plate is provided at one end of the pedal. The U-shaped clamping plate is slidably clamped in the annular notch.

[0017] By adopting the above technical solution, the present application effectively solves the problem of inconvenient operation of the sofa base connection component in a narrow space. By replacing the traditional manual operation with foot pedal drive, the need for using tools is eliminated. At the same time, by utilizing the sliding fit characteristics of the annular notch and the U-shaped clamping plate, accidental detachment of components during operation is avoided, ensuring the stability and reliability of the adjustment action.

[0018] Optionally, the drive unit includes a passive bevel gear, a rotating rod, a second transmission rod, an active bevel gear and a belt. The passive bevel gear is coaxially fixed to the end of the first transmission rod away from the support cylinder and is located inside the sofa body. The rotating rod is fixed to the sofa armrest and is rotatably connected to the sofa body. The second transmission rod is rotatably arranged inside the sofa body. The active bevel gear is coaxially fixed to one end of the second transmission rod. The belt is arranged between the rotating rod and the second transmission rod.

[0019] By adopting the above technical solution, the present application realizes the drive control of the sofa connection locking component without special tools. The user only needs to perform a conventional operation of turning the armrest to trigger the hidden transmission mechanism, solving the problem of difficult operation of mechanical components in a narrow space. The combined design of bevel gears and belt drive enables the power transmission path to adapt to the complex internal space structure of the sofa, while avoiding damage to the integrity of the product appearance by exposed mechanical components. The enclosed layout of the transmission system also reduces the risk of机构卡滞 caused by dust intrusion.

[0020] Optionally, the sofa base and the pedal are rotatably connected by a shaft rod, and a torsion spring is sleeved on the shaft rod. One end of the torsion spring is fixed to the sofa base, and the other end is fixed to the pedal.

[0021] By adopting the above technical solution, the present application realizes the automatic reset function of the pedal, solves the problem of poor usability caused by manual operation in the prior art, reduces the user's operation steps, and improves the use efficiency of the sofa connection component. Through the physical coupling design of the torsion spring and the shaft rod, the reset action is ensured to be stable and reliable, reducing the risk of reset failure or jamming, and at the same time avoiding the impact of an external reset mechanism on the overall structure of the sofa.

[0022] Optionally, a convex block is fixed on one side of the docking plate, and at least two convex blocks are provided. The two convex blocks are respectively located on the inner and outer sides of the sofa base.

[0023] By adopting the above technical solution, the present application solves the problem of slipping and separation caused by the lack of a limiting structure when the sofa base and the docking plate slide together. The coordinated action of the inner and outer double protrusions forms a mechanical limit to ensure the stable sliding of the docking plate in the base, while simplifying the design and manufacturing cost of the limiting structure.

[0024] The present application also provides a sofa connection assembly installation process, comprising the following steps: S1, driving cooperation, stepping on the pedal to rotate it and drive the driven rod to slide so that the clamping rod and the linkage gear cooperate with each other; S2. Install the components in linkage, rotate the sofa armrest, and drive the linkage gear through the entire drive unit to rotate, so that the rack engages and the docking plate slides, and one end extends out of the sofa base; S3. Install and dock: dock the plug connectors on the two adjacent sofa bases with the locking sleeves, and lock the locking rod into the lock slot; S4. Support locking: pass the support rod through the support rod docking hole and abut against the wedge-shaped notch. At this time, under the action of the gravity of the sofa armrest, the sliding plate slides toward the inside of the docking plate, thereby pulling the locking rod to open and lock the two adjacent sofa bases.

