Self-locking mechanism applied to folding sofa

Abstract

The utility model discloses a self-locking mechanism applied to a folding sofa. The self-locking mechanism comprises a connecting rod assembly, a self-locking rivet and a limiting rotating rod. One end of the connecting rod assembly is pivoted to the front sofa cushion, and the other end is pivoted to the fixed underframe of the sofa frame. And the front sofa cushion is linked through the connecting rod assembly to be folded and stored on the rear sofa cushion in the sofa frame or unfolded on one side of the rear sofa cushion. The self-locking rivet is arranged on the connecting rod assembly. And the limiting rotating rod is movably arranged on the front sofa cushion. And an arc-shaped hook corresponding to the self-locking rivet is arranged at one end of the limiting rotating rod. When the front sofa cushion is unfolded on one side of the rear sofa cushion, the connecting rod assembly drives the self-locking rivet to slide into the arc-shaped hook through an opening of the arc-shaped hook, and the limiting rotating rod is matched with the self-locking rivet to prevent the connecting rod assembly from rotating, so that the sofa bed is locked, and the situation that the front sofa cushion is folded due to the fact that the rear sofa cushion bears too large load is prevented; and the product safety is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of bedding, and particularly to a self-locking mechanism applied to a folding sofa. Background Art

[0002] Modern living room layouts advocate simplicity. With the accelerating social development and the continuous increase in population, the limited nature of living space has become more obvious, and multifunctional furniture has increasingly become the choice of the public. The sofa bed is one of them. In small-sized apartments, a sofa bed is necessary to meet the occasional accommodation needs of visitors. Usually, the sofa bed can be placed in the living room or study to serve as a seat. At night when guests arrive, the sofa bed is unfolded and covered with bedding to become a sleeping bed. In ordinary housing types such as three-bedroom and two-living-room apartments, the sofa bed can also help the host deal with the occasional visit of multiple guests in addition to the guest bedroom bed. There are various sofa beds on the market now, and the conversion methods between the sofa and the bed are also diverse, such as folding, flipping, and stretching. These sofa beds use various connection mechanisms, which are mostly time-consuming and laborious during conversion, not very convenient to use, and there is no locking structure between the sofa and the bed, which easily causes the problem of unstable unfolding of the sofa bed. Summary of the Utility Model

[0003] In order to solve the above technical problems, the embodiments of this application provide a self-locking mechanism applied to a folding sofa. The specific technical solutions are as follows:

[0004] A self-locking mechanism applied to a folding sofa is provided, which includes a connecting rod assembly, a self-locking rivet, and a limiting rotating rod. One end of the connecting rod assembly is pivotally connected to the front sofa cushion, and the other end is pivotally connected to the fixed bottom frame of the sofa frame. The front sofa cushion is folded and stored on the rear sofa cushion inside the sofa frame or unfolded on one side of the rear sofa cushion through the linkage of the connecting rod assembly. The self-locking rivet is arranged on the connecting rod assembly. The limiting rotating rod is movably arranged on the front sofa cushion. An arc-shaped hook corresponding to the self-locking rivet is arranged at one end of the limiting rotating rod. When the front sofa cushion is unfolded on one side of the rear sofa cushion, the connecting rod assembly drives the self-locking rivet to slide into the arc-shaped hook through the opening of the arc-shaped hook, and the limiting rotating rod cooperates with the self-locking rivet to prevent the connecting rod assembly from rotating.

[0005] In one embodiment, the link assembly includes a first link and a second link. The first link has a first link segment. One end of the first link segment is pivotally connected to the lower side of the front sofa cushion, and the other end is pivotally connected to the fixed chassis. The second link has a second link segment and a third link segment provided at one end of the second link segment. The second link segment corresponds to and is parallel to the first link segment. One end of the second link segment is pivotally connected to the lower side of the front sofa cushion. The connecting end of the second link segment and the third link segment is pivotally connected to the fixed chassis. The third link segment is pivotally connected to the lower side of the rear sofa cushion. When the front sofa cushion is folded and stored on the rear sofa cushion or unfolded on one side of the rear sofa cushion through the link assembly, the third link segment drives the rear sofa cushion to descend or ascend.

