Mattress for sofa bed

Abstract

The utility model discloses sofa bed is matched with mattress, including lower layer pad, middle layer pad and upper layer pad, the lower surface of middle layer pad and lower layer pad are bonded, the upper surface of middle layer pad and upper layer pad are bonded, and the hardness of middle layer pad is lower than the hardness of lower layer pad, the hardness of upper layer pad is lower than the hardness of middle layer pad, and the both sides of upper layer pad are equipped with plastic protection strip respectively. The sofa bed is matched with mattress of the utility model, through three layers of sponge gradient hardness design, lower layer high hardness guarantees support, and upper layer low hardness improves the degree of fitting, and the function contradiction of sitting and lying is solved. Plastic protection strip enhances the edge stability, avoids deformation. The segmented long groove design of lower layer adapts folding demand, reduces abrasion. Memory cotton upper layer improves sleep comfort, and each layer is bonded firmly, and the whole gives consideration to support, comfort and folding durability, realizes sofa bed double -use experience optimization.

Description

Technical Field

[0001] This utility model belongs to the field of mattress technology, specifically relating to mattresses for sofa beds. Background Technology

[0002] As a type of furniture that combines the functions of a sofa for sitting and reclining with the function of a bed for sleeping, the mattress of a sofa bed must simultaneously meet the needs of providing support for daily sitting and leaning and comfort for nighttime sleep, while also being adaptable to folding and deformation. Currently, most sofa bed mattresses use a single material or a simple composite structure, which generally presents a functional contradiction: if the firmness is too high to ensure support when sitting, the fit is insufficient during sleep, easily causing a feeling of pressure; if the firmness is too low to improve sleep comfort, it is prone to sagging when sitting, affecting the stability of the sofa's shape. Meanwhile, traditional mattresses lack targeted design at folding points, making them prone to localized wear and tear and loss of elasticity after repeated folding, especially at the edges where insufficient support often leads to deformation. Furthermore, most mattresses have an unreasonable combination of materials, failing to provide gradient support according to the pressure needs of different parts of the body, making it difficult to balance the comfort of sitting and lying down. Utility Model Content

[0003] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a sofa bed matching mattress, including a lower layer, a middle layer, and an upper layer arranged sequentially from top to bottom. The lower surface of the middle layer is bonded to the lower layer, and the upper surface of the middle layer is bonded to the upper layer. The hardness of the middle layer is lower than that of the lower layer, and the hardness of the upper layer is lower than that of the middle layer. Plastic protective strips are provided on both sides of the upper layer. The lower layer, middle layer, and upper layer are all made of sponge. The lower layer is arranged sequentially from front to back as a front section, a middle section, and a rear section. The upper and lower surfaces of the front section are provided with several long grooves, the upper and lower surfaces of the middle section are provided with several long grooves, and the lower surface of the rear section is provided with several long grooves.

[0004] As a preferred embodiment of the above technical solution, the plastic protective strip is made of polyurethane plastic, and the hardness of the plastic protective strip is 150-170N.

[0005] As a preferred embodiment of the above technical solution, the cross-section of the plastic protective strip is a right-angled trapezoid, the inner side of the plastic protective strip has an outward inclined surface, and the two sides of the upper pad are respectively provided with an inward inclined surface. The inward inclined surface and the corresponding outward inclined surface are attached to each other and bonded together.

[0006] As a preferred embodiment of the above technical solution, the upper pad is made of memory foam, and the hardness of the upper pad is 30-50N.

[0007] As a preferred embodiment of the above technical solution, the middle layer pad is made of sponge, and the hardness of the middle layer pad is 50-70N.

[0008] As a preferred embodiment of the above technical solution, the lower pad is made of sponge, and the hardness of the lower pad is 120-150N.

[0009] As a preferred embodiment of the above technical solution, the cross-sections of the long grooves on the upper and lower surfaces of the front section are respectively isosceles trapezoidal, the cross-sections of the long grooves on the upper surface of the middle section are respectively circular, and the cross-sections of the long grooves on the lower surface of the middle section are respectively Y-shaped.

