Anti-toppling splicing mechanism for sofa

Abstract

The utility model discloses a sofa anti-toppling splicing mechanism, which comprises a first sofa unit and a second sofa unit, the side walls of the first sofa unit and the second sofa unit are connected through at least two groups of front and back plug-in components, each group of plug-in components comprises a pair of plug-in sheets which are opposite to each other up and down, the plug-in sheets are plates with convex middle parts, and the plug-in sheets are inserted into the first sofa unit and the second sofa unit. Comprising fixing parts used for being connected with a first sofa unit or a second sofa unit on the two sides and protruding parts protruding outwards relative to the fixing parts, transition parts are formed at the joint positions between the protruding parts and the fixing parts, and inserting grooves are formed in the areas defined by the protruding parts and the transition parts on the two sides. One of the upper and lower ends of the lug boss extends to form an inserting part; the inserting assembly located on the rear side is obliquely arranged, so that when the first sofa unit or the second sofa unit tends to topple forwards, the two inserting pieces of the inserting assembly located on the rear side tend to move relatively in the vertical direction, the inserting parts abut against the transition parts, and the first sofa unit and the second sofa unit keep relatively fixed.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a sofa anti-tipping splicing mechanism. Background Technology

[0002] Sofas are common soft furnishings, typically placed in family living rooms and office reception areas. Sofas feature multiple cushioned seats and backrests, providing a soft and comfortable experience whether the user is sitting upright or reclining, making them popular with consumers. Most existing sofas are modular, meaning they are composed of multiple multi-functional sofa units assembled together. Modular sofas are not only easy to disassemble, pack, and transport, but users can also choose the arrangement of the sofas according to the size of the space, making them very convenient to use.

[0003] To facilitate user assembly, existing modular sofas typically use plug-in components to combine multiple multi-functional sofas. The plug-in components include plugs and fasteners. The plugs have vertical protrusions, and the fasteners have corresponding recesses forming slots. Two sets of plug-in components are set between two adjacent multi-functional sofas. During installation, you only need to lift one side of the multi-functional sofa, align the top and bottom plugs with the slots, and snap them in to fix the two multi-functional sofas together horizontally, making assembly relatively convenient.

[0004] However, the above solution has the following problems: Some existing modular sofas, especially the multi-functional sofas, have a tilt adjustment function, such as the attached... Figure 11 As shown, a metal mechanical extension device 140 for supporting sofa movement is installed below the sofa's base frame. This device includes a seat cushion assembly 110, a backrest assembly 120, and a footrest assembly 130. In the upright sitting position, the backrest assembly 120 and seat cushion assembly 110 are nearly vertical, and the footrest assembly 130 is vertical and connected to the lower edge of the seat cushion assembly 110, allowing the user to sit upright. In the reclining position, the mechanical extension device 140 drives the footrest assembly 130 to extend forward to the front of the seat cushion assembly 110, lifting the user's feet. Simultaneously, it drives the backrest assembly 120 to tilt backward, allowing the user to lie flat on the sofa. However, in the reclining position, when the user wants to get up from the sofa, the increased pressure on the seat cushion assembly 110 and footrest assembly 130 causes the sofa's center of gravity to shift forward, making the rear end of the sofa prone to tilting upward and the suspended footrest assembly 130 prone to tilting downward, meaning the sofa has a tendency to tilt forward. If the above-mentioned plug-in components are used, when the sofa tends to lean forward, the plug on the back side is prone to coming out of the slot, causing the sofa to lean forward and resulting in poor stability. Additional fixing components are needed to fix the two multi-functional sofas in the vertical direction, which is costly and more troublesome to assemble. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a sofa anti-tipping splicing mechanism. By tilting the rear plug-in component, the tilted rear plug-in part abuts against the upper transition part in the vertical direction, thereby fixing the two rear plugs relatively in the vertical direction. The first sofa unit and the second sofa unit can also remain relatively fixed. The sofa can be prevented from tipping over by plugs alone. The structure is simple, the cost is low, and the stability is good.