[0025] By adopting the above technical solution, this application solves the problem of limited space for sofa assembly operations. Users only need to step on the pedal and turn the sofa armrest to trigger automatic docking. The installation process is simplified to four consecutive actions, without the need for professional tools or complex operation training. The combination of plug-in structure and gravity locking significantly enhances the connection stability, avoiding the risk of loosening of traditional bolts. The hidden drive component maintains the integrity of the sofa's appearance while ensuring functional reliability.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects: 1. This solution achieves alignment and locking through mechanical linkage, reducing the number of operating steps and resolving the problem of exposed screws in the prior art being easily loosened by external forces. This solution adopts a closed self-locking structure, which improves connection stability. Traditional hidden connection mechanisms require complex assembly and disassembly processes. This solution uses the sofa's own movable parts as a driving source, enabling it to quickly drive the locking unit for linkage during use. The principle of mechanical linkage is used to convert rotational motion into linear displacement to achieve hidden locking. The coaxial plug-in structure and self-locking unit are further designed to ensure that the docking process does not require manual alignment, improving operational convenience. 2. This application implements a non-visual locking operation, allowing users to complete a secure connection with a simple push-in action, eliminating the problem of traditional installation requiring specialized tools and complex operations. The direct mechanical fit between the locking rod and the locking slot forms a rigid connection, eliminating the risk of loosening during long-term use. The completely hidden design of the locking rod in the locked state takes into account both structural reliability and appearance integrity. 3. This application realizes the drive control of the sofa connection and locking components without special tools. The user only needs to rotate the armrest in a conventional manner to trigger the hidden transmission mechanism, which solves the problem of difficult operation of mechanical components in a small space. The combined design of bevel gears and belt drives enables the power transmission path to adapt to the complex internal spatial structure of the sofa, while avoiding damage to the integrity of the product appearance by exposed mechanical components. The closed layout of the transmission system also reduces the risk of dust intrusion causing the mechanism to become stuck, meeting people's usage needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the external structure of a single sofa in this embodiment.

[0028] Figure 2 It is a schematic diagram of the overall structure of the two sofa bodies assembled together in this embodiment.

[0029] Figure 3 2 is a schematic diagram of the sofa base and its overall connection structure in this embodiment.

[0030] Figure 4 2 is a schematic diagram of the docking structure of the plug connector and the locking sleeve in this embodiment.

[0031] Figure 5 It is a partial structural diagram of the connection and locking components in this embodiment.

[0032] Figure 6 Schematic diagram of the locking rod and its connection structure in this embodiment.

[0033] Figure 7 Schematic diagram of the drive assembly structure in this embodiment.

[0034] Figure 8 Schematic diagram of the linkage gear and its overall connection structure in this embodiment.

[0035] Figure 9 Schematic diagram of the follower rod connection structure in this embodiment.

[0036] Description of reference numerals: 1. Sofa body; 2. Sofa armrest; 3. Sofa base; 4. Sofa fixing seat; 5. Connection and locking assembly; 51. Docking plate; 52. Sliding plate; 53. Plug connector; 54. Locking rod; 55. Locking sleeve; 56. Locking slot; 57. Linking rod; 58. Adjustment slot; 59. Adjustment block; 510. First return spring; 511. Support rod; 512. Support rod docking hole; 513. Wedge-shaped notch; 514. Second return spring; 6. Driving assembly; 61. Support cylinder; 62. Linkage gear; 63. Rack; 64. First transmission rod; 65. Driven rod; 66. Connecting rod; 67. Limit rod; 68. Pedal; 69. Passive bevel gear; 610. Turning rod; 611. Second transmission rod; 612. Active bevel gear; 613. Belt. DETAILED DESCRIPTION

[0037] The following is combined with Figures 1-9 The present invention is described in further detail.

[0038] The embodiments of the present invention disclose a sofa connection assembly and an installation process thereof.

[0039] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the first aspect, the present application provides a sofa connection assembly: Reference Figure 1 and Figure 2 The sofa connection component includes a sofa body 1, a sofa armrest 2, a sofa base 3, a sofa fixing seat 4, a connection and locking component 5 and a driving component 6. The sofa body 1 is symmetrically arranged on both sides and is rotatably connected to the sofa armrest 2. The bottom of the sofa body 1 is rotatably connected to the sofa base 3 through the sofa fixing seat 4. The connection and locking component 5 for docking and locking two adjacent sofa bases 3 is arranged in the sofa base 3. The center of the sofa base 3 is provided with a driving component 6 for driving the docking plate 51 to be linked. The driving component 6 includes a linkage adjustment unit and a driving unit.

