Cushion linkage mechanism and foldable sofa bed
By designing a cushion linkage mechanism, the cushion can automatically avoid interference during the expansion and closing of the cushion in the folding sofa bed, the problem of interference between the cushion and the footboard in the prior art is solved, and the convenience and aesthetics of the design are improved.
Patent Information
- Application Number
- CN202510657402.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2025-06-20
AI Technical Summary
During the expansion and closing movement of the existing one-fold sofa bed, the cushion and foot board are prone to interference, resulting in increased design difficulty and reduced aesthetics.
A cushion linkage mechanism is designed, including two linkage parts, limiting rods and connecting rods. Through the cooperation of pivot contacts and slide chutes, the cushion automatically avoids interference during the expansion and closing of the sofa bed.
It effectively avoids interference between the seat cushion and the foot board, simplifies the design process, improves overall aesthetics, and ensures that the seat cushion can move normally when fully opened or closed.
Smart Images
Figure CN120167761A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a piece of furniture, in particular to a cushion linkage mechanism and a folding sofa bed. Background Art
[0002] The bed is one of the essential household items in people's home life. However, the bed usually occupies a large area and often occupies a considerable living space. In order to improve the reasonable use of the area, people have improved the use of the bed to obtain a larger activity space. Therefore, the sofa bed industry was born.
[0003] See also Figure 1 and Figure 2 , Figure 1 This is the unfolded stereogram of the current folding sofa bed and Figure 2 yes Figure 1 As shown in the figure, in order to ensure that the position of the seat cushion S1 does not shift during the unfolding and folding movement of the folding sofa bed S, the seat cushion S1 is usually directly fixed on the bed frame S2. As a result, the folding sofa bed S cannot avoid the interference between the seat cushion S1 and various linkage mechanisms during the unfolding and folding movement. Figure 1 As shown in the figure, there is interference between the seat cushion S1 and the foot plate S3, so a groove S4 must be made on the side where the seat cushion S1 and the foot plate S3 are adjacent to each other to reduce the squeezing of the foot plate S3 on the seat cushion S1. This not only makes the design of the seat cushion S1 more difficult, but also affects the appearance of the seat cushion S1. Summary of the invention
[0004] The embodiments of the present application provide a seat cushion linkage mechanism and a folding sofa bed, which solve the problem that the current folding sofa bed needs to have grooves in the seat cushion to avoid footboards.
[0005] In order to solve the above technical problems, this application is implemented as follows: In a first aspect, a cushion linkage mechanism is provided, which is applied to the linkage between the cushion and the footboard of a single-fold sofa bed. It includes two linkage members, a limiting rod, and a connecting rod. The two linkage members are symmetrically arranged on both sides in the width direction of the single-fold sofa bed. Each linkage member includes a first linkage plate and a second linkage plate. One end of the first linkage plate is connected to one end of the second linkage plate, and the first linkage plate and the second linkage plate form an included angle. One end of the first linkage plate has a pivot point, and the other end of the first linkage plate has a chute. One end of the limiting rod passes through the chute and is fixed on the footboard. The limiting rod slides relatively in the chute to drive the first linkage plate and the second linkage plate to rotate around the pivot point. Both ends of the connecting rod are connected to the other ends of the second linkage plates of the two linkage members. The connecting rod is connected to the cushion. When the single-fold sofa bed is in the unfolded state, the limiting rod is located on the side of the chute away from the connecting rod, and the cushion is located in the arc-shaped groove of the footboard. During the folding process of the single-fold sofa bed, the footboard drives the limiting rod to slide relatively in the chute, the first linkage plate and the second linkage plate rotate around the pivot point, and the connecting rod drives the cushion to move away from the bed frame and the arc-shaped groove of the footboard and slide out of the arc-shaped groove of the footboard.
[0006] In one embodiment, the first linkage plate and the second linkage plate are of an integral structure.
[0007] In one embodiment, the included angle is 90 degrees.
[0008] In one embodiment, the pivot point is a round hole, and the first linkage plate and the second linkage plate are pivotally connected to the bed frame by a pivot rod passing through the round hole.
[0009] In one embodiment, the chute is a rectangular through-hole.
[0010] In one embodiment, it further includes a gasket. The gasket is arranged between the first linkage plate and the footboard. One end of the limiting rod passes through the chute and the gasket and is fixed on the footboard.
[0011] In one embodiment, it further includes: a decorative plate, which corresponds to the shape of the footboard, and the decorative plate is attached to the outside of the footboard.
[0012] In a second aspect, a single-fold sofa bed is provided, which includes: the cushion linkage mechanism as in the first aspect and a sofa main body. The sofa main body has a bed frame, a cushion, a footboard, and a backrest. The bed frame is arranged on the sofa main body, and the bed frame can be stored and unfolded in the sofa main body. The cushion linkage mechanism connects the bed frame and the footboard. The cushion is connected to the connecting rod of the cushion linkage mechanism. The backrest is arranged on the footboard.