[0006] In one embodiment, it further includes: a first elastic member, one end of which is pivotally connected to the fixed chassis. The first link further has a fourth link segment provided at the pivot end of the first link segment and the fixed chassis. The fourth link segment corresponds to and is parallel to the third link segment. The other end of the first elastic member is pivotally connected to the fourth link segment. When the front sofa cushion is unfolded on one side of the rear sofa cushion, the first elastic member is in a stretched state.

[0007] In one embodiment, a first connecting member is provided on the lower side of the front sofa cushion. The first link segment and the second link segment are pivotally connected to the first connecting member; a second connecting member is provided on the lower side of the rear sofa cushion. The third link segment is pivotally connected to the second connecting member.

[0008] In one embodiment, the limiting rotating rod has an opposite first end, a second end, and a middle section located between the first end and the second end. The arc-shaped hook is located at the first end. The middle section is pivotally connected to the first connecting member. The limiting rotating rod is configured to rotate around its pivotal connection position to slide the self-locking rivet out of the arc-shaped hook.

[0009] In one embodiment, an arc-shaped chute corresponding to the limiting rotating rod is provided on the first connecting member. A rotating dial is provided on the side of the limiting rotating piece. The rotating dial is located in the arc-shaped chute. When the front sofa cushion is unfolded on one side of the rear sofa cushion through the link assembly, the rotating dial abuts against the lower end of the arc-shaped chute. When the rotating dial slides upward along the arc-shaped chute, the rotating dial drives the limiting rotating rod to rotate around its pivotal connection position to slide the self-locking rivet out of the arc-shaped hook.

[0010] In one embodiment, it further includes: a second elastic member, one end of which is connected to the first end of the limiting rotating rod, and the other end is connected to the first connecting member. When the rotating dial slides upward along the arc-shaped chute until it abuts against the upper end of the arc-shaped chute, the second elastic member prevents the limiting rotating rod from rotating back due to its own gravity.

[0011] In one embodiment, when the front sofa cushion is folded and stored in the rear sofa cushion through the linkage assembly, the second connecting rod pushes the rotating paddle to slide downward along the arc-shaped slide groove, and the second elastic member drives the limiting rotating rod to reset.

[0012] In one embodiment, the limiting rotation rod is located between the first connecting rod section and the second connecting rod section, the arc-shaped slide groove is located on the side of the limiting rotation rod close to the second connecting rod section, and the arc center of the arc-shaped slide groove faces the pivot position of the limiting rotation rod, and the second elastic member is connected to one end of the first connecting member close to the arc-shaped slide groove.

[0013] In one embodiment, a support plate is provided on a side of the front sofa cushion away from the rear sofa cushion, and when the front sofa cushion is folded and stored on the rear sofa cushion, the support plate is attached to the outer surface of the sofa frame.

[0014] In the embodiment of the present application, the front sofa cushion is folded and stored on the rear sofa cushion in the sofa frame or unfolded on one side of the rear sofa cushion through the linkage of the connecting rod assembly, so that the sofa bed can be opened or folded in one step, which is easy to operate and has a small structure volume, which can reduce logistics costs. After the front sofa cushion is unfolded, the limit rotation rod cooperates with the self-locking rivet to prevent the rotation of the connecting rod assembly, lock the sofa bed, and prevent the rear sofa cushion from being folded due to excessive load, thereby greatly improving product safety. At the same time, the exposed part of the iron frame mechanism of the self-locking mechanism applied to the folding sofa of the present application has no gap, avoiding various accidental pinching accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 is a three-dimensional diagram of the unfolded state of the folding sofa of the present application;

[0017] Figure 2 It is a three-dimensional diagram of the storage process of the folding sofa of the present application;

[0018] Figure 3 is a three-dimensional diagram of the folding sofa of the present application in the storage state;

[0019] Figure 4 It is a three-dimensional diagram of the self-locking state of the self-locking mechanism of the present application;

[0020] Figure 5 yes Figure 4 Side view of

[0021] Figure 6 is a stereoscopic diagram of the unlocked state of the self-locking mechanism of the present application;

[0022] Figure 7 is Figure 6 a side view;

[0023] Figure 8 is a schematic diagram of the storage process of the self-locking mechanism of this application;

[0024] Figure 9 is a schematic diagram of the storage state of the self-locking mechanism of this application. Specific embodiments

[0025] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0026] In addition, regarding the "first", "second", etc. used in this article, they do not particularly refer to the order or sequence, nor are they used to limit this application. They are only used to distinguish components or operations described with the same technical terms.