[0041] The sofa fixing base 4 is the supporting structure connecting the sofa body 1 and the sofa base 3. It can be implemented as a rotating connector with a bearing seat, and its function is to provide rotational freedom for the sofa base 3. The docking plate 51 is a sliding component installed on the side of the sofa base 3. It can be implemented as a metal plate with linear guides. It is used to support the telescopic movement of the sliding plate 52. The drive assembly 6 is the power transmission system used to convert the rotational kinetic energy of the armrest into the linear motion of the docking plate 51.

[0042] Specifically, when two sofas need to be joined, the user rotates the sofa armrest 2 to trigger the drive unit. The drive unit transmits the rotational motion to the linkage adjustment unit via a transmission mechanism. The rack-and-pinion mechanism within the linkage adjustment unit drives the two docking plates 51 to slide outward synchronously. After the docking plates 51 extend beyond the sofa base 3, the sliding plates 52 continue to extend outward along the docking plates 51, allowing the plug connector 53 to axially engage the locking sleeve 55 of the adjacent sofa. Once the plug connector 53 enters the locking sleeve 55, its internal locking rod 54, under the action of an elastic element, automatically springs into the locking slot 56, forming a mechanical interlock. After the docking is complete, the drive assembly 6 resets, retracting the docking plates 51 and concealing the connection structure within the sofa base 3. The entire process requires no manual tools, and the connection structure is completely internal, eliminating the visual distraction of exposed components. It is important to note that sponge baffles can be optionally installed around the bottom outer wall of the sofa body 1 to conceal the connection components, further enhancing the sofa's aesthetics.

[0043] By adopting the above technical solution, this solution realizes rapid alignment and locking through mechanical linkage, reduces the operation steps, and solves the problem in the prior art that exposed screws are easily loosened by external force collision. This solution adopts a closed self-locking structure, and the connection stability is improved. The traditional hidden connection mechanism requires a complicated disassembly and assembly process. This solution uses the sofa's own movable parts as a driving source, so that it can quickly drive the locking unit for linkage when in use, and uses the mechanical linkage principle to convert rotational motion into linear displacement to achieve hidden locking. The coaxial plug-in structure and self-locking unit are further designed to ensure that the docking process does not require manual alignment, thereby improving the convenience of operation.

[0044] Reference Figure 3 and Figure 4 Specifically, the connection and locking assembly 5 includes a docking plate 51, a sliding plate 52, a plug connector 53, a locking sleeve 55 and a locking unit. The two docking plates 51 are symmetrically and slidingly connected to the two sides of the sofa base 3. The sliding plate 52 is slidingly connected to one end of the docking plate 51 located outside the sofa base 3. The plug connector 53 and the locking sleeve 55 are respectively connected to one end of the two sliding plates 52 located outside the docking plate 51, and the plug connector 53 and the locking sleeve 55 are coaxially arranged.

[0045] Regarding the locking unit in the embodiment of the present invention, the locking unit includes a locking rod 54 and a locking groove 56. The locking groove 56 is arranged on the side wall of the locking sleeve 55 and is communicated with the internal cavity of the locking sleeve 55. A strip groove is opened on the side wall of the plug connector 53. One end of the locking rod 54 is rotatably connected in the strip groove and docked with the locking groove 56.

[0046] Specifically, when the plug connector 53 is inserted into the locking sleeve 55, the locking rod 54 contacts the inner wall of the sleeve and rotates and folds until it reaches the locking groove 56, automatically springing into the locking groove 56 to form an interlocking connection. During this process, the length of the strip-shaped notch limits the maximum rotation angle of the locking rod 54, and the through-structure of the locking groove 56 allows the end of the locking rod 54 to be completely hidden within the sleeve. After docking, the locking rod 54 and the locking groove 56 form three points of contact: the hinge point, the point where the rod body contacts the notch, and the point where the end contacts the groove bottom, forming a stable triangular force-bearing structure that enhances stability.