[0006] The effect of this utility model is achieved as follows:

[0007] In a first aspect, this application provides a sofa anti-tipping splicing mechanism, including a first sofa unit and a second sofa unit. The side walls of the first sofa unit and the second sofa unit are connected by at least two sets of front and rear plug-in components. Each set of plug-in components includes a pair of upper and lower opposing inserts. The insert is a plate with a central protrusion, including a fixing part on both sides for connecting the first sofa unit or the second sofa unit, and a protrusion that protrudes outward relative to the fixing part. The part connecting the protrusion and the fixing part forms a transition part. The area enclosed between the protrusion and the two side transition parts forms a plug-in groove. One end of the upper and lower ends of the protrusion extends to form a plug-in part. When the plug-in parts and plug-in grooves of the upper and lower opposing inserts are plugged into each other and fixed, the first sofa unit and the second sofa unit are fixed relative to each other in the horizontal direction.

[0008] The rear-mounted plug assembly is tilted so that when the first or second sofa unit tends to tilt forward, the two inserts of the rear-mounted plug assembly tend to move relative to each other in the vertical direction. The plug part abuts against the upper transition part, so that the two inserts remain relatively fixed, thereby keeping the first and second sofa units relatively fixed.

[0009] Furthermore, the rear-mounted connector is tilted from front to back and from high to low, making the assembly of the first and second sofa units easier.

[0010] Furthermore, the angle of inclination of the rear plug-in assembly relative to the vertical plane is 15-35°. This not only ensures that the two rear plugs are relatively fixed in the vertical direction, preventing the sofa from tilting forward, but also makes it easy to align and plug the two rear plugs together during sofa assembly.

[0011] Furthermore, the insertion part is inclined away from the fixing part. When the two opposite inserts are inserted and fixed, the two insertion parts are guided by the inclined surface to slide into the insertion groove, further improving the ease of sofa assembly.

[0012] Furthermore, the inclination angle of the plug portion relative to the protrusion portion is 5-30°. This not only facilitates the positioning of the two plug portions during assembly, but also ensures that the width of the plug portion is similar to the width of the plug groove, allowing the plug portion to stably engage with the plug groove, resulting in higher connection strength of the plug assembly.

[0013] Secondly, this application provides a sofa anti-tipping splicing mechanism, including a first sofa unit and a second sofa unit. The side walls of the first sofa unit and the second sofa unit are connected by at least two sets of snap-fit ​​components. Each set of snap-fit ​​components includes a support plate and a snap-fit ​​member. The support plate is a plate with a central protrusion, including connecting parts on both sides for connecting the first sofa unit, and positioning parts that protrude outward relative to the connecting parts. The positioning parts are hollowed out with snap-fit ​​grooves. The upper side of the snap-fit ​​grooves is open. The snap-fit ​​member is connected to the second sofa unit, and the snap-fit ​​member is snapped into the snap-fit ​​groove through the upper side of the snap-fit ​​groove.

[0014] The lower side of the snap-fit ​​groove extends horizontally, causing the snap-fit ​​component to tend to move upward relative to the support plate when the first or second sofa unit tends to tilt forward. Both the upper and lower ends of the snap-fit ​​component abut against the groove wall, keeping the snap-fit ​​component and the support plate relatively fixed, thereby keeping the first and second sofa units relatively fixed. The snap-fit ​​component can be inserted into the snap-fit ​​groove from the opening, making sofa assembly easier. Furthermore, by extending the lower side of the snap-fit ​​groove horizontally, the snap-fit ​​component and the support plate are relatively fixed in the vertical direction, effectively preventing the sofa from tilting forward and providing good stability.

[0015] Furthermore, the snap-fit ​​groove is an arc-shaped groove. This allows the snap-fit ​​component to slide along the arc surface of the snap-fit ​​groove into the bottom of the groove when assembling the second sofa unit and the first sofa unit, further improving the ease of sofa assembly.

[0016] Furthermore, the height of the locking groove gradually decreases from front to back. The upper and rear sides of the locking piece abut against the groove wall, effectively preventing the locking piece from detaching from the groove, preventing the sofa from tilting forward, and further improving the stability of the sofa.

[0017] Furthermore, the snap-fit ​​component includes an outer limiting portion and an inner sliding portion. The sliding portion can slide along the snap-fit ​​groove, and the diameter of the limiting portion is larger than that of the snap-fit ​​groove, so that the limiting portion is clamped between the positioning portion and the first sofa unit. This makes the snap-fit ​​component and the support plate relatively fixed in the horizontal direction, further improving the connection strength between the snap-fit ​​component and the support plate and enhancing the stability of the sofa.