[0013] In one embodiment, it further includes: a gusset plate. One side plate is arranged on the footboard, and the other side plate of the gusset plate is connected to the backrest. The backrest is arranged on the footboard through the gusset plate.
[0014] In one of the embodiments, the sofa body further has two sofa armrests, and the two sofa armrests are symmetrically located on both sides of the bed frame.
[0015] In the embodiment of the present application, the pivot point of the first linkage plate and the second linkage plate is pivotally connected to the bed frame. The other end of the first linkage plate is provided on the footboard through a limiting rod in a chute. The other end of the second linkage plate is connected to a connecting rod, and at the same time, the seat cushion is fixed on the connecting rod. In this way, during the folding process of the single-fold sofa bed, the footboard drives the limiting rod to slide relatively in the chute, driving the first linkage plate and the second linkage plate to rotate around the pivot point. Further, the connecting rod drives the seat cushion to move away from the arc grooves of the bed frame and the footboard and slide out of the arc groove of the footboard. Conversely, during the unfolding process of the single-fold sofa bed, the connecting rod drives the seat cushion to approach the arc grooves of the bed frame and the footboard and slide into the arc groove of the footboard. In this way, interference between the seat cushion and the footboard can be avoided, and at the same time, the seat cushion can move into place when the single-fold sofa bed is in a fully opened or fully folded state. The seat cushion linkage mechanism of the present application enables the seat cushion not to require a slot design during design, making the design more convenient and diverse, and the overall appearance more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to provide a further understanding of the present application and form 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 of the present application. In the drawings: Figure 1 is a three-dimensional view of the current unfolded single-fold sofa bed; Figure 2 is Figure 1 a partial enlarged view of part A in Figure 3 is a schematic diagram of the seat cushion linkage mechanism of the first embodiment of the present application connecting the seat cushion and the footboard Figure 1 ; Figure 4 is Figure 3 a partial schematic diagram of Figure 5 is Figure 4 a decomposition of Figure 6 is a schematic diagram of the seat cushion linkage mechanism of the first embodiment of the present application connecting the seat cushion and the footboard Figure 2 ; Figure 7 is a schematic diagram of the seat cushion linkage mechanism of the first embodiment of the present application connecting the seat cushion and the footboard Figure 3 ; Figure 8 is an exploded view of the decorative plate and the footboard of the seat cushion linkage mechanism of the first embodiment of the present application; Figure 9 is a schematic diagram of the unfolded state of the single-fold sofa bed of the second embodiment of the present application; Figure 10It is a schematic diagram of the folded state of the iron frame of a one-fold sofa bed according to the second embodiment of the present application. Detailed implementation manners
[0017] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0018] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.
[0019] In addition, regarding the "first", "second", etc. used herein, they do not particularly refer to the order or sequence, nor are they used to limit the present application. They are only used to distinguish components or operations described with the same technical terms.
[0020] Please refer to Figures 3 to 5 , Figure 3 It is a schematic diagram showing the connection between the seat cushion linkage mechanism and the foot board in the first embodiment of the present application. Figure 1 , Figure 4 is Figure 3 a partial schematic diagram of Figure 5 and Figure 4 is
[0021] a decomposition diagram of . As shown in the figure, the seat cushion linkage mechanism 10 of this embodiment is applied to the linkage between the seat cushion 201 and the foot board 202 of a one-fold sofa bed. The seat cushion linkage mechanism 10 includes two linkage members 1, a limiting rod 2, and a connecting rod 3. The two linkage members 1 are symmetrically arranged on both sides in the width direction of the one-fold sofa bed. Each linkage member 1 includes a first linkage plate 11 and a second linkage plate 12. One end of the first linkage plate 11 is connected to one end of the second linkage plate 12, and the first linkage plate 11 and the second linkage plate 12 form an included angle α. In this embodiment, the first linkage plate 11 and the second linkage plate 12 are of an integral structure, and the included angle α is 90°. One end of the first linkage plate 11 has a pivot point 13. The pivot point 13 is pivotally connected to the bed frame 203 on the side of the one-fold sofa bed close to the foot board 202. The pivot point 13 is a round hole, and the first linkage plate 11 and the second linkage plate 12 are pivotally connected to the bed frame 203 by a pivot rod passing through the round hole. The other end of the first linkage plate 11 has a chute 14.One end of the limiting rod 2 passes through the sliding groove 14 and is fixed to the foot plate 202. In this embodiment, a gasket 15 is provided between the first linkage plate 11 and the foot plate 202. One end of the limiting rod 2 passes through the sliding groove 14 and the gasket 15 and is fixed to the foot plate 202. The relative sliding of the limiting rod 2 in the sliding groove 14 drives the first linkage plate 11 and the second linkage plate 12 to rotate around the pivot point 13. Here, the relative sliding means that the limiting rod 2 is fixed in the sliding groove 14, and the first linkage plate 11 drives the sliding groove 14 to move. In this embodiment, the limiting rod 2 is fixed at the lower notch position of the arc-shaped groove 2021 of the foot plate 202. And the extending direction of the sliding groove 14 faces the bed frame 203. The sliding groove 14 is a rectangular through hole. Both ends of the connecting rod 3 are connected to the other ends of the second linkage plates 12 of the two linkage members 1. The connecting rod 3 is connected to the seat cushion 201.