[0047] By adopting the above technical solution, the present application realizes a non-visual locking operation, and the user can complete a stable connection with a simple push-in action, solving the problem that traditional installation requires professional tools and complex operations. The direct mechanical cooperation between the locking rod 54 and the locking slot 56 forms a rigid connection, avoiding the risk of loosening during long-term use. The completely hidden design of the locking rod 54 in the locked state takes into account both structural reliability and appearance integrity.

[0048] Reference Figure 5 and Figure 6 Specifically, in the embodiment of the present invention, the locking unit further includes a linkage rod 57, an adjustment slot 58, an adjustment block 59 and a first return spring 510. The present application realizes the automated operation of docking and locking the sofa base 3, eliminating the tedious steps of manually adjusting the lock rod 54. The rigid expansion action of the lock rod 54 driven by the linkage rod 57 can ensure sufficient contact between the lock rod 54 and the lock slot 56, avoiding loose connection due to insufficient locking force. The elastic force of the first return spring 510 enables the lock rod 54 to quickly reset when the locked state is released, providing convenience for repeated disassembly and assembly. The guiding and matching structure of the adjustment slot 58 and the adjustment block 59 effectively prevents accidental displacement of the lock rod 54 in the non-operating state, thereby improving the reliability of the connection assembly.

[0049] The linkage rod 57 is slidably set in the internal cavity of the plug connector 53, the adjustment groove 58 is set on the linkage rod 57, the adjustment block 59 is fixed on the rotation connection end of the locking rod 54 and the plug connector 53, and is slidably engaged in the adjustment groove 58, and the first return spring 510 is installed in the internal cavity of the plug connector 53, and one end is abutted against the linkage rod 57.

[0050] Specifically, when the plug connector 53 is mated with the locking sleeve 55, the linkage rod 57 is pushed inward by an external force along the cavity of the plug connector 53. At this point, the adjustment slot 58 and the adjustment block 59 cooperate to force the locking rod 54 to rotate outward about the rotating connection end, allowing the locking rod 54 to engage within the locking slot 56 and complete the locking process. The first return spring 510 is in a stretched state during the locking process. To release the lock, the linkage rod 57 slides in the opposite direction under the elastic force of the first return spring 510. The adjustment slot 58 drives the adjustment block 59 in the opposite direction, and the locking rod 54 folds inward and disengages the locking slot 56. The rotation angle of the locking rod 54 is precisely defined by the curved shape of the adjustment slot 58, ensuring that the end of the locking rod 54 forms surface contact with the inner wall of the locking slot 56, thus avoiding localized stress concentration.

[0051] In an embodiment of the present invention, the locking unit further includes a support rod 511, a support rod docking hole 512, a wedge-shaped notch 513 and a second return spring 514. The present application realizes the automatic locking of the connection locking assembly 5 when the sofa armrest 2 is folded down, and solves the problem of loose connection caused by the asynchronous locking state of adjacent sofa bases 3. The inclined surface of the support rod 511 and the wedge-shaped notch 513 cooperates to ensure the precise control of the opening angle of the locking rod 54. The elastic support of the second return spring 514 effectively prevents positional deviation during the locking process, so that the adjacent sofa bases 3 form a stable rigid connection after assembly.

[0052] Specifically, when the sofa armrest 2 is folded down, the support rod 511 rotates with the armrest, resulting in lateral displacement. Its distal end passes through the support rod docking hole 512 of the docking plate 51 and contacts the wedge-shaped notch 513 of the sliding plate 52. Due to the inclined surface of the wedge-shaped notch 513, the lateral movement of the support rod 511 is converted into a longitudinal sliding displacement of the sliding plate 52 along the docking plate 51, thereby driving the plug connector 53 and the locking sleeve 55 to produce relative movement. This relative movement triggers the locking rod 54 to rotate and open, causing the distal end of the locking rod 54 to engage the locking groove 56 of the locking sleeve 55, completing the locking. The second return spring 514 is compressed as the sliding plate 52 moves. When the lock is released, the elastic restoring force pushes the sliding plate 52 back to its initial position.

