US20250318654A1

US20250318654A1 - Flexible and Portable Sofa Bed

Info

Publication number: US20250318654A1
Application number: US18/633,450
Authority: US
Inventors: Xin Zhang
Original assignee: Individual
Current assignee: Individual
Priority date: 2024-04-11
Filing date: 2024-04-11
Publication date: 2025-10-16

Abstract

A flexible and portable sofa bed comprises a cushion assembly and a support frame; the cushion assembly is provided with a front cushion, a center cushion and a back cushion along the longitudinal direction, one ends of the front cushion and the center cushion are foldable connected, and the back cushion can be independently turned relative to the center cushion; the center cushion is connected with the support frame in a sliding way, and the back cushion is connected with the support frame in a rotating way. The movable connection of the cushion assembly and the support frame enables the sofa bed to change its working state.

Description

TECHNICAL FIELD

The present invention relates to the technical field of sofa beds, in particular to a flexible and portable sofa bed.

BACKGROUND

A sofa bed is a popular furniture at present. Compared with other furniture (such as separate chairs), sofa bed allows more people to sit or lie down comfortably side by side. A common sofa bed consists of a frame structure and a mattress, which can be unfolded to switch the sofa bed in various modes, so that the sofa bed can be transformed into a sitting sofa and a horizontal bed, and pillows, cushions and the like are added.
U.S. Pat. No. 14,369,224 discloses an automatic sofa bed, which is controlled by an actuating device, and the user can switch from the sofa configuration to the bed configuration simply by pressing a button, and vice versa, which is convenient to use. However, this type of sofa bed is complicated in structure, occupies a large space, and its parts are easy to be damaged, and it is difficult for ordinary people to move or lift, so it is not flexible in daily use.
U.S. Pat. No. 17,853,077 discloses a sofa bed with a sliding system, which has three movable seat bases and can be switched between bed configuration and sofa configuration. The connection structure between parts of this sofa bed is complicated, which is not convenient for users to switch or store between configurations at any time.
Based on the above problems, it is necessary to provide a brand-new sofa bed, which has various use modes, is flexible and light, and occupies small space. At the same time, the sofa bed is simple and light in structure, easy to assemble and convenient to use, and further improves the user experience.

SUMMARY

The present invention provides a flexible and portable sofa bed, which includes a cushion assembly and a support frame; and

- wherein, the cushion assembly is provided with a front cushion, a center cushion and a back cushion along a longitudinal direction, wherein one ends of the front cushion and the center cushion are foldable connected, and the back cushion can be independently turned relative to the center cushion; and
- wherein, the center cushion is connected with the support frame in a sliding way, the back cushion is connected with the support frame in a rotating way, and the movable connection of the cushion assembly and the support frame enables the sofa bed to change a working state; and
- when the front cushion is folded on the center cushion and the back cushion leans against the support frame, the sofa bed is in a sofa state; and
- when the front cushion is turned to a plane continuous with the center cushion, and the back cushion leans against the support frame, the sofa bed is in a recliner state; and
- when the center cushion is pulled out from the support frame, the front cushion and the back cushion are turned over to make the front cushion, the center cushion and the back cushion become a continuous plane, the sofa bed is in a bed state.

The present invention further provides a flexible and portable sofa bed, which includes a cushion assembly and a support frame; and

- wherein, the cushion assembly is provided with a front cushion, a center cushion and a back cushion along a longitudinal direction, wherein one ends of the front cushion and the center cushion are foldable connected, and the back cushion can be independently turned relative to the center cushion; and
- wherein, the support frame is provided with a storage space, and the cushion assembly covers the storage space, wherein the center cushion is connected with the support frame in a sliding way, and the back cushion is connected with the support frame in a rotating way; and the movable connection of the cushion assembly and the support frame enables the sofa bed to change a working state; and
- when the front cushion is folded on the center cushion and the back cushion leans against the support frame, the storage space supports the center cushion, and the sofa bed is in a sofa state; and
- when the front cushion is turned to a plane continuous with the center cushion, and the back cushion leans against the support frame, the storage space supports the center cushion, and the sofa bed is in a recliner state; and
- when the center cushion is pulled out from the support frame, the front cushion and the back cushion are turned over to make the front cushion, the center cushion and the back cushion become a continuous plane, the storage space supports the back cushion, and the sofa bed is in a bed state.