[0022] In the seat cushion linkage mechanism 10 of this embodiment, the pivot point 13 of the first linkage plate 11 and the second linkage plate 12 is pivotally connected to the bed frame 203. The other end of the first linkage plate 11 is provided with a sliding groove 14 on the foot plate 202 through the limiting rod 2. The other end of the second linkage plate 12 is connected to the connecting rod 3. At the same time, the seat cushion 201 is fixed on the connecting rod 3. Thus, when a folding sofa bed is in the unfolded state, the limiting rod 2 is located on the side of the sliding groove 14 away from the connecting rod 3, and the seat cushion 201 is located in the arc-shaped groove of the foot plate 202.
[0023] As described above, please refer to Figure 6 and Figure 7 , which are respectively the schematic diagrams of the seat cushion linkage mechanism of the first embodiment of the present application connecting the seat cushion and the foot plate Figure 2 and the schematic diagram Figure 3 , where Figure 6 is a schematic diagram of the semi-folded state of a folding sofa bed, Figure 7 is a schematic diagram of the folded state of a folding sofa bed. As shown in the figure, during the folding process of the folding sofa bed, the foot plate 202 drives the limiting rod 2 to slide relatively in the sliding groove 14, driving the first linkage plate 11 and the second linkage plate 12 to rotate around the pivot point 13. Furthermore, the connecting rod 3 drives the seat cushion 201 to move away from the bed frame 203 and the arc-shaped groove 2021 of the foot plate 202 and slide out from the arc-shaped groove 2021 of the foot plate 202. On the contrary, during the unfolding process of the folding sofa bed, the connecting rod 3 drives the seat cushion 201 to approach the bed frame 203 and the arc-shaped groove 2021 of the foot plate 202 and slide into the arc-shaped groove 2021 of the foot plate 202. Thus, during the unfolding and folding processes of the folding sofa bed, the interference between the seat cushion 201 and the foot plate 202 can be avoided, and at the same time, the seat cushion 201 can move into place when the folding sofa bed is in the fully opened or fully folded state. The seat cushion linkage mechanism 10 of this embodiment enables the seat cushion 201 not to consider the slot design during design, making the design more convenient and diverse, and the overall appearance more beautiful.
[0024] Please refer to Figure 8, which is an exploded view of the decorative plate and the foot plate of the seat cushion linkage mechanism of the first embodiment of the present application. As shown in the figure, in this embodiment, the seat cushion linkage mechanism 10 further includes a decorative plate 4. The shape of the decorative plate 4 corresponds to that of the foot plate 202, and here "corresponding" means that the shapes of the decorative plate 4 and the foot plate 202 are the same. The decorative plate 4 is attached to the outside of the foot plate 202. The decorative plate 4 is used to cover some screws on the foot plate 202 to improve the overall aesthetics.
[0025] Please refer to Figure 9 and Figure 10 , which is a schematic diagram of the unfolded state of a one-fold sofa bed and a schematic diagram of the retracted state of the iron frame of the second embodiment of the present application. As shown in the figure, the one-fold sofa bed 100 of this embodiment includes the seat cushion linkage mechanism 10 and the sofa main body 20 in the above-mentioned first embodiment. The sofa main body 20 has a seat cushion 201, a foot plate 202, a bed frame 203 and a backrest 204. The bed frame 203 is provided on the sofa main body 20. The bed frame 203 can be stored and unfolded on the sofa main body 20. The bed frame 203 is a common one-fold bed frame on the market, and its structure and folding process are conventional technical means in the art. Therefore, the structure and folding process of the bed frame 203 will not be described in detail in this embodiment. The seat cushion linkage mechanism 10 connects the bed frame 203 and the foot plate 202, and the specific connection method can be seen in the description of the above-mentioned first embodiment.