[0053] The support rod docking hole 512 is set through the docking plate 51, and the wedge-shaped notch 513 is concavely set on the sliding plate 52. One end of the support rod 511 is rotatably connected to the sofa armrest 2, and the other end passes through the support rod docking hole 512 and slides into contact with the wedge-shaped notch 513. The second return spring 514 is installed inside the docking plate 51, and one end is in contact with the sliding plate 52.

[0054] Reference Figure 7, in the embodiments of the present application, the linkage adjustment unit includes a support cylinder 61, a linkage gear 62, a rack 63, a first transmission rod 64, a driven rod 65, and a clamping rod 66. The present application solves the problem of difficult linkage adjustment caused by the complex drive structure of the connection locking component 5, specifically manifested as follows: The meshing structure of the linkage gear 62 and the rack 63 simplifies the power transmission and improves the adjustment accuracy of the sliding stroke of the docking plate 51; The axial separation design of the clamping rod 66 shortens the operation time of the drive mode switching operation, and the operation efficiency is greatly improved.

[0055] The support cylinder 61 is fixed at the center of the bottom of the sofa fixed seat 4. The linkage gear 62 is coaxially rotatably connected to the bottom end of the support cylinder 61. The rack 63 is fixed on one side of the docking plate 51 close to the linkage gear 62 and meshes with the linkage gear 62. The first transmission rod 64 is rotatably connected inside the sofa main body 1, passes through the sofa fixed seat 4, and part of it is located inside the support cylinder 61. The driven rod 65 is slidably connected to the axis of the first transmission rod 64 and is located inside the support cylinder 61. The clamping rod 66 is coaxially fixed to one end of the driven rod 65 far from the first transmission rod 64. The clamping rod 66 has a special-shaped structure, and a special-shaped notch matching the clamping rod 66 is opened at the axis of the linkage gear 62.

[0056] When the special-shaped end of the clamping rod 66 is inserted into the special-shaped notch of the linkage gear 62, the rotational power of the first transmission rod 64 is transmitted to the linkage gear 62 through the driven rod 65. The linkage gear 62 meshes with the rack 63 to drive the docking plate 51 to slide. When it is necessary to release the drive connection, the driven rod 65 drives the clamping rod 66 to axially withdraw from the special-shaped notch. At this time, the linkage gear 62 is in a free state. The two-way synchronous movement of the docking plate 51 is realized through the gear-rack 63 meshing mechanism, avoiding the movement interference problem existing in the multi-link structure. At the same time, the axial separation structure of the clamping rod 66 enables the drive component 6 to have the function of switching the working mode.

[0057] Refer to Figure 8 and Figure 9 , the linkage adjustment unit further includes a limit rod 67 and a pedal 68. The limit rod 67 is coaxially fixed to one end of the clamping rod 66 far from the driven rod 65, and an annular notch is opened on the limit rod 67. The pedal 68 is rotatably connected to the sofa base 3, and a U-shaped clamping plate is provided at one end of the pedal 68. The U-shaped clamping plate is slidably clamped in the annular notch.

[0058] When it is necessary to adjust the connection state of adjacent sofa bases 3, the user applies a downward pressure on the pedal 68 with the foot, driving the U-shaped clamping plate to slide along the annular notch of the limit rod 67. This sliding action is converted into the axial movement of the limit rod 67, and then drives the docking of the clamping rod 66 and the special-shaped notch of the linkage gear 62, so that the linkage gear 62 and the clamping rod 66 are in a locked state. This process converts the traditional gear locking action that requires manual operation into a foot-operated drive, and the operation position is transferred from the bottom of the sofa to the side open area.

[0059] This application effectively solves the problem of inconvenient operation of the sofa base connection component in a narrow space. By replacing the traditional manual operation with foot pedal drive, the need for using tools is eliminated. At the same time, by utilizing the sliding fit characteristics of the annular notch and the U-shaped clamping plate, accidental detachment of components during operation is avoided, ensuring the stability and reliability of the adjustment action.