The present invention further provides a method for realizing daily life, work and entertainment by using a sofa bed, comprising providing a flexible and light sofa bed, wherein the sofa bed comprises a cushion assembly and a support frame; and

- wherein, the cushion assembly is provided with a front cushion, a center cushion and a back cushion along a longitudinal direction, wherein one ends of the front cushion and the center cushion are foldable connected, and the back cushion can be independently turned relative to the center cushion; and
- wherein, the center cushion is connected with the support frame in a sliding way, the back cushion is connected with the support frame in a rotating way, and the movable connection of the cushion assembly and the support frame enables the sofa bed to change a working state; and
- when the front cushion is folded on the center cushion and the back cushion leans against the support frame, the sofa bed is in a sofa state; and
- when the front cushion is turned to a plane continuous with the center cushion, and the back cushion leans against the support frame, the sofa bed is in a recliner state; and
- when the center cushion is pulled out from the support frame, the front cushion and the back cushion are turned over to make the front cushion, the center cushion and the back cushion become a continuous plane, the sofa bed is in a bed state; and
- the method comprises the following steps:
- assembling the cushion assembly to the support frame; and
- adjusting the sofa bed to a required state; and
- using the sofa bed for daily life, work and entertainment.

The terms “invention,” “the invention,” “this invention” and “the present invention” used in this patent are intended to refer broadly to all of the subject matter of this patent and the patent claims below. Statements containing these terms should be understood not to limit the subject matter described herein or to limit the meaning or scope of the patent claims below. Embodiments of the invention covered by this patent are defined by the claims below, not this summary. This summary is a high-level overview of various embodiments of the invention and introduces some of the concepts that are further described in the detailed description section below. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used in isolation to determine the scope of the claimed subject matter. The subject matter should be understood by reference to appropriate portions of the entire specification of this patent, any or all drawings and each claim.

BRIEF DESCRIPTION OF DRAWINGS

In order to explain the technical solution of this application more clearly, the drawings needed in the implementation will be briefly introduced below. Obviously, the drawings described below are only some implementations of this application. For those skilled in the art, other drawings can be obtained according to these drawings without creative work.

FIG. 1 is a schematic diagram of a sofa bed in the application of the present invention;

FIG. 2 is an exploded view of the sofa bed in the application of the present invention;

FIG. 3 is a schematic diagram of a support frame in the application of the present invention;

FIG. 4 is a schematic diagram of a support frame in the application of the present invention;

FIG. 5 is a schematic diagram of a support frame in the application of the present invention;

FIG. 6 is a schematic connection diagram of the support frame and the cushion assembly in the application of the present invention;

FIG. 7 is an enlarged view at A in FIG. 6 ;

FIG. 8 is a schematic view of the cushion assembly in the application of the present invention;

FIG. 9 is an enlarged view at B in FIG. 8 ;

FIG. 10 is a schematic diagram of a sofa bed in the application of the present invention;

FIG. 11 is an enlarged view at C in FIG. 10 ;

FIG. 12 is a schematic diagram of the connection between the fastener and the cross bar;

FIG. 13 is a schematic diagram of the connection between the center cushion and the back cushion in the application of the present invention;

FIG. 14 is an enlarged view at D in FIG. 13 ;

FIG. 15 is a schematic diagram of the sofa state in the application of the present invention;

FIG. 16 is a schematic diagram of the state of the recliner in the application of the present invention;

FIG. 17 is a schematic diagram of the bed state in the application of the present invention.

In the figures: Cushion assembly (1000); Front cushion (1100); Center cushion (1200); Fastener (1210); Opening (1220); Support feet (1230); Support (1240); Baffle plate (1250); Fastener (1260); Back cushion (1300); Foldable feet (1310); Support frame (2000); Back plate (2100); Side plate (2200); Cross bar (2300); Support rod (2400); Reinforcing rod (2500); Storage space (2600); Bed foot (2700).

