Folding sofa and sofa interlocking mechanism

Abstract

This invention provides a folding sofa and sofa interlocking mechanism that simultaneously control the backrest and front panel with a single power source. [Solution] The interlocking mechanism includes a front link assembly and a rear link assembly 21. By providing the front link assembly and the rear link assembly, and by controlling the rotation of the power generation rod 2022 using a single drive structure, interlocking control of the backrest and the front panel is achieved. This design not only simplifies the operation process, but also allows the user to simultaneously control the deployment and folding of the backrest and the front panel by operating a single drive structure.

Description

Technical Field

[0001] The present invention relates to the field of sofas, and particularly to folding sofas and sofa linkage mechanisms.

Background Art

[0002] The folding sofa in the present application refers to a sofa with a backrest that can be deployed and folded, having a front panel that can be lifted at the bottom of the sofa. After the front panel is lifted, it is used to place and support the legs. The folding sofa forms a reclining chair after deployment and becomes a normal sofa after folding / contracting.

[0003] Conventional folding sofas generally have the front panel and the backrest driven separately. Of course, it is also possible to select to simultaneously press the buttons for driving the front panel and the backrest to operate jointly, but this requires two sets of drive systems, resulting in an increase in cost and weight. Therefore, in order to reduce weight and cost, there is a need for a folding sofa and a sofa linkage mechanism that can drive the front panel and the backrest with one power source.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a folding sofa and a sofa linkage mechanism that can simultaneously control the backrest and the front panel with one power source.

Means for Solving the Problems

[0005] To achieve the above object, the present invention provides the following technical solutions.

[0006] A sofa linkage mechanism comprising a base frame, a back plate connected to the base frame, and a front panel, configured to enable the sofa to have a deployed state and a contracted state. A front link assembly for controlling the front panel to rotate outward from the front of the sofa base frame to support the legs, comprising: a force generating unit; a main support unit; and a front fixing block fixed to the side of the sofa base frame, wherein one end of the force generating unit is pivotally attached to the sofa base frame via the front fixing block, and the other end is pivotally attached to the main support unit, and the main support unit abuts against the inside of the front link assembly, The rear link assembly for controlling the back panel to rotate relative to the sofa base frame, The aforementioned rear link assembly is The present invention provides a multifunctional sofa that includes an interlocking rod, a rear lever, and a rear fixing block fixed to the side of the sofa base frame, wherein the rear lever is connected to the back panel, the rear lever is pivotally attached to the sofa base frame via the rear fixing block, the rear lever is pivotally attached to one end of the interlocking rod, and the other end of the interlocking rod is pivotally attached to the force generating part, thereby interlocking the front link assembly and the rear link assembly.

[0007] Furthermore, the main support section includes a lower link, an extrusion rod, and a panel rod, the front free ends of the lower link and the extrusion rod are each pivotally attached to a panel rod, and the panel rod is provided on the inside of the front panel. The aforementioned power generation unit comprises a crossing rod and a power generation rod, The upper free end of the crossing rod is pivotally attached to the front fixed block, and the rear free ends of the push rod and the lower link are connected to the crossing rod, thereby linking the push rod, the lower link, and the panel rod to the crossing rod. The power generation rod includes a linked arm and a power generation arm integrally molded at a predetermined angle to each other, the upper free end of the linked arm being pivotally attached to the front fixed block (203), and the lower free end of the power generation arm being pivotally attached to the middle of the crossing rod.

[0008] Furthermore, the predetermined angle is between 100 and 150 degrees.

[0009] Furthermore, the power generation rod further comprises a drive arm, one end of which is pivotally attached to the end of the power generation arm and the other end of which is pivotally attached to the crossing rod, and is used to reduce the relative displacement between the interlocking arm and the power generation arm and to raise the raised position of the panel rod.

[0010] Furthermore, the interlocking rod is pivotally attached to the power-generating arm.

[0011] Furthermore, the interlocking mechanism is A drive crossbar connected between the two aforementioned power-generating arms, The sofa base frame is provided between the left and right side walls and further comprises a connecting rod parallel to the drive crossbar, The two front fixing blocks are each fixed correspondingly between the side walls, and the two rear fixing blocks are each fixed correspondingly between the side walls.