[0060] Specifically, the drive unit includes a passive bevel gear 69, a rotating rod 610, a second transmission rod 611, an active bevel gear 612, and a belt 613. This application realizes the drive control of the sofa connection locking component 5 without the condition of using special tools. The user only needs to perform a conventional operation of turning the armrest to trigger the hidden transmission mechanism, solving the problem of difficult operation of mechanical components in a narrow space. The combined design of bevel gears and belt drive makes the power transmission path adapt to the complex internal space structure of the sofa, while avoiding damage to the integrity of the product appearance caused by exposed mechanical components. The enclosed layout of the transmission system also reduces the risk of mechanism jamming caused by dust intrusion.

[0061] The passive bevel gear 69 is coaxially fixed at one end of the first transmission rod 64 away from the support cylinder 61 and is located inside the sofa main body 1. The rotating rod 610 is fixed on the sofa armrest 2 and is rotationally connected to the sofa main body 1. The second transmission rod 611 is rotatably arranged inside the sofa main body 1. The active bevel gear 612 is coaxially fixed at one end of the second transmission rod 611. The belt 613 is arranged between the rotating rod 610 and the second transmission rod 611.

[0062] As Figure 7 shown, when the user rotates the sofa armrest 2, the rotating rod 610 fixedly connected to the armrest rotates synchronously, and the rotational power is transmitted to the second transmission rod 611 through the pulley and the belt 613. The active bevel gear 612 at the end of the second transmission rod 611 meshes with the passive bevel gear 69, converting the horizontal rotational movement into a vertical rotational movement, and driving the first transmission rod 64 to generate an axial rotation. The rotation of the first transmission rod 64 drives the clamping rod 66 and the linkage gear 62 in the linkage adjustment unit to synchronously link, thereby controlling the sliding displacement of the docking plate 51. This entire transmission path is located inside the cavity of the sofa main body. By adapting to the three-dimensional space layout of the sofa frame through the vertical meshing characteristics of the bevel gears, and at the same time, the elastic characteristics of the belt drive can effectively reduce the installation error.

[0063] In the embodiment of this application, the sofa base 3 and the pedal 68 are rotationally connected through a shaft rod, and a torsion spring is sleeved on the shaft rod. One end of the torsion spring is fixed to the sofa base 3, and the other end is fixed to the pedal 68.

[0064] When the pedal 68 is subjected to pedaling pressure, the pedal 68 rotates around the axis of the shaft. At this time, the spiral part of the torsion spring produces elastic deformation and stores mechanical energy. When the pedaling action is completed, the torsion spring releases the stored elastic potential energy, driving the pedal 68 to rotate in the opposite direction along the axis of the shaft, so that it automatically returns to its initial position.

[0065] This application implements an automatic reset function for pedal 68, resolving the inconvenience inherent in manual operation in the prior art. This reduces the number of user steps and improves the efficiency of the sofa's connection assembly. The physical coupling of the torsion spring and the shaft ensures a stable and reliable reset action, reducing the risk of reset failure or jamming, while also preventing the external reset mechanism from affecting the sofa's overall structure.

[0066] Specifically, in the embodiment of the present application, regarding the docking plate 51 , a protrusion is fixed on one side of the docking plate 51 , and at least two protrusions are provided, and the two protrusions are respectively located on the inner and outer sides of the sofa base 3 .

[0067] This application solves the problem of slippage and separation caused by the lack of a limiting structure when the sofa base 3 and the docking plate 51 are slidingly matched. A mechanical limit is formed through the coordinated action of the inner and outer double protrusions to ensure the stable sliding of the docking plate 51 in the base, while simplifying the design and manufacturing cost of the limiting structure.

[0068] When the docking plate 51 slides in the sofa base 3, the contact between the outer protrusions and the internal structure of the base prevents the docking plate 51 from moving excessively toward the center of the base, while the inner protrusions contact the edge structure of the base to prevent the docking plate 51 from detaching from the base.