DESCRIPTION OF EMBODIMENTS

In describing the preferred embodiments, specific termi-nology will be resorted to for the sake of clarity. It is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar purpose.
While various aspects and features of certain embodiments have been summarized above, the following detailed description illustrates a few exemplary embodiments in further detail to enable one skilled in the art to practice such embodiments. Reference will now be made in detail to embodiments of the inventive concept, examples of which are illustrated in the accompanying drawings. The accompanying drawings are not necessarily drawn to scale. The described examples are provided for illustrative purposes and are not intended to limit the scope of the invention. It should be understood, however, that persons having ordinary skill in the art may practice the inventive concept without these specific details.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first attachment could be termed a second attachment, and, similarly, a second attachment could be termed a first attachment, without departing from the scope of the inventive concept.
It will be understood that when an element or layer is referred to as being “on,” “coupled to,” or “connected to” another element or layer, it can be directly on, directly coupled to or directly connected to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being “directly on,” “directly coupled to,” or “directly connected to” another element or layer, there are no intervening elements or layers present. Like numbers refer to like elements throughout. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items.
As used in the description of the inventive concept and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates other.
As a preferred embodiment of the application of the present invention, in order to make the sofa bed have multiple use modes, be flexible, light and occupy small space, at the same time, the sofa bed is simple and light in structure, easy to assemble and convenient to use. The present invention provides a flexible and portable sofa bed.
Referring to FIG. 1 , a sofa bed includes a cushion assembly 1000 and a support frame 2000.
Referring to FIGS. 2 to 5 , the support frame 2000 includes a back plate 2100 and side plates 2200, wherein the number of the side plates 2200 is two, and the number of the back plates 2100 is one, and the side plates 2200 and the back plate 2100 together form a rectangular structure with a gap.
In some embodiments (not shown in the figure), the number of the side plates 2200 and the back plate 2100 can also be other quantitative characteristics, as long as it can form a sofa-shaped structure.
Referring to FIGS. 4 and 5 , the support frame 2000 includes two cross bars 2300, which are arranged parallel to the back plate 2100, and the two cross bars 2300 are also arranged parallel to each other, and the two cross bars 2300 are fixed between the two side plates 2200 by threaded connection.
Further, both side plates 2200 are provided with two support rods 2400, which are fixed on the side plates 2200 through threads, and the support rods 2400 are configured to support the cushion assembly 1000.
In some embodiments (not shown in the figure), the number of the support rods 2400 can also be one, three or other quantitative characteristics.
Further, a reinforcing rod 2500 is connected between the two cross bars 2300, which is located below the cross bars 2300. The reinforcing rod 2500 has an incomplete trapezoidal structure, that is, the reinforcing rod 2500 has an equilateral trapezoid structure without a bottom, and the two hypotenuses of the reinforcing rod 2500 are connected to the two cross bars 2300 by threads respectively.
Further, referring to FIG. 5 , the cross bar 2300, the support bar 2400 and the reinforcing rod 2500 together define a storage space 2600, which is configured to store articles.
Further, referring to FIG. 6 , the cushion assembly 1000 is arranged in a rectangular structure with a gap formed by the back plate 2100 and the side plate 2200, and the side plate 2200 defines the turning and sliding trajectory of the cushion assembly 1000, that is, the cushion assembly 1000 can only slide and turn in a direction parallel to the side plate 2200. The side plate 2200 extends upward and is higher than the cushion assembly 1000, and the side plate 2200 is configured to serve as an armrest of the sofa bed or a guardrail of the sofa bed.
Referring to FIG. 7 , the cushion assembly 1000 is connected with the support frame 2000 through a fastener 1210. Referring to FIG. 8 , the cushion assembly 1000 is provided with a front cushion 1100, a center cushion 1200 and a back cushion 1300 in the longitudinal direction, and the fastener 1210 is arranged on the center cushion 1200 through threaded connection.
Referring to FIGS. 6 to 9 , the fastener 1210 has an opening 1220, and the size of the opening 1220 is consistent with the thickness of the support rod 2400, so that the center cushion 1200 can be detachably fastened to the support rod 2400 through the fastener 1210.
Referring to FIGS. 8 and 12 , a fastener 1260 is arranged below the center cushion 1200. When the sofa bed is in the sofa state, the fastener 1260 will be buckled on the cross bar 2300 to fix the sofa bed. Since there are two cross bars 2300, the fastener 1260 is fastened on the cross bar 2300 far away from the back plate 2100.