[0012] Furthermore, the structure of the rear lever includes a rotating shaft, a drive end, and an execution end, the rotating shaft being connected to the back plate, The execution end is rotatably connected to the interlocking rod, and the drive end is rotatably connected to the rear fixed block. When the back plate is pushed by an external force to rotate relative to the sofa base frame, the rotating shaft is driven to rotate synchronously, and the rotating shaft transmits the pushing force from the rear lever to the interlocking rod by linking the drive end and the execution end of the rotating shaft.

[0013] Furthermore, it is equipped with an electric drive cylinder, The electric drive cylinder is provided between the drive crossbar and the connecting rod, and the electric drive cylinder causes the drive crossbar and the connecting rod to move away from or closer to each other, thereby driving the back panel and the front panel to unfold or fold relative to the sofa base frame.

[0014] Furthermore, the retractable end of the electric drive cylinder has a gripping mechanism, The gripping mechanism comprises a pivot shaft connected to the extension / retraction end of the electric drive cylinder and a gripper connected to the pivot shaft, the gripper being connected to the drive crossbar, and the gripping mechanism causes the extension / retraction direction of the electric drive cylinder to conform to the drive crossbar.

[0015] This application further provides a multifunctional sofa having both an extended and a retracted state. The multifunctional sofa comprises a sofa base frame (1), a front panel (16) connected to the front of the sofa base frame, and a backrest (10) connected to the rear upper of the sofa base frame, and further comprises an interlocking mechanism (2) for extending or folding the backrest and the front panel relative to the sofa base frame.

[0016] The aforementioned interlocking mechanism is A front link assembly for controlling the front panel to rotate outward from the front of the sofa base frame to support the legs, comprising: a force generating unit; a main support unit; and a front fixing block fixed to the side of the sofa base frame, wherein one end of the force generating unit is pivotally attached to the sofa base frame via the front fixing block, and the other end is pivotally attached to the main support unit, and the main support unit abuts against the inside of the front link assembly, The rear link assembly for controlling the back panel to rotate relative to the sofa base frame, The aforementioned rear link assembly is It includes an interlocking rod, a rear lever, and a rear fixing block fixed to the side surface of the sofa base frame. The rear lever is connected to the back panel, and the rear lever is pivotally attached to the sofa base frame via the rear fixing block. The rear lever is pivotally attached to one end of the interlocking rod, and by pivotally attaching the other end of the interlocking rod to the power generating part, the front link assembly and the rear link assembly are interlocked.

Advantages of the Invention

[0017] Based on the above, the present invention has the following beneficial effects compared with the prior art.

[0018] By providing a front link assembly and a rear link assembly and controlling the rotation of the power rod using a single drive structure, the present invention realizes the interlocking control between the backrest and the front panel. Such a design not only simplifies the operation process, but also allows the user to control the deployment and folding of the backrest and the front panel simultaneously by operating only one drive structure, improving the convenience of use. At the same time, since a single power source is adopted, compared with the folding sofa that requires two sets of drive systems in the prior art, the present invention significantly reduces the cost and weight, making the product more competitive in the market. Furthermore, through the ingenious design of the front link assembly and the rear link assembly, the stability and smoothness of the sofa deployment and folding process are guaranteed, improving the user experience.

Brief Description of the Drawings

[0019] [Figure 1] It is an example of a schematic configuration diagram of a folding sofa in an embodiment. [Figure 2] It is an example of a schematic configuration diagram inside the folding sofa. [Figure 3] It is an example of a side schematic view of the contracted state of the interlocking mechanism. [Figure 4] It is an example of a side schematic view of the deployed state of the interlocking mechanism. [Figure 5]This is an example of a schematic diagram showing the contracted state of the interlocking mechanism. [Figure 6] This is an example of a schematic diagram showing the deployed state of the interlocking mechanism. [Modes for carrying out the invention]

[0020] The technical solutions in the embodiments of the present invention will be clearly and fully described below with reference to the drawings of the embodiments. Of course, the embodiments described are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art, assuming no creative work has been done by the embodiments of the present invention, all fall within the technical scope of the present invention.