[0069] Secondly, refer to Figures 1-9 , the present application also provides an installation process for a sofa connection assembly, comprising the following steps: S1, driving cooperation, stepping on the pedal 68 to rotate it and drive the driven rod 65 to slide so that the clamping rod 66 and the linkage gear 62 cooperate with each other; S2. Install the components in linkage, rotate the sofa armrest 2, and drive the linkage gear 62 to rotate through the entire drive unit, so that the rack 63 engages and links. At this time, the docking plate 51 slides, and one end extends out of the sofa base 3; S3, docking installation, docking the plug connectors 53 on two adjacent sofa bases 3 with the locking sleeves 55, and making the locking rod 54 snap into the locking groove 56; S4, support locking, pass the support rod 511 through the support rod docking hole 512 and abut against the wedge-shaped notch 513. At this time, under the action of the gravity of the sofa armrest 2, the sliding plate 52 slides toward the inside of the docking plate 51, thereby pulling the locking rod 54 to open and lock the two adjacent sofa bases 3.

[0070] This application solves the problem of limited space for sofa assembly operations. Users only need to step on the pedal 68 and turn the sofa armrest 2 to trigger automatic docking. The installation process is simplified to four consecutive actions, and no professional tools or complex operation training are required. The combination of the plug-in structure and gravity locking significantly enhances the connection stability, avoiding the risk of loosening of traditional bolts. The hidden drive component 6 maintains the integrity of the sofa's appearance while ensuring functional reliability.

[0071] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. Sofa connection assembly, characterized in that, include: A sofa body (1), wherein sofa armrests (2) are symmetrically arranged on both sides of the sofa body (1) and are rotatably connected thereto, and the bottom of the sofa body (1) is rotatably connected to a sofa base (3) via a sofa fixing seat (4); A connecting and locking assembly (5) for docking and locking two adjacent sofa bases (3), wherein the connecting and locking assembly (5) is arranged in the sofa base (3), and comprises a docking plate (51), a sliding plate (52), a plug connector (53), a locking sleeve (55) and a locking unit, wherein the two docking plates (51) are symmetrically and slidably connected to both sides of the sofa base (3), the sliding plate (52) is slidably connected to one end of the docking plate (51) located outside the sofa base (3), the plug connector (53) and the locking sleeve (55) are respectively connected to one end of the two sliding plates (52) located outside the docking plate (51), and the plug connector (53) and the locking sleeve (55) are coaxially arranged; A driving assembly (6) for driving the docking plate (51) in linkage is provided at the center of the sofa base (3), and the driving assembly (6) comprises a linkage adjustment unit and a driving unit.

2. The sofa connection assembly according to claim 1, characterized in that: The locking unit comprises a locking rod (54) and a locking groove (56), wherein the locking groove (56) is arranged on the side wall of the locking sleeve (55) and is communicated with the internal cavity of the locking sleeve (55), and a strip-shaped slot is provided on the side wall of the plug connector (53), and one end of the locking rod (54) is rotatably connected in the strip-shaped slot and docked with the locking groove (56).

3. The sofa connection assembly according to claim 2, characterized in that: The locking unit further comprises a linkage rod (57), an adjustment slot (58), an adjustment block (59) and a first return spring (510), wherein the linkage rod (57) is slidably arranged in the internal cavity of the plug connector (53), the adjustment slot (58) is arranged on the linkage rod (57), the adjustment block (59) is fixed to the rotation connection end of the locking rod (54) and the plug connector (53), and is slidably engaged in the adjustment slot (58), and the first return spring (510) is installed in the internal cavity of the plug connector (53), and one end thereof abuts against the linkage rod (57).

4. The sofa connection assembly according to claim 3, characterized in that: The locking unit further comprises a support rod (511), a support rod docking hole (512), a wedge-shaped notch (513) and a second return spring (514); the support rod docking hole (512) is provided through the docking plate (51); the wedge-shaped notch (513) is provided in a recessed manner on the sliding plate (52); one end of the support rod (511) is rotatably connected to the sofa armrest (2); the other end passes through the support rod docking hole (512) and is in sliding contact with the wedge-shaped notch (513); the second return spring (514) is installed inside the docking plate (51), and one end thereof is in contact with the sliding plate (52).