[0026] As described above, the seat cushion 201 is connected to the connecting rod 3 of the seat cushion linkage mechanism 10. The backrest 204 is provided on the foot plate 202. The backrest 204 is provided on the foot plate 202 through an angle plate 30. Specifically, one side plate of the angle plate 30 is provided on the foot plate 202. The other side plate of the angle plate 30 is connected to the backrest 204. In this embodiment, the sofa main body 20 further has two sofa armrests (not shown in the figure), and the two sofa armrests are symmetrically located on both sides of the bed frame 203.
[0027] In summary, the present application provides a seat cushion linkage mechanism and a one-fold sofa bed. The pivot point of the first linkage plate and the second linkage plate is pivotally connected to the bed frame. The other end chute of the first linkage plate is arranged on the foot plate through a limiting rod. The other end of the second linkage plate is connected to the connecting rod, and at the same time, the seat cushion is fixed on the connecting rod. In this way, during the retraction process of the one-fold sofa bed, the foot plate drives the limiting rod to slide relatively in the chute, driving the first linkage plate and the second linkage plate to rotate around the pivot point, so that the connecting rod drives the seat cushion to move away from the arc grooves of the bed frame and the foot plate and slide out of the arc groove of the foot plate. Conversely, during the unfolding process of the one-fold sofa bed, the connecting rod drives the seat cushion to approach the arc grooves of the bed frame and the foot plate and slide into the arc groove of the foot plate. In this way, the interference between the seat cushion and the foot plate can be avoided, and at the same time, the seat cushion can move into place when the one-fold sofa bed is in the fully opened or fully retracted state. The seat cushion linkage mechanism of the present application enables the seat cushion not to need to consider the slot design during design, making the design more convenient and diverse, and the overall appearance more beautiful.
[0028] It should be noted that, in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising 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 statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.
[0029] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the spirit of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.
Claims
1. A seat cushion linkage mechanism, applied to the linkage between the seat cushion and the footboard of a folding sofa bed, characterized in that: include: Two linkage members are symmetrically arranged on both sides of the folding sofa bed in the width direction, each of the linkage members includes a first linkage plate and a second linkage plate, one end of the first linkage plate is connected to one end of the second linkage plate, and the first linkage plate and the second linkage plate have an included angle, one end of the first linkage plate has a pivot point, and the other end of the first linkage plate has a slide groove; A limiting rod, one end of which passes through the slide slot and is fixed to the foot plate, wherein the limiting rod slides relatively in the slide slot to drive the first linkage plate and the second linkage plate to rotate at the pivot point; A connecting rod, both ends of which are connected to the other ends of the second linkage plates of the two linkage members, and the connecting rod is connected to the seat cushion; The foldable sofa bed is in an unfolded state, the limit rod is located on a side of the slide groove away from the connecting rod, and the seat cushion is located in the arc groove of the foot plate. When the foldable sofa bed is folded, the foot plate drives the limit rod to slide relatively in the slide groove, drives the first linkage plate and the second linkage plate to rotate around the pivot point, and the connecting rod drives the seat cushion to move away from the bed frame and the arc groove of the foot plate, and slide out of the arc groove of the foot plate.
2. The seat cushion linkage mechanism according to claim 1, characterized in that: The first linkage plate and the second linkage plate are an integrated structure.
3. The seat cushion linkage mechanism according to claim 1, characterized in that: The angle is 90 degrees.
4. The seat cushion linkage mechanism according to claim 1, characterized in that: The pivot point is a circular hole, and the first linkage plate and the second linkage plate are pivotally connected to the bed frame by a pivot rod passing through the circular hole.
5. The seat cushion linkage mechanism according to claim 1, characterized in that: The slide groove is a rectangular through hole.
6. The seat cushion linkage mechanism according to claim 1, characterized in that: It also includes a gasket, which is arranged between the first linkage plate and the foot plate, and one end of the limit rod passes through the slide groove and the gasket and is fixed to the foot plate.
7. The seat cushion linkage mechanism according to claim 1, characterized in that: Also includes: A decorative plate, wherein the decorative plate corresponds to the shape of the foot plate and is arranged on the outer side of the foot plate.
8. A folding sofa bed, characterized in that: include: The cushion linkage mechanism and sofa body as described in claim 1, wherein the sofa body has a bed frame, a cushion, a footboard and a backrest, the bed frame is arranged on the sofa body, the bed frame can be stored and unfolded on the sofa body, the cushion linkage mechanism connects the bed frame and the footboard, the cushion is connected to the connecting rod of the cushion linkage mechanism, and the backrest is arranged on the footboard.
9. The folding sofa bed according to claim 8, characterized in that: It further comprises: a corner plate, one side plate of which is arranged on the foot plate, the other side plate of the corner plate is connected to the backrest, and the backrest is arranged on the foot plate through the corner plate.
10. The folding sofa bed according to claim 8, characterized in that: The sofa body further comprises two sofa armrests, and the two sofa armrests are symmetrically located on both sides of the bed frame.