[0018] Furthermore, the snap-fit ​​component has a hollowed-out connection hole in the middle, configured for a screw to pass through and screw the snap-fit ​​component to the second sofa unit. Fixing the snap-fit ​​component and the second sofa unit with screws not only ensures a high connection strength between the two units but also simplifies the installation and removal of the snap-fit ​​component.

[0019] The sofa anti-tipping assembly mechanism provided in this application tilts the rear plug-in component, with the tilted rear plug-in portion abutting against the transition portion in the vertical direction. This fixes the two rear plug pieces relatively in the vertical direction. When the first or second sofa unit tends to tilt forward, the two rear plug pieces remain relatively fixed, and the first and second sofa units also remain relatively fixed. Therefore, the sofa can be prevented from tipping over using only the plug pieces; the structure is simple, inexpensive, and offers good stability. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a three-dimensional structural diagram of the sofa provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the connection structure between the first sofa unit and the second sofa unit provided in an embodiment of this application;

[0023] Figure 3 This is a schematic diagram illustrating the assembly process between plug-in components provided in the embodiments of this application;

[0024] Figure 4 This is a schematic cross-sectional view of the interlocking components provided in the embodiments of this application;

[0025] Figure 5 A schematic diagram illustrating the assembly process between the first sofa unit and the second sofa unit provided in an embodiment of this application;

[0026] Figure 6 A three-dimensional structural diagram of the snap-fit ​​assembly located on the rear side of the sofa, provided in an embodiment of this application;

[0027] Figure 7 This is a three-dimensional structural diagram of the snap-fit ​​assembly provided in the embodiments of this application;

[0028] Figure 8 This is a schematic diagram illustrating the assembly process of the snap-fit ​​component provided in the embodiments of this application;

[0029] Figure 9This is a schematic diagram of the connection structure between the first sofa unit and the second sofa unit when using a snap-fit ​​assembly, as provided in an embodiment of this application.

[0030] Figure 10 This is a schematic diagram illustrating the assembly process between the first sofa unit and the second sofa unit when using a snap-fit ​​assembly, as provided in an embodiment of this application.

[0031] Figure 11 This is a schematic diagram illustrating the process of a sofa switching between a sitting position and a lying position in the prior art, as provided in the embodiments of this application.

[0032] The reference numerals in the attached drawings are as follows: 1a-first sofa unit, 1b-second sofa unit, 110-seat cushion assembly, 120-backrest assembly, 130-footrest assembly, 140-mechanical extension device, 2-insertion piece, 210-fixing part, 220-protrusion, 221-insertion groove, 230-insertion part, 240-transition part, 3-support plate, 4-snap fastener, 401-connection hole, 310-connection part, 320-positioning part, 321-snap fastener groove, 410-limiting part, 420-sliding part. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0034] Please refer to the attached document. Figure 1-6 This application provides a sofa anti-tipping splicing mechanism, including a first sofa unit 1a and a second sofa unit 1b. The side walls of the first sofa unit 1a and the second sofa unit 1b are connected by at least two sets of front and rear plug-in components. Each set of plug-in components includes a pair of upper and lower opposite plug pieces 2. The plug piece 2 is a plate with a central protrusion, including a fixing part 210 on both sides for connecting the first sofa unit 1a or the second sofa unit 1b, and a protrusion 220 protruding outward relative to the fixing part 210. The part connecting the protrusion 220 and the fixing part 210 forms a transition part 240. The area enclosed between the protrusion 220 and the two side transition parts 240 forms a plug-in groove 221. One end of the upper and lower ends of the protrusion 220 extends to form a plug-in part 230. When the plug-in part 230 and the plug-in groove 221 of the upper and lower opposite plug pieces 2 are plugged into each other and fixed, the first sofa unit 1a and the second sofa unit 1b are fixed relative to each other in the horizontal direction.

[0035] The rear-mounted plug assembly is tilted so that when the first sofa unit 1a or the second sofa unit 1b tends to tilt forward, the two inserts 2 of the rear-mounted plug assembly tend to move relative to each other in the vertical direction. The plug portion 230 abuts against the upper transition portion 240, so that the two inserts 2 remain relatively fixed, thereby keeping the first sofa unit 1a and the second sofa unit 1b relatively fixed.