5. The sofa connection assembly according to claim 1, characterized in that: The linkage adjustment unit includes a support cylinder (61), a linkage gear (62), a rack (63), a first transmission rod (64), a driven rod (65) and a clamping rod (66). The support cylinder (61) is fixed at the center of the bottom of the sofa fixing base (4). The linkage gear (62) is coaxially and rotatably connected to the bottom end of the support cylinder (61). The rack (63) is fixed on one side of the docking plate (51) close to the linkage gear (62) and meshes with the linkage gear (62). The first transmission rod (64) is rotatably connected inside the sofa main body (1), passes through the sofa fixing base (4), and part of it is located inside the support cylinder (61). The driven rod (65) is slidably connected to the axis of the first transmission rod (64) and is located inside the support cylinder (61). The clamping rod (66) is coaxially fixed to one end of the driven rod (65) far from the first transmission rod (64). The clamping rod (66) has a special-shaped structure, and a special-shaped notch matching the clamping rod (66) is provided at the axis of the linkage gear (62).

6. The sofa connection assembly according to claim 5, characterized in that: The linkage adjustment unit further includes a limit rod (67) and a pedal (68). The limit rod (67) is coaxially fixed to one end of the clamping rod (66) far from the driven rod (65), and an annular notch is provided on the limit rod (67). The pedal (68) is rotatably connected to the sofa base (3), and a U-shaped clamping plate is provided at one end of the pedal (68), and the U-shaped clamping plate is slidably clamped in the annular notch.

7. The sofa connection assembly according to claim 6, characterized in that: The driving unit includes a passive bevel gear (69), a rotating rod (610), a second transmission rod (611), a driving bevel gear (612) and a belt (613). The passive bevel gear (69) is coaxially fixed to one end of the first transmission rod (64) far from the support cylinder (6) and is located inside the sofa main body (1). The rotating rod (610) is fixed to the sofa armrest (2) and is rotatably connected to the sofa main body (1). The second transmission rod (611) is rotatably arranged inside the sofa main body (1). The driving bevel gear (612) is coaxially fixed to one end of the second transmission rod (611). The belt (613) is arranged between the rotating rod (610) and the second transmission rod (611).

8. The sofa connection assembly according to claim 6, characterized in that: The sofa base (3) and the pedal () are rotatably connected by a shaft rod, and a torsion spring is sleeved on the shaft rod. One end of the torsion spring is fixed to the sofa base (3), and the other end is fixed to the pedal (68).

9. The sofa connection assembly according to claim 1, characterized in that: One side of the docking plate (51) is fixed with a convex block, and at least two convex blocks are provided. The two convex blocks are respectively located inside and outside the sofa base (3).

10. A sofa connection assembly installation process, applied to the sofa connection assembly according to any one of claims 1 to 9, characterized in that: It includes the following steps: S1. Driving cooperation: Step on the pedal (68) to make it rotate and drive the driven rod (65) to slide so that the clamping rod (66) and the linkage gear (62) are mutually cooperated and docked; S2. Linkage of the installation components: Rotate the sofa armrest (2), and through the driving unit as a whole, drive the linkage gear (62) to rotate, so that the rack (63) meshes and links, and at this time, the docking plate (51) slides, and one end extends out of the sofa base (3); S3, docking, docking the plug connectors (53) on the two adjacent sofa bases (3) with the locking sleeves (55), and making the locking rod (54) snap into the locking groove (56); S4, support locking, pass the support rod (511) through the support rod docking hole (512) and abut against the wedge-shaped notch (513), at this time, under the action of the gravity of the sofa armrest (2), the sliding plate (52) slides toward the inside of the docking plate (51), thereby pulling the locking rod (54) to open and lock the two adjacent sofa bases (3).

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