Referring to FIG. 10 , the center cushion 1200 has support feet 1230, and the support frame 2000 has bed foot 2700. Both the support feet 1230 and the bed foot 2700 are in contact with the ground to jointly support the sofa bed.
Further, the front cushion 1100 is hinged with the center cushion 1200, and the front cushion 1100 can be turned over relative to the center cushion 1200, be in the same plane with the center cushion 1200 or overlap with the center cushion 1200. When the sofa bed is in the sofa state, the front cushion 1100 is folded on the center cushion 1200, and the front cushion 1100 and the center cushion 1200 completely overlap.
Further, the front cushion 1100 has a turning angle of not less than 180 degrees, and when the sofa bed is in a recliner state, the front cushion 1100 turns to be in the same parallel plane with the center cushion 1200.
Referring to FIG. 10 , the front cushion 1100 has foldable feet 1310 with a folding angle of not less than 90 degrees, and the foldable feet 1310 are accommodated in the front cushion 1100 when the sofa bed is in the sofa state; and when the sofa bed is in a recliner state, the foldable feet 1310 are in contact with the ground.
Further, the back cushion 1300 is fixed between two side plates 2200 by threaded connection, and the back cushion 1300 is hinged with the side plates 2200. When the sofa bed is in the sofa state or the recliner state, the back cushion 1300 is attached to the back plate 2100 in an inclined state to form a backrest and support the back of the user.
Referring to FIG. 10 to FIG. 14 , one end of the center cushion 1200 is provided with a support 1240, which is Z-shaped, and the support 1240 is fastened to the center cushion 1200 by threads. When the sofa bed is in the bed state, the back cushion 1300 is turned over and attached to the support 1240, and the front cushion 1100, the center cushion 1200 and the back cushion 1300 are in the same parallel plane.
As shown in FIG. 8 , the front of the center cushion 1200 is detachably connected with a baffle plate 1250 through threads, and a support feet 1230 is arranged behind the baffle plate 1250. The support feet 1230 and the baffle plate 1250 are designed to tightly attached to each other, that is, the support feet 1230 and the baffle plate 1250 are fitted together after assembly.
In this embodiment, the sofa bed is made of an iron frame and has a square structure. In some embodiments (not shown in the figure), the shape of the sofa bed can be a diamond structure, a polygonal structure, a geometric structure such as an oval structure, or other curved edge structures and irregular graphic structures.
In another embodiment (not shown), the side plate 2200 is sewn with a cloth bag, which is configured to store articles. At the same time, the four corners of the bottom of the sofa bed are provided with pulleys which are detachably connected with the sofa bed.
Referring to FIG. 1 to FIG. 17 , as another preferred embodiment of the present application, the present application further provides a method of using a sofa bed to realize daily life, work and entertainment, which requires the use of a flexible and portable sofa bed provided by the present application.
When the sofa bed needs to be used, it is necessary to fix the back plate 2100 and the side plate 2200 with the cross bar 2300 and the support bar 2400 through threaded connection, so that the sofa bed has a rectangular frame structure. Then, bed foot 2700 and reinforcing rod 2500 are respectively installed under the side plates 2200 and the cross bars 2300 to further consolidate the frame structure, thus completing the assembly of the support frame 2000.
Secondly, the cushion assembly 1000 is assembled to the support frame 2000 through the fastener 1210, thus completing the assembly of the sofa bed. During use, the sofa bed has three working states that can be converted.
When the sofa bed needs to be adjusted to the sofa state, as shown in FIG. 15 , the back cushion 1300 is tilted against the support frame 2000 to form a backrest, and there is a certain inclination angle between the back cushion 1300 and the support frame 2000. In other embodiments, the user can adjust the inclination angle between the back cushion 1300 and the support frame 2000 according to his own needs. Subsequently, the front cushion 1100 is folded on the center cushion, and the front cushion 1100 can completely overlap with the center cushion 1200. At this time, the front cushion 1100 and the center cushion 1200 become seat cushions in a sofa state, and the front cushion 1100 and the center cushion 1200 can store articles through the storage space 2600.
When it is necessary to adjust the sofa bed to the recliner state, as shown in FIG. 16 , the back cushion 1300 is tilted against the support frame 2000 to form a backrest, and there is a certain inclination angle between the back cushion 1300 and the support frame 2000. In other embodiments, the user can adjust the inclination angle between the back cushion 1300 and the support frame 2000 according to his own needs. Subsequently, the front cushion 1100 is turned over 180 degrees, so that the front cushion 1100 and the center cushion 1200 are in a continuous plane, that is, the front cushion 1100 and the center cushion 1200 are in the same horizontal plane. Thus, the user can recline on the sofa bed. At this time, the front cushion 1100 can support the user's legs, the center cushion 1200 becomes a seat cushion, and the storage space 2600 is located below the center cushion 1200.