[0036] In this embodiment, the rear plug-in assembly is tilted, as shown in the attached figure. Figure 6 As shown, the rear-sloping insertion portion 230 abuts against the transition portion 240 in the vertical direction, thereby fixing the two rear inserts 2 relatively in the vertical direction. When the first sofa unit 1a or the second sofa unit 1b tends to tilt forward, the two rear inserts 2 remain relatively fixed, and the first sofa unit 1a and the second sofa unit 1b also remain relatively fixed. Thus, the sofa can be prevented from tilting by the inserts 2 alone, resulting in a simple structure, low cost, and good stability.

[0037] The insert 2 is made by cutting a metal plate and bending the middle part. The transition part 240 is inclined relative to the fixed part 210 and the protrusion 220, which makes the manufacturing cost of the insert 2 lower and the insert 2 is integrally formed, with good strength.

[0038] Preferably, the fixing part 210 and the first sofa unit 1a or the second sofa unit 1b are fixed by screws, which makes the installation and disassembly of the insert 2 more convenient and the connection strength is higher.

[0039] Please refer to the attached document. Figure 2 and attached Figure 5 In some embodiments of this application, the tilt direction of the rear plug-in assembly is from front to back and from high to low.

[0040] In this embodiment, preferably, the insertion portion 230 of the insert 2 on the first sofa unit 1a faces upward, and the insertion portion 230 of the insert 2 on the second sofa unit 1b faces downward. By tilting the rear insertion components forward, when assembling the first sofa unit 1a and the second sofa unit 1b, the front end of the second sofa unit 1b is first tilted up and lifted to facilitate the insertion and engagement of the two inserts 2 on the rear side of the second sofa unit 1b and the first sofa unit 1a. Then, the second sofa unit 1b is lowered, and the front end of the second sofa unit 1b moves downward until the two inserts 2 on the front side of the second sofa unit 1b and the second sofa unit 1a are also inserted and engaged, thereby completing the assembly operation of the first sofa unit 1a and the second sofa unit 1b. This makes the assembly operation between the first sofa unit 1a and the second sofa unit 1b relatively simple.

[0041] Please refer to the attached document. Figure 2 and attached Figure 5 In some embodiments of this application, the angle of inclination of the rear plug-in assembly relative to the vertical plane is 15-35°. This not only ensures that the two rear plugs 2 are relatively fixed in the vertical direction, preventing the sofa from tilting forward, but also makes it easy for the two rear plugs 2 to be aligned and plugged in during sofa assembly.

[0042] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the insertion portion 230 is inclined away from the fixing portion 210. This results in a larger gap between the outer side of the insertion portion 230 and the first sofa unit 1a or the second sofa unit 1b. When the two upper and lower opposing inserts 2 are inserted and fixed, the two insertion portions 230 are guided by the inclined surfaces to slide into the insertion groove 221, further improving the ease of sofa assembly.

[0043] Please refer to the attached document. Figure 3-4 In some embodiments of this application, the inclination angle of the plug portion 230 relative to the protrusion 220 is 5-30°. This not only facilitates the positioning of the two plug portions 230 during assembly, but also makes the width of the plug portion 230 similar to the width of the plug groove 221, allowing the plug portion 230 to be stably engaged in the plug groove 221, resulting in higher connection strength of the plug assembly.

[0044] Of course, in this application, the sofa anti-tipping splicing mechanism can also have other structures:

[0045] Please refer to the attached document. Figure 9-10 This application embodiment also provides a sofa anti-tipping splicing mechanism, including a first sofa unit 1a and a second sofa unit 1b. The side walls of the first sofa unit 1a and the second sofa unit 1b are connected by at least two sets of front and rear snap-fit ​​components. Each set of snap-fit ​​components includes a support plate 3 and a snap-fit ​​member 4. The support plate 3 is a plate with a central protrusion, including connecting portions 310 on both sides for connecting the first sofa unit 1a, and positioning portions 320 protruding outward relative to the connecting portions 310. The positioning portions 320 are hollowed out with snap-fit ​​grooves 321. The upper side of the snap-fit ​​grooves 321 is open. The snap-fit ​​member 4 is connected to the second sofa unit 1b, and the snap-fit ​​member 4 is snapped into the snap-fit ​​grooves 321 through the upper side of the snap-fit ​​grooves 321.