[0027] Please refer to Figures 1 to 3 , Figure 1 is a three-dimensional view of the unfolded state of the folding sofa of this application, Figure 2 is a three-dimensional view of the storage process and Figure 3 is a three-dimensional view of the storage state; as shown in the figure, the self-locking mechanism 1 applied to the folding sofa in this embodiment includes a link assembly 2, a self-locking rivet 3, and a limit rotating rod 4. One end of the link assembly 2 is pivotally connected to the front sofa cushion 5. The other end of the link assembly 2 is pivotally connected to the fixed bottom frame 61 of the sofa frame 6. After the front sofa cushion 5 is folded and stored on the rear sofa cushion 7 in the sofa frame 6 through the linkage of the link assembly 2, as Figure 3 shown, the front sofa cushion 5 is stacked on the rear sofa cushion 7. After the front sofa cushion 5 is unfolded on one side of the rear sofa cushion 7 through the linkage of the link assembly 2, as Figure 1 shown, the front sofa cushion 5 is unfolded on the left side of the sofa cushion 7, and the front sofa cushion 5 and the sofa cushion 7 form a mattress.

[0028] Please refer to Figure 4 and Figure 5 and at the same time refer to Figure 1 shown, Figure 4 is a three-dimensional view of the self-locking state of the self-locking mechanism of this application and Figure 5 is Figure 4Side view; as shown in the figure, as described above, the self-locking rivet 3 is disposed on the link assembly 2. The limiting rotating rod 4 is movably disposed below the front sofa cushion 5, and the term "movably disposed" here means that the limiting rotating rod 4 can rotate on the front sofa cushion 5. One end of the limiting rotating rod 4 is provided with an arc-shaped hook 41 corresponding to the self-locking rivet 3. When the front sofa cushion 5 is unfolded on one side of the rear sofa cushion 7, the link assembly 2 drives the self-locking rivet 3 to slide into the arc-shaped hook 41 through the opening of the arc-shaped hook 41, and the limiting rotating rod 4 cooperates with the self-locking rivet 3 to prevent the link assembly 2 from rotating, so as to avoid the front sofa cushion 5 being folded and stored in the fixed chassis 6 through the linkage of the link assembly 2, thereby locking the self-locking mechanism 1 applied to the folding sofa.

[0029] Refer back to Figures 1 to 5 As shown, when the self-locking mechanism 1 applied to the folding sofa in this embodiment is in use, the front sofa cushion 5 is folded and stored on the rear sofa cushion 7 in the fixed chassis 6 or unfolded on one side of the rear sofa cushion 7 through the linkage of the link assembly 2. In this way, the one-step operation of opening or closing the self-locking mechanism 1 applied to the folding sofa can be realized, with simple operation and small structural volume, which can reduce the logistics cost. After the front sofa cushion 5 is unfolded, the limiting rotating rod 4 cooperates with the self-locking rivet 3 to prevent the link assembly 2 from rotating, locking the self-locking mechanism 1 applied to the folding sofa and preventing the front sofa cushion 5 from being folded due to excessive load on the rear sofa cushion 7, greatly improving the product safety. The exposed part of the iron frame mechanism of the self-locking mechanism 1 applied to the folding sofa in this embodiment has no gap, avoiding various accidental pinching accidents.