In this embodiment, when it is necessary to adjust the sofa bed to the bed state, as shown in FIG. 17 , it is necessary to first turn the front cushion 1100 to a continuous plane with the center cushion 1200, and then pull the center cushion 1200 out of the support frame 2000, and the center cushion 1200 can slide along the support rod 2400. After the center cushion 1200 is pulled out, the back cushion 1300 is turned over. At this time, the back cushion 1300 does not need to lean on the support frame 2000. At this time, the front cushion 1100, the center cushion 1200 and the back cushion 1300 become continuous planes, that is, the front cushion 1100, the center cushion 1200 and the back cushion 1300 are in the same horizontal plane, and the storage space 2600 is located below the back cushion 1300.
In other embodiments (not shown in the figure), the center cushion 1200 can be pulled out from the support frame 2000 first, and the center cushion 1200 can slide along the support rod 2400. After the center cushion 1200 is pulled out, the front cushion 1100 and the back cushion 1300 are turned over respectively, so that the front cushion 1100, the center cushion 1200 and the back cushion 1300 become a continuous plane, and the storage space 2600 is located below the back cushion 1300.
When the sofa bed is adjusted to the required state, you can start your daily life, work and entertainment on the sofa bed.
When the sofa bed is used, all parts of the sofa bed can be disassembled. All parts are directly and detachably connected by threads. Therefore, after use, each component can be disassembled separately for storage.
To sum up, the sofa bed provided by the application of the present invention has the characteristics of simple and light structure, and the working state of the sofa bed can be changed by pulling the center cushion 1200 and turning over the front cushion 1100 and the back cushion 1300. Users can well control the structure of the product through simple actions such as pulling and turning, so that the sofa bed can be changed between the sofa state, the recliner state or the bed state, so that the sofa bed has the characteristics of convenient use and multifunctional mode, and the user experience is further improved.
In this embodiment, the behaviors that can be used for daily life, work and entertainment include but are not limited to the following: diet, such as dining, etc.; rest: such as sleeping and reading; office: such as using computers to handle work affairs and attend meetings; study: such as reading professional books and writing reports; creation: such as painting and writing; socialization: such as gathering with friends, family dinners, etc.; games: such as playing board games and video games; these behaviors can be carried out on the sofa bed, making the sofa bed an important tool for daily life, work and entertainment. For example, the user can put a computer on the sofa bed for work and can also put food on the sofa bed for dinner and may also play chess and other entertainment activities on the sofa bed.
In this embodiment, the frame of the sofa bed is made of metallic iron, which has the following advantages: good heat resistance: metallic iron is not easy to burn and can withstand higher temperatures; high mechanical strength: metallic iron has high mechanical strength, which makes the frame more stable and durable; good durability: metallic iron is not easy to age and has long service life; fire-proof, moisture-proof and antimagnetic: the metal iron plate has good fire-proof, moisture-proof and antimagnetic properties; environmental protection: metallic iron is a reusable resource product with little impact on the ecological environment; good dimensional stability: metallic iron has good dimensional stability and is not easily affected by temperature and humidity changes; easy to clean and maintain: the metal iron surface is smooth and easy to clean and maintain; various shapes: metal iron can be made into frames of various shapes and styles through various processing technologies.
Further, all parts of the sofa bed are detachably connected and fixed through nuts. Using nuts to connect sofa bed parts has the following advantages: it is convenient to assemble and disassemble: the connection mode of nuts can be easily assembled and disassembled, which is very useful for furniture that needs to move or replace parts frequently; the structure is firm and reliable: the connection mode of nuts can provide a firm and reliable connection, which makes the furniture more stable; lower cost: compared with other connection methods, the nut connection method has lower cost; increasing the pre-tightening force to prevent loosening: the connection mode of nuts can increase the pre-tightening force and prevent the joint from loosening; not causing the phase change of the material composition at the joint: the connection mode of the nut will not cause the phase change of the material composition at the joint; strong adaptability: the connection mode of nut