[0021] Example 1 Referring to Figures 1 to 6, this embodiment provides a multi-functional sofa 100 having an extended state and a retracted state, which are achieved by providing an interlocking mechanism inside.

[0022] The multifunctional sofa 100 comprises a sofa base frame 1, a front panel 16 connected to the front of the sofa base frame 1, and a backrest 10 connected to the rear upper of the sofa base frame 1, and further comprises an interlocking mechanism 2 for extending or folding the backrest 10 and the front panel 16 relative to the sofa base frame 1.

[0023] Referring to Figure 1, this sofa base frame 1 comprises a seat plate 11, side plates 12, and a front panel 16. Springs are provided on the seat plate 11 to enhance comfort, and cushions are placed on the springs to form the sofa seat.

[0024] Below the seat plate 11 is the position of the sofa base frame 1, and the sofa base frame 1 is provided with an interlocking mechanism 2 for controlling the deployment of the front panel 16 and the backrest 10, so that the sofa can have a retracted state as a chair and a reclined state as an extended state. In the retracted state, the front panel 16 is positioned vertically, and the backrest is in an upright position, with a small acute angle (for example, 5° in this embodiment) between the backrest and the vertical line.

[0025] A front fixing block 203 and a rear fixing block 212 are fixed to the inside of the side panel 12 to provide a pivot point for the interlocking mechanism 2. The front fixing block 203 is located close to the front panel 16 of the sofa side panel 12, and the rear fixing block 212 is located close to the back panel 10 of the side panel 12.

[0026] The interlocking mechanism 2 comprises a front link assembly 20 and a rear link assembly 21. Inside the front panel 16, a panel rod 2013 is fixed in parallel to the front link assembly 20, which is driven by the front link assembly 20 to switch between an extended and retracted state.

[0027] The front link assembly 20 comprises a force generating section 202, a main support section 201, and a front fixing block 203.

[0028] The main support portion 201 is pivotally attached at one end to the force generating portion 202 and at the other end to one end of the panel rod 2013. In the retracted state, the main support portion 201 is pivotally attached to the top end of the panel rod 2013. The main support portion 201 comprises a lower link 2012 and an extrusion rod 2011. The front free ends of the lower link 2012 and the extrusion rod 2011 are each pivotally attached to one panel rod 2013, which is provided inside the front panel 16.

[0029] The force generation unit 202 includes a crossing rod 2021 and a force generation rod 2022. Here, the upper free end of the crossing rod 2021 is pivotally attached to the front fixed block 203, and the rear free ends of the push rod 2011 and the lower link 2012 are connected to the middle and lower free ends of the crossing rod 2021, respectively, thereby linking the push rod 2011, the lower link 2012, and the panel rod 2013 to the crossing rod 2021.

[0030] The crossing rod 2021 is pivotally attached at one end to the lower link 2012, away from the panel rod 2013, and at the other end to the front fixing block 203, facing the front fixing block 203. The crossing rod 2021 and the extrusion rod 2011 intersect and are pivotally attached at the intersection, which will be named "intersection 7" as a characteristic name for the purposes of the following description. Intersection 7 may be obtained, for example, by a pivot structure.

[0031] The power generation rod 2022 includes an interlocking arm 2000 and a power generation arm 2001 that are integrally molded to form a predetermined angle with respect to each other. The upper free end of the interlocking arm 2000 is pivotally attached to the front fixed block 203, and the lower free end of the power generation arm 2001 is pivotally attached to the middle of the intersecting rod 2021.

[0032] Furthermore, although the interlocking arm 2000 and the power-generating arm 2001 of the power-generating rod 2022 are integrally molded, they may be optimized to form an angle so that the power-generating rod 2022 appears bent. Such a structure makes the entire interlocking mechanism more compact and effective. The predetermined angle is 100 to 150 degrees, and in this embodiment, for example, it is preferably 120 degrees.