[0010] The beneficial effects of this utility model are as follows: The sofa bed mattress of this utility model features a three-layer foam gradient firmness design. The lower layer has high firmness to ensure support, while the upper layer has low firmness to improve fit, resolving the conflict between sitting and lying functions. Plastic protective strips enhance edge stability and prevent deformation. The segmented groove design of the lower layer adapts to folding needs and reduces wear. The upper layer of memory foam enhances sleep comfort, and all layers are firmly bonded, achieving an overall balance of support, comfort, and folding durability, thus optimizing the dual user experience of the sofa bed. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0012] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0013] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship 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," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0015] like Figure 1 As shown, the sofa bed mattress includes a lower mattress 1, a middle mattress 2, and an upper mattress 3 arranged sequentially from top to bottom. The lower surface of the middle mattress 2 is bonded to the lower mattress 1, and the upper surface of the middle mattress 2 is bonded to the upper mattress 3. The hardness of the middle mattress 2 is lower than that of the lower mattress 1, and the hardness of the upper mattress 3 is lower than that of the middle mattress 2. Plastic protective strips 4 are provided on both sides of the upper mattress 3. The lower mattress 1, middle mattress 2, and upper mattress 3 are all made of sponge. The lower mattress 1 is arranged sequentially from front to back as a front section 5, a middle section 6, and a rear section 7. The upper and lower surfaces of the front section 5 are provided with several long grooves 8, the upper and lower surfaces of the middle section 6 are provided with several long grooves 8, and the lower surface of the rear section 7 is provided with several long grooves 8.

[0016] Furthermore, the plastic protective strip 4 is made of polyurethane plastic.

[0017] Furthermore, the plastic protective strip 4 has a right-angled trapezoidal cross-section, and its inner side has an outwardly inclined surface 9. The upper pad 3 has inwardly inclined surfaces 10 on both sides, and the inwardly inclined surfaces 10 and the corresponding outwardly inclined surfaces 9 are attached and bonded together. The thickness of the plastic protective strip 4 (corresponding to the height of the isosceles trapezoid) is approximately 51 mm.

[0018] Furthermore, the upper pad 3 is made of memory foam, and its hardness is 30-50N. The memory foam is preferably an environmentally friendly modified memory foam. In this embodiment, the modified memory foam used in the upper pad 3 has a hardness of 40N and a thickness of approximately 51mm.

[0019] Furthermore, the middle layer pad is made of sponge. In this embodiment, the middle layer pad is made of polyurethane sponge, which has a bouncy texture, a hardness of 65N, and a thickness of about 51mm.

[0020] Furthermore, the lower pad 1 is made of sponge. In this embodiment, the lower pad 1 uses ordinary sponge with a hardness of 140N and a thickness of approximately 152mm. The sponge hardness test adopts standards such as ISO 2439 and GB / T 6669-2008. When testing the hardness of sponge by the indentation method, the hardness is usually expressed as the force (Newtons) required to indent to a specified depth.

[0021] Furthermore, the cross-sections of the long grooves 8 on the upper and lower surfaces of the front section 5 are respectively isosceles trapezoidal, the cross-sections of the long grooves 8 on the upper surface of the middle section 6 are respectively circular, and the cross-sections of the long grooves 8 on the lower surface of the middle section 6 are respectively Y-shaped. The long grooves 8 on the upper and lower surfaces of the front section 5 are more densely distributed, providing greater deformation space for the leg support area on the mattress. When the sofa bed is folded into a sofa state, this part can bend significantly, allowing it to fit more closely with the bed frame. The middle section 6 mainly supports the buttocks, and the Y-shaped cross-section of the long grooves 8 can improve elasticity and enhance sitting comfort.

[0022] It is worth mentioning that the technical features of memory foam, sponge, polyurethane plastic and other technologies involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and control method and spatial arrangement of these technical features can be adopted by conventional choices in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated in detail.

[0023] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experimentation on the basis of the prior art should be within the scope of protection defined by the claims.

Claims

1. A sofa bed with a matching mattress, characterized in that, The device includes a lower pad, a middle pad, and an upper pad arranged sequentially from top to bottom. The lower surface of the middle pad is bonded to the lower pad, and the upper surface of the middle pad is bonded to the upper pad. The hardness of the middle pad is lower than that of the lower pad, and the hardness of the upper pad is lower than that of the middle pad. Plastic protective strips are provided on both sides of the upper pad. The lower, middle, and upper pads are all made of sponge. The lower pad is divided into a front section, a middle section, and a rear section from front to back. The upper and lower surfaces of the front section, the middle section, and the rear section have several long grooves. The upper pad is made of memory foam with a hardness of 30-50N. The middle pad is made of sponge with a hardness of 50-70N. The lower pad is made of sponge with a hardness of 120-150N.

2. The mattress for the sofa bed as described in claim 1, characterized in that, The plastic protective strip is made of polyurethane plastic and has a hardness of 150-170N.

3. The mattress for the sofa bed as described in claim 2, characterized in that, The plastic protective strip has a right-angled trapezoidal cross-section and an outwardly inclined surface on the inner side. The upper pad has an inwardly inclined surface on both sides. The inwardly inclined surface and the corresponding outwardly inclined surface are attached and bonded together.

4. The mattress for the sofa bed as described in claim 1, characterized in that, The cross-sections of the long grooves on the upper and lower surfaces of the front section are respectively isosceles trapezoidal, the cross-sections of the long grooves on the upper surface of the middle section are respectively circular, and the cross-sections of the long grooves on the lower surface of the middle section are respectively Y-shaped.

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