[0046] The lower side of the snap-fit ​​groove 321 extends horizontally, so that when the first sofa unit 1a or the second sofa unit 1b has a tendency to tilt forward, the snap-fit ​​member 4 has a tendency to move upward relative to the support plate 3. Both the upper and lower ends of the snap-fit ​​member 4 abut against the groove wall of the snap-fit ​​groove 321, so that the snap-fit ​​member 4 and the support plate 3 remain relatively fixed, thereby keeping the first sofa unit 1a and the second sofa unit 1b relatively fixed.

[0047] In this embodiment, when assembling the sofa, it is only necessary to lift the second sofa unit 1b, align the snap-fit ​​4 with the opening on the upper side of the snap-fit ​​groove 321 on the first sofa unit 1a, and then put the second sofa unit 1b down. The snap-fit ​​4 can then snap into the snap-fit ​​groove 321 from the opening, completing the assembly operation of the first sofa unit 1a and the second sofa unit 1b, making the sofa assembly operation relatively simple. Furthermore, by extending the lower side of the snap-fit ​​groove 321 in the horizontal direction, after the snap-fit ​​4 snaps into the bottom of the snap-fit ​​groove 321, the snap-fit ​​4 and the support plate 3 are relatively fixed in the vertical direction, effectively preventing the sofa from tilting forward and providing good stability.

[0048] Please refer to the attached document. Figure 8 In some embodiments of this application, the snap-fit ​​groove 321 is an arc-shaped groove. This allows the snap-fit ​​component 4 to slide along the arc surface of the snap-fit ​​groove 321 into the bottom of the snap-fit ​​groove 321 when the second sofa unit 1b and the first sofa unit 1a are assembled, further improving the ease of sofa assembly.

[0049] Of course, in other embodiments of this application, the snap-fit ​​groove 321 can also be a bent L-shaped groove. After the snap-fit ​​member 4 slides down into the bottom of the snap-fit ​​groove 321, it pushes the second sofa unit 1b in the horizontal direction so that the snap-fit ​​member 4 snaps into the horizontal part of the snap-fit ​​groove 321, thereby fixing the first sofa unit 1a and the second sofa unit 1b.

[0050] Please refer to the attached document. Figure 10 In some embodiments of this application, the height of the locking groove 321 gradually decreases from front to back. That is, the arc surface of the locking groove 321 extends from front to back. When the second sofa unit 1b has a tendency to tilt forward, the locking member 4 has a tendency to move backward and upward relative to the support plate 3. The upper and rear sides of the locking member 4 abut against the groove wall of the locking groove 321, thereby effectively preventing the locking member 4 from disengaging from the locking groove 321, preventing the sofa from tilting forward, and further improving the stability of the sofa.

[0051] Please refer to the attached document. Figure 7-8 In some embodiments of this application, the snap-fit ​​member 4 includes an outer limiting portion 410 and an inner sliding portion 420. The sliding portion 420 can slide along the snap-fit ​​groove 321. The diameter of the limiting portion 410 is larger than that of the snap-fit ​​groove 321, so that the limiting portion 410 is clamped between the positioning portion 320 and the first sofa unit 1a. This fixes the snap-fit ​​member 4 and the support plate 3 relatively in the horizontal direction, further improving the connection strength between the snap-fit ​​member 4 and the support plate 3 and enhancing the stability of the sofa.

[0052] Please refer to the attached document. Figure 7-8In some embodiments of this application, the snap-fit ​​component 4 has a hollowed-out connection hole 401 in the middle, which is configured to allow screws to pass through and screw the snap-fit ​​component 4 to the second sofa unit 1b. Fixing the snap-fit ​​component 4 and the second sofa unit 1b by screw connection not only ensures a high connection strength between the snap-fit ​​component 4 and the second sofa unit 1b, but also simplifies the installation and removal of the snap-fit ​​component 4.