[0033] Furthermore, to make the interlocking of the front link assembly 20 smoother and to drive the front panel 16 and to make the lifting angle and position more comfortable and smoother, the force generation unit 202 further includes a drive arm 2023, one end of which is pivotally attached to the end of the force generation arm 2001 and the other end of which is pivotally attached to the crossing rod 2021, and the drive arm 2023 is used to reduce the relative displacement between the interlocking arm 2000 and the force generation arm 2001 and to raise the lifted position of the panel rod 2013. More preferably, the ends of the drive arm 2023 and the extrusion rod 2011 are both overlapped and pivotally attached at the same point in the middle of the crossing rod 2021.

[0034] Furthermore, the interlocking rod 210 is pivotally attached to the interlocking arm 2000.

[0035] The rear link assembly 21 links the unfolding and uprighting of the back panel 10, and in cooperation with the front panel 16, can form the unfolded and retracted states of the sofa.

[0036] The rear link assembly 21 comprises a linkage rod 210, a rear lever 211, and a rear fixing block 212 fixed to the side of the sofa base frame 1, the rear lever 211 being connected to the back plate 10.

[0037] Here, the structure of the rear lever 211 comprises a rotating shaft 2112, a drive end 2110, and an operating end 2111, the rotating shaft 2112 being connected to the back plate 10, the operating end 2111 being rotatably connected to the interlocking rod 210, and the drive end 2110 being rotatably connected to the rear fixing block 212.

[0038] When the back plate 10 is pushed by an external force to rotate relative to the sofa base frame 1, the rotating shaft 2112 is driven to rotate synchronously, and the rotating shaft 2112 interlocks the drive end 2110 and the execution end 2111, thereby transmitting the pushing force from the rear lever 211 to the interlocking rod 210.

[0039] The rear lever 211 has a structure that uses the principle of leverage and comprises a drive end 2110, a rotating shaft 2112, and an operating end 2111. The rotating shaft 2112 is pivotally attached to the side plate 12 as the fulcrum of the rear lever 211, specifically fixed to the rear fixing block 212. The interlocking rod 210 pushes the drive end 2110, allowing the rear lever 211 to rotate around the rotating shaft 2112. Furthermore, the operating end 2111 rotates around the rotating shaft 2112, and the back plate 10 is fixed to the operating end 2111, driving the back plate 10 to unfold and stand upright in the rotation process of the operating end 2111.

[0040] In this embodiment, in order to operate the front link assembly 20 and the rear link assembly 21 in synchronous motion, the front end of the interlocking rod 210 is pivotally attached to the interlocking arm 2000 of the force generating unit 202. When an external force drives the back plate 10, the external force is transmitted to the interlocking rod 210 via the rear lever 211, pushing the force generating unit 202 to move the front link assembly 20, and simultaneously extending and retracting the front panel 16 and back plate 10 of the sofa base frame 1.

[0041] For example, in the contracted state, as shown in Figures 3 and 5, when a thrust is applied to the force generating unit 202 in the direction of the panel rod 2013, the force generating unit 202 rotates around its apex and pushes the main support unit 201 in the direction of the panel rod 2013, while the crossing rod 2021 rotates around its apex. At this time, due to the connection at the intersection 7, the front fixing block 203, the main support unit 201, the force generating unit 202, and the crossing rod 2021 form a rectangle at the intersection 7. In this rectangle, the front fixing block 203 is fixed and does not move, but rotates around two points, front and rear, of the fixing plate. The pushing of the force generating unit 202 moves the intersection 7 diagonally upward in the direction of the panel rod 2013. When it reaches the end of the movement, the intersection 7 is located diagonally above the starting point and further moves the position of the panel rod 2013 diagonally upward. At this time, the crossing rod 2021 intersects with the extrusion rod 2011 of the main support section 201. From the intersection 7 to the panel rod 2013, it is the extrusion rod 2011, and from the intersection 7 to the force generating section 202, it is the drive arm 2023. The extrusion rod 2011 is located above the crossing rod 2021, and the drive arm 2023 is located below the crossing rod 2021.