[0030] The following details the structure of the self-locking mechanism 1 applied to the folding sofa in this embodiment. Refer back to Figure 4 And Figure 5 As shown, the link assembly 2 includes a first link 21 and a second link 22. The first link 21 has a first link segment 211. One end of the first link segment 211 is pivotally connected to the lower side of the front sofa cushion 5. The other end of the first link segment 211 is pivotally connected to the fixed chassis 61. The second link 22 has a second link segment 221 and a third link segment 222 provided at one end of the second link segment 221. The second link segment 221 corresponds to and is parallel to the first link segment 211. As Figure 4 shown, the first link segment 211 is located on the left side of the second link segment 221. One end of the second link segment 221 is pivotally connected to the lower side of the front sofa cushion 5. The connecting end of the second link segment 221 and the third link segment 222 is pivotally connected to the fixed chassis 61. The third link segment 222 is pivotally connected to the lower side of the rear sofa cushion 7. When the front sofa cushion 5 is folded and stored on the rear sofa cushion 7 or unfolded on one side of the rear sofa cushion 7 through the linkage of the link assembly 2, the third link segment 222 drives the rear sofa cushion 7 to descend or ascend.

[0031] As described above, the first link 21 further has a fourth link segment 212 disposed at the pivot end of the first link segment 211 and the fixed chassis 61. The fourth link segment 212 corresponds to and is parallel to the third link segment 222. The self-locking mechanism 1 applied to the folding sofa further includes a first elastic member 8. One end of the first elastic member 8 is pivotally connected to the fixed chassis 61. As Figure 5 shown, the pivotal connection position of the first elastic member 8 and the fixed chassis 61 is below the pivotal connection position of the second link 22 and the fixed chassis 61. The other end of the first elastic member 8 is pivotally connected to the fourth link segment 212. When the front sofa cushion 5 is unfolded on one side of the rear sofa cushion 7, the first elastic member 8 is in a stretched state. Thus, during the folding and storage process of the front sofa cushion 5, as Figures 1 to 3 shown, the first elastic member 8 gradually returns to its original position, which can play a boosting role on the front sofa cushion 5, making the product easier to use. The first elastic member 8 can be a spring.

[0032] Refer back to Figure 4 and Figure 5 shown, a first connecting member 51 is provided on the lower side of the front sofa cushion 5. The first link segment 211 and the second link segment 221 are pivotally connected to the first connecting member 51. The first connecting member 51 uses a first angle steel. The horizontal side steel plate of the first angle steel is fixedly connected to the lower side of the front sofa cushion 5. The first link segment 211 and the second link segment 221 are pivotally connected to the vertical side steel plate of the first angle steel. A second connecting member 71 is provided on the lower side of the rear sofa cushion 7. The third link segment 222 is pivotally connected to the second connecting member 71. The second connecting member 71 uses a second angle steel. The horizontal side steel plate of the second angle steel is fixedly connected to the lower side of the rear sofa cushion 7. The third link segment 222 is pivotally connected to the vertical side steel plate of the second angle steel.

[0033] Please refer to Figure 6 and Figure 7 and also refer to Figure 4 and Figure 5 shown, Figure 6 is a perspective view of the unlocking state of the self-locking mechanism of the present application and Figure 7 is Figure 6Side view; as shown in the figure, the limiting rotating rod 4 has opposite first end 401, second end 402, and a middle section 403 located between the first end 401 and the second end 402. The arc-shaped hook 41 is located at the first end 401. The middle section 403 is pivotally connected to the first connecting member 51. In this embodiment, the middle section 403 of the limiting rotating rod 4 is pivotally connected between the first connecting rod section 211 and the second connecting rod section 221 of the vertical side steel plate of the first angle steel. The limiting rotating rod 4 is configured to rotate around its pivotal connection position to slide the self-locking rivet 3 out of the arc-shaped hook 41, thus unlocking the self-locking mechanism 1 applied to the folding sofa, and the front sofa cushion 5 can be further folded and stored in the fixed chassis 6 through the linkage of the connecting rod assembly 2. Further, an arc-shaped chute 511 corresponding to the limiting rotating rod 4 is provided on the first connecting member 51. In this embodiment, the arc-shaped chute 511 is located on the side of the limiting rotating rod 4 close to the second connecting rod section 221, and the center of the arc of the arc-shaped chute 511 faces the pivotal connection position of the limiting rotating rod 4. A rotating dial 42 is provided on the side of the limiting rotating piece 4. The rotating dial 42 is located in the arc-shaped chute 511. When the front sofa cushion 5 is unfolded on one side of the rear sofa cushion 7 through the connecting rod assembly 2, the rotating dial 42 abuts against the lower end of the arc-shaped chute 511. When the rotating dial 42 slides upward along the arc-shaped chute 511, the rotating dial 42 drives the limiting rotating rod 4 to rotate around its pivotal connection position to slide the self-locking rivet 3 out of the arc-shaped hook 41.