[0053] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0054] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A sofa anti-tipping splicing mechanism, characterized in that, The sofa includes a first sofa unit (1a) and a second sofa unit (1b). The sidewalls of the first sofa unit (1a) and the second sofa unit (1b) are connected by at least two sets of front and rear plug-in components. Each set of plug-in components includes a pair of upper and lower opposing inserts (2). The inserts (2) are plates with a central protrusion, including fixing portions (210) on both sides for connecting the first sofa unit (1a) or the second sofa unit (1b), and protrusions (220) protruding outward relative to the fixing portions (210). The portion connecting the protrusion (220) and the fixing portion (210) forms a transition portion (240), and the area enclosed between the protrusion (220) and the two side transition portions (240) forms a insertion groove (221). One end of the protrusion (220) extends to form an insertion portion (230). When the insertion portions (230) and insertion grooves (221) of the upper and lower opposite inserts (2) are inserted and fixed to each other, the first sofa unit (1a) and the second sofa unit (1b) are fixed to each other in the horizontal direction. The plug-in assembly located on the rear side is tilted so that when the first sofa unit (1a) or the second sofa unit (1b) has a tendency to tilt forward, the two inserts (2) of the plug-in assembly on the rear side have a tendency to move relative to each other in the vertical direction. The plug-in part (230) abuts against the transition part (240) on the upper side, so that the two inserts (2) remain relatively fixed, thereby keeping the first sofa unit (1a) and the second sofa unit (1b) relatively fixed.

2. The sofa anti-tipping splicing mechanism according to claim 1, characterized in that, The plug-in assembly located on the rear side is tilted from front to back and from high to low.

3. The sofa anti-tipping splicing mechanism according to claim 1, characterized in that, The rear-mounted plug assembly is tilted at an angle of 15-35° relative to the vertical plane.

4. The sofa anti-tipping splicing mechanism according to claim 1, characterized in that, The plug portion (230) is inclined away from the fixing portion (210).

5. The sofa anti-tipping splicing mechanism according to claim 4, characterized in that, The angle of inclination of the plug portion (230) relative to the protrusion portion (220) is 5-30°.

6. A sofa anti-tipping splicing mechanism, characterized in that, The sofa includes a first sofa unit (1a) and a second sofa unit (1b). The side walls of the first sofa unit (1a) and the second sofa unit (1b) are connected by at least two sets of snap-fit ​​components. Each set of snap-fit ​​components includes a support plate (3) and a snap-fit ​​component (4). The support plate (3) is a plate with a central protrusion. It includes connecting portions (310) on both sides for connecting the first sofa unit (1a) and positioning portions (320) that protrude outward relative to the connecting portions (310). The positioning portions (320) are hollowed out with snap-fit ​​grooves (321). The upper side of the snap-fit ​​grooves (321) is open. The snap-fit ​​component (4) is connected to the second sofa unit (1b), and the snap-fit ​​component (4) is snapped into the snap-fit ​​grooves (321) through the upper side of the snap-fit ​​grooves (321). The lower side of the snap-fit ​​groove (321) extends horizontally, so that when the first sofa unit (1a) or the second sofa unit (1b) has a tendency to tilt forward, the snap-fit ​​member (4) has a tendency to move upward relative to the support plate (3). Both the upper and lower ends of the snap-fit ​​member (4) abut against the groove wall of the snap-fit ​​groove (321), so that the snap-fit ​​member (4) and the support plate (3) remain relatively fixed, thereby keeping the first sofa unit (1a) and the second sofa unit (1b) relatively fixed.

7. The sofa anti-tipping splicing mechanism according to claim 6, characterized in that, The snap-fit ​​groove (321) is an arc-shaped groove.

8. The sofa anti-tipping splicing mechanism according to claim 7, characterized in that, From front to back, the height of the snap-fit ​​groove (321) gradually decreases.

9. The sofa anti-tipping splicing mechanism according to claim 6, characterized in that, The snap-fit ​​component (4) includes an outer limiting part (410) and an inner sliding part (420). The sliding part (420) can slide along the snap-fit ​​groove (321). The diameter of the limiting part (410) is larger than that of the snap-fit ​​groove (321), so that the limiting part (410) is clamped between the positioning part (320) and the first sofa unit (1a).

10. The sofa anti-tipping splicing mechanism according to claim 6, characterized in that, The snap-fit ​​component (4) has a hollowed-out connection hole (401) in the middle, which is configured to allow screws to pass through and screw the snap-fit ​​component (4) to the second sofa unit (1b).

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