[0042] In the area of ​​intersection 7 toward panel rod 2013, the extrusion rod 2011, crossing rod 2021, lower link 2012, and panel rod 2013 form a rectangle, and within this rectangle, the posture of panel rod 2013 or its angle with respect to the horizontal is controlled by adjusting the angle between drive arm 2023 and extrusion rod 2011, so that in the deployed state the angle between panel rod 2013 and the horizontal is 5 to 85°. After fixing the front panel 16 on panel rod 2013, as shown in Figures 4 and 6, the user's legs can be placed on the front panel 16 during use to support and maintain a comfortable position for the user's legs.

[0043] In the retracted state, the panel rod 2013 is vertical, allowing the front panel 16 to be stored at the front of the bottom of the sofa seat. The position of the panel rod 2013 in the retracted state and in the unfolded state are fixed values.

[0044] Furthermore, the number of interlocking mechanisms 2 is set according to the width of the sofa; generally, two can be set for a single-seater sofa, and three or four for a three-seater sofa. In this embodiment, the structure will be described using a single-seater sofa as an example. There are two interlocking mechanisms 2, each provided on an opposing side of the two side panels 12.

[0045] Preferably, the state change of the interlocking mechanism 2 can be stably generated by electric power, thereby enabling the sofa to be stably unfolded or folded.

[0046] As shown in Figure 2, the sofa interlocking mechanism 2 of this embodiment comprises a drive crossbar 22 connected between the two power-generating arms 2001, a connecting rod 13 provided between the left and right side walls 12 of the sofa base frame 1 and parallel to the drive crossbar 22, and further comprises one electric drive cylinder 23.

[0047] The electric drive cylinder 23 is provided between the drive crossbar 22 and the connecting rod 13, and the electric drive cylinder 23 causes the drive crossbar 22 and the connecting rod to move away from or closer to each other, thereby driving the back panel and the front panel to unfold or fold relative to the sofa base frame.

[0048] Here, the extension and retraction end of the electric drive cylinder 23 has a gripping mechanism 24, the gripping mechanism 24 comprises a pivot shaft 242 connected to the extension and retraction end of the electric drive cylinder 23 and a gripper 243 connected to the pivot shaft 242, the gripper 243 is connected to the drive crossbar 22, and the gripping mechanism 24 adjusts the extension and retraction direction of the electric drive cylinder 23 to match the drive crossbar 22. In the operation process of the front link assembly 20 and the rear link assembly 21, the drive crossbar 22 rotates along with the rotation of the power generation unit 202, so the pivot shaft 242 of the gripping mechanism 24 can ensure that the gripper 243 always firmly grips the drive crossbar 22 without hindering the rotation of the drive crossbar 22.

[0049] When a sofa is relatively heavy or oversized, power assistance is needed to improve comfort. In this case, an electric drive cylinder is added. The electric drive cylinder 23 is provided between the drive crossbar 22 and the connecting rod 13, and the electric drive cylinder 23 causes the drive crossbar 22 and the connecting rod 13 to move away from or closer to each other, thereby driving the backrest 10 and the front panel 16 to unfold or fold relative to the sofa base frame. The extension end of the electric drive cylinder 23 has a gripping mechanism.

[0050] When the electric drive cylinder 23 is activated, it pushes the drive crossbar 22, which in turn moves the power generation unit 202. The movement of the power generation unit 202 simultaneously operates the front link assembly 20 and the rear link assembly 21. The front link assembly 20 drives the front panel 16 to unfold, and the rear link assembly 21 drives the back plate 10 to unfold. The specific unfolding process of the front link assembly 20 has been described above and will not be explained again here. The operation process of the rear link assembly 21 is as follows. The power generation unit 202 rotates the drive end 2110 clockwise by pulling the connecting rod 13, and the execution end 2111 rotates clockwise around the rotation axis, further driving the back plate 10 to rotate. A back drive tube is fixed inside the back plate 10, and the back drive tube is fixed after being inserted and connected to the execution end 2111 of the rear lever 211, making it easy to install the back plate 10.