[0034] Please refer to Figure 8 and Figure 9 and also refer to Figures 4 to 7 as shown Figure 8 is a schematic diagram of the storage process of the self-locking mechanism of the present application and Figure 7 is a schematic diagram of the storage state; as shown in the figure, the self-locking mechanism 1 applied to the folding sofa further includes a second elastic member 9. One end of the second elastic member 9 is connected to the first end 401 of the limiting rotating rod 4. The other end of the second elastic member 9 is connected to the first connecting member 51. The other end of the second elastic member 9 is connected to the end of the first connecting member 51 close to the arc-shaped chute 511. As Figure 4 shown, the second elastic member 9 is connected to the right end of the first connecting member 51. When the rotating dial 42 slides upward along the arc-shaped chute 511 until it abuts against the upper end of the arc-shaped chute 511, the second elastic member 9 prevents the limiting rotating rod 4 from rotating back due to its own gravity. During the process of the front sofa cushion 5 being folded and stored in the rear sofa cushion 7 through the linkage of the connecting rod assembly 2, the second connecting rod 22 pushes the rotating dial 42 to make the rotating dial 42 slide downward along the arc-shaped chute 511, and the second elastic member 9 drives the limiting rotating rod 4 to reset.

[0035] Refer back to Figures 1 to 3As shown in the figure, in this embodiment, a support plate 52 is provided on one side of the front sofa cushion 5 away from the rear sofa cushion 7. When the front sofa cushion 5 is folded and stored on the rear sofa cushion 7, the support plate 52 fits against the outer surface of the sofa frame 6. When the front sofa cushion 5 is unfolded on one side of the sofa cushion 7, the support plate 52 supports on the ground to support the front sofa cushion 5.

[0036] In summary, the present application provides a self-locking mechanism applied to a folding sofa. The front sofa cushion is linked by a connecting rod assembly to be folded and stored on the rear sofa cushion inside the sofa frame or unfolded on one side of the rear sofa cushion. In this way, the opening or closing operation of the sofa bed can be completed in one step, with simple operation and a small structural volume, which can reduce logistics costs. After the front sofa cushion is unfolded, the limit rotating rod and the self-locking rivet cooperate to prevent the connecting rod assembly from rotating, locking the sofa bed and preventing the front sofa cushion from being folded due to excessive load on the rear sofa cushion, greatly improving the product safety. At the same time, there is no gap in the exposed part of the iron frame mechanism of the self-locking mechanism applied to the folding sofa in the present application, avoiding various accidental pinching accidents.

[0037] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0038] The embodiments of the present application have been described above with reference to the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A self-locking mechanism applied to a folding sofa, characterized in that: include: A connecting rod assembly, one end of which is pivotally connected to the front sofa cushion and the other end of which is pivotally connected to the fixed bottom frame of the sofa frame. The front sofa cushion is linked by the connecting rod assembly to be folded and stored on the rear sofa cushion in the sofa frame or unfolded on one side of the rear sofa cushion; A self-locking rivet, arranged on the connecting rod assembly; A limit rotation rod is movably arranged on the front sofa cushion, and one end of the limit rotation rod is provided with an arc hook corresponding to the self-locking rivet. When the front sofa cushion is unfolded on one side of the rear sofa cushion, the connecting rod assembly drives the self-locking rivet to slide into the arc hook through the opening of the arc hook, and the limit rotation rod cooperates with the self-locking rivet to prevent the connecting rod assembly from rotating.