[0051] The drive end 2110, the rotating shaft 2112, and the operating end 2111 form a triangular structure. When the operating end 2111 raises the back plate 10, the rotating shaft 2112 is positioned forward, and both the drive end 2110 and the operating end 2111 are positioned towards the rear. The stroke of the drive end 2110 extends from the rear end to one end of the rotating shaft 2112 facing the front panel 16. This longer stroke allows for a greater unfolding angle of the back plate 10.

[0052] The middle portion of the power generation unit 202 is bent toward the back plate 10, dividing the power generation unit 202 into two integrally connected upper and lower parts, namely the interlocking arm 2000 and the crossing rod 2021. The interlocking arm 2000 is pivotally attached to the front fixing block 203, and the crossing rod 2021 is pivotally attached to the push rod 2011. Due to the bending of the power generation unit 202, the interlocking arm 2000 tilts toward the back plate 10 when contracted, and further increases the stroke of the interlocking rod 210 during the operation process of the power generation unit 202. Conversely, if the power generation unit 202 were installed straight without bending, the connection position between the interlocking rod 210 and the power generation unit 202 would be located further forward. In this way, the stroke of the front end of the interlocking rod 210 would become very small, and when moving the drive end 2110, the unfolding angle of the back plate 10 would be insufficient due to insufficient stroke.

[0053] By bending the power generation unit 202 and tilting the interlocking arm 2000 toward the back plate 10, the deployment angle of the back plate 10 during the deployment process can be increased.

[0054] In this embodiment, the interlocking arm 2000 is further positioned parallel to the drive end 2110, so that the connection lines between the interlocking arm 2000, the drive end 2110, the interlocking rod 210, and the front fixing block 203 and the rear fixing block 212 form a parallelogram. Although the parallelogram is not necessary, its purpose is to reduce interference with the front link assembly 20 when the cylinder drives the drive crossbar 22 and to facilitate the adjustment of the length and angle of each rod in the front link assembly 20. At the same time, the parallelogram arrangement can further enhance the stability of the interlocking rod 210 during its operation.

[0055] In terms of the specific implementation process, when the drive cylinder 23 is activated, the output end of the drive cylinder 23 moves the drive crossbar 22 forward. The drive crossbar 22 synchronously operates two force generating units 202, and the force generating units 202 rotate around a pivot point with the front fixed block 203. The crossing rod 2021 of the force generating unit 202 pushes the push rod 2011 of the main support unit 201, causing the main support unit 201 to rotate around the intersection 7, and simultaneously the crossing rod 2021 also rotates around the intersection 7. Due to the connection action at the intersection 7, the front fixed block 203, the main support unit 201, the force generating unit 202, and the crossing rod 2021 form a rectangular structure at the intersection 7, and as the force generating unit 202 pushes out, the intersection 7 moves diagonally upward in the direction of the panel rod 2013. The drive arm 2023 of the main support 201 lifts the panel rod 2013, and the lower link 2012 also moves with the panel rod 2013, controlling the posture of the panel rod 2013 by adjusting the angle between the drive arm 2023 and the push rod 2011, and the length between the main support 201 and the lower link 2012. In the extended state, the angle of the panel rod 2013 with respect to the horizontal is 5°, providing comfortable support to the user's legs. In the retracted state, the panel rod 2013 is in a vertical position, storing the front panel 16 at the front of the bottom of the sofa seat.

[0056] Simultaneously, the power generation unit 202 operates the interlocking rod 210, which pushes the drive end 2110 of the rear lever 211. The rear lever 211 rotates around the rotation axis 2112 fixed to the rear fixing block 212, and the execution end 2111 rotates the back plate 10. The back drive tube inside the back plate 10 is inserted into and fixed to the execution end 2111 of the rear lever 211, enabling the back plate 10 to unfold and stand upright. The middle part of the power generation unit 202 bends toward the back plate 10, and the interlocking arm 2000 tilts toward the back plate 10 in its retracted state, increasing the stroke of the interlocking rod 210 and allowing the back plate 10 to unfold to a larger angle. Furthermore, the interlocking arm 2000 and the drive end 2110 are parallel, and the connection lines between the interlocking arm 2000, the drive end 2110, the interlocking rod 210, and the front fixing block 203 and the rear fixing block 212 form a parallelogram structure, thereby reducing interference with the front link assembly 20 when the drive crossbar 22 is in operation, making the operation of the interlocking rod 210 more stable, and ensuring that the front panel 16 and back panel 10 of the sofa extend and retract synchronously and stably.

[0057] The terminology used in this invention is intended solely to describe specific embodiments and is not intended to limit the invention. The singular forms “one,” “the said,” and “the said” as used in this invention and the appended utility model claims also include the plural forms unless the context clearly indicates otherwise. Furthermore, the term “and / or” as used herein should be understood to refer to any or all possible combinations of one or more related listed items.

[0058] This invention may use terms such as "first," "second," and "third" to describe various types of information, but it should be understood that this information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the word "if" used herein may be interpreted as "when," "in the case of," or "in response to a confirmed fact."

[0059] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and ideas of the present invention, and the technical scope of the present invention is limited by the appended claims and their equivalents. [Explanation of Symbols]

[0060] 100 sofas 1. Sofa base frame 10 back plate 11 Seat board 12 Side panels 13 connecting rods 16 Front Panel 2. Interlocking mechanism 20 Front Link Assembly 201 Main support part 2012 See link below 2011 Extrusion Rod 2013 Panel Rod 202 Power generation part 2021 Crossed Rod 2022 Power Rod 2000 Interlocking Arm 2001 Power Arm 2023 Drive Arm 203 Front fixed block 21 Rear Link Assembly 210 Interlocking Rod 211 Rear lever 2110 Drive end 2111 Execution terminal 2112 Rotating shaft 212 Rear fixing block 22 Drive Crossbar 23 Electrically driven cylinder 7 Intersections

Claims

1. An interlocking mechanism for a sofa, comprising a base frame (1), a back panel (10) and a front panel (16) connected to the base frame (1), to enable the sofa to have an extended state and a retracted state, The aforementioned interlocking mechanism (2) is A front link assembly (20) for controlling the front panel (16) to rotate outward from the front of the sofa base frame (1) to support the legs, comprising a force generating unit (202), a main support unit (201), and a front fixing block (203) fixed to the side of the sofa base frame (1), wherein one end of the force generating unit (202) is pivotally attached to the sofa base frame (1) via the front fixing block (203), and the other end is pivotally attached to the main support unit (201), and the main support unit (201) is a front link assembly (20) that abuts against the inside of the front panel (16), The sofa includes a rear link assembly (21) for controlling the back panel (10) to rotate relative to the sofa base frame (1), The rear link assembly (21) includes a linkage rod (210), a rear lever (211), and a rear fixing block (212) fixed to the side of the sofa base frame (1). The rear lever (211) is connected to the back plate (10), and the rear lever (211) is pivotally attached to the sofa base frame (1) via the rear fixing block (212). The rear lever (211) is pivotally attached to one end of the interlocking rod (210), and the other end of the interlocking rod (210) is pivotally attached to the force generating unit (202), thereby interlocking the front link assembly (20) and the rear link assembly (21). An interlocking mechanism characterized by the following:

2. A folding sofa equipped with the interlocking mechanism described in claim 1, The main support section (201) includes a lower link (2012), an extrusion rod (2011), and a panel rod (2013), the front free ends of the lower link (2012) and the extrusion rod (2011) are each pivotally attached to a panel rod (2013), and the panel rod (2013) is provided inside the front panel (16). The power generation unit (202) comprises a crossing rod (2021) and a power generation rod (2022), The upper free end of the crossing rod (2021) is pivotally attached to the front fixed block (203), and the rear free ends of the push rod (2011) and the lower link (2012) are connected to the crossing rod (2021), thereby linking the push rod (2011), the lower link (2012), and the panel rod (2013) to the crossing rod (2021). The power generation rod (2022) includes an interlocking arm (2000) and a power generation arm (2001) integrally molded at a predetermined angle to each other, the upper free end of the interlocking arm (2000) being pivotally attached to the front fixing block (203), and the lower free end of the power generation arm (2001) being pivotally attached to the middle part of the crossing rod (2021). A folding sofa characterized by its features.