2. The self-locking mechanism for a folding sofa according to claim 1, characterized in that: The connecting rod assembly comprises: A first connecting rod, comprising a first connecting rod section, one end of which is pivotally connected to the lower side of the front sofa cushion, and the other end of which is pivotally connected to the fixed base frame; The second connecting rod comprises a second connecting rod section and a third connecting rod section arranged at one end of the second connecting rod section, the second connecting rod section corresponds to the first connecting rod section and is parallel to each other, one end of the second connecting rod section is pivotally connected to the lower side of the front sofa cushion, the connecting end of the second connecting rod section and the third connecting rod section is pivotally connected to the fixed base frame, and the third connecting rod section is pivotally connected to the lower side of the rear sofa cushion, wherein when the front sofa cushion is folded and stored on the rear sofa cushion or unfolded on one side of the rear sofa cushion through the linkage of the connecting rod assembly, the third connecting rod section drives the rear sofa cushion to descend or ascend.

3. The self-locking mechanism for a folding sofa according to claim 2, characterized in that: Also includes: A first elastic member, one end of which is pivotally connected to the fixed base frame, the first connecting rod also has a fourth connecting rod segment arranged at the pivotal end of the first connecting rod segment and the fixed base frame, the fourth connecting rod segment corresponds to the third connecting rod segment and is parallel to each other, the other end of the first elastic member is pivotally connected to the fourth connecting rod segment, wherein when the front sofa cushion is unfolded to one side of the rear sofa cushion, the first elastic member is in a stretched state.

4. The self-locking mechanism for a folding sofa according to claim 2, characterized in that: A first connecting member is arranged on the lower side of the front sofa cushion, and the first connecting rod section and the second connecting rod section are pivotally connected to the first connecting member; a second connecting member is arranged on the lower side of the rear sofa cushion, and the third connecting rod section is pivotally connected to the second connecting member.

5. The self-locking mechanism for a folding sofa according to claim 4, characterized in that: The limit rotation rod has a first end, a second end and a middle section located between the first end and the second end. The arc hook is located at the first end, and the middle section is pivotally connected to the first connecting member. The limit rotation rod is configured to rotate around its pivot position to allow the self-locking rivet to slide out of the arc hook.

6. The self-locking mechanism for a folding sofa according to claim 5, characterized in that: The first connecting member is provided with an arc-shaped slide groove corresponding to the limit rotation rod, and a rotating paddle is provided on the side of the limit rotation piece, and the rotating paddle is located in the arc-shaped slide groove. When the front sofa cushion is unfolded to one side of the rear sofa cushion through the connecting rod assembly, the rotating paddle abuts against the lower end of the arc-shaped slide groove. When the rotating paddle slides upward along the arc-shaped slide groove, the rotating paddle drives the limit rotation rod to rotate around its pivot position to make the self-locking rivet slide out of the arc-shaped hook.

7. The self-locking mechanism for a folding sofa according to claim 6, characterized in that: Also includes: A second elastic member, one end of which is connected to the first end of the position-limiting rotation rod, and the other end of which is connected to the first connecting member, wherein when the rotating paddle slides upward along the arc-shaped slide groove until it abuts against the upper end of the arc-shaped slide groove, the second elastic member prevents the position-limiting rotation rod from rotating due to its own gravity.

8. The self-locking mechanism for a folding sofa according to claim 7, characterized in that: When the front sofa cushion is folded and stored in the rear sofa cushion via the linkage assembly, the second linkage pushes the rotating paddle to slide downward along the arc-shaped slide groove, and the second elastic member drives the limit rotating rod to reset.

9. The self-locking mechanism for a folding sofa according to claim 7, characterized in that: The limiting rotation rod is located between the first connecting rod section and the second connecting rod section, the arc-shaped slide groove is located on the side of the limiting rotation rod close to the second connecting rod section, and the arc center of the arc-shaped slide groove faces the pivot position of the limiting rotation rod, and the second elastic member is connected to one end of the first connecting member close to the arc-shaped slide groove.

10. The self-locking mechanism for a folding sofa according to claim 1, characterized in that: A support plate is arranged on a side of the front sofa cushion away from the rear sofa cushion. When the front sofa cushion is folded and stored on the rear sofa cushion, the support plate is attached to the outer surface of the sofa frame.

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