3. The predetermined angle is between 100 and 150 degrees. The folding sofa according to feature 2.

4. The power-generating rod (2022) further comprises a drive arm (2023), the drive arm (2023) having one end pivotally attached to the end of the power-generating arm (2001) and the other end pivotally attached to the crossing rod (2021), and is used to reduce the relative displacement between the interlocking arm (2000) and the power-generating arm (2001) and to raise the raised position of the panel rod (2013). The folding sofa according to feature 2.

5. The interlocking rod (210) is pivotally attached to the power generating arm (2001). The folding sofa according to feature 4.

6. The aforementioned interlocking mechanism (2) is A drive crossbar (22) is connected between the two power-generating arms (2001), The sofa base frame (1) is provided between the left and right side walls (12) and further comprises a connecting rod (13) parallel to the drive crossbar (22). The two front fixing blocks (203) are each fixed correspondingly between the side walls (12), and the two rear fixing blocks (212) are each fixed correspondingly between the side walls (12). A folding sofa according to any one of claims 2 to 5.

7. The structure of the rear lever (211) includes a rotating shaft (2112), a drive end (2110), and an operating end (2111), the rotating shaft (2112) being connected to the back plate (10), The execution end (2111) is rotatably connected to the interlocking rod (210), and the drive end (2110) is rotatably connected to the rear fixing block (212). When the back plate (10) is pushed by an external force to rotate relative to the sofa base frame (1), the rotating shaft (2112) is driven to rotate synchronously, and the rotating shaft (2112) interlocks the drive end (2110) and the execution end (2111), thereby transmitting the pushing force from the rear lever (211) to the interlocking rod (210). The folding sofa according to feature 6.

8. The electric drive cylinder (23) is further equipped, The electric drive cylinder (23) is provided between the drive crossbar (22) and the connecting rod (13), and the electric drive cylinder (23) causes the drive crossbar (22) and the connecting rod to move away from or closer to each other, thereby driving the back panel and the front panel to unfold or fold relative to the sofa base frame. The folding sofa according to feature 7.

9. The extension end of the electric drive cylinder (23) has a gripping mechanism (24), The gripping mechanism (24) comprises a pivot shaft (242) connected to the extension and retraction end of the electric drive cylinder (23), and a gripper (243) connected to the pivot shaft (242). The gripper (243) is connected to the drive crossbar (22), and the gripping mechanism adjusts the extension and retraction direction of the electric drive cylinder (23) to match the drive crossbar (22). The folding sofa according to feature 8.

10. A multifunctional sofa having an extended state and a retracted state, comprising a sofa base frame (1), a front panel (16) connected to the front side of the sofa base frame, and a back panel (10) connected to the rear upper side of the sofa base frame, further comprising an interlocking mechanism (2) for extending or folding the back panel and the front panel relative to the sofa base frame, The aforementioned interlocking mechanism (2) is A front link assembly (20) for controlling the front panel (16) to rotate outward from the front of the sofa base frame (1) to support the legs, comprising a force generating unit (202), a main support unit (201), and a front fixing block (203) fixed to the side of the sofa base frame (1), wherein one end of the force generating unit (202) is pivotally attached to the sofa base frame (1) via the front fixing block (203), and the other end is pivotally attached to the main support unit (201), and the main support unit (201) is a front link assembly (20) that abuts against the inside of the front panel (16), The sofa includes a rear link assembly (21) for controlling the back panel (10) to rotate relative to the sofa base frame (1), The rear link assembly (21) includes a linkage rod (210), a rear lever (211), and a rear fixing block (212) fixed to the side of the sofa base frame (1). The rear lever (211) is connected to the back plate (10), and the rear lever (211) is pivotally attached to the sofa base frame (1) via the rear fixing block (212). The rear lever (211) is pivotally attached to one end of the interlocking rod (210), and the other end of the interlocking rod (210) is pivotally attached to the force generating unit (202), thereby interlocking the front link assembly (20) and the rear link assembly (21). A multi-functional sofa characterized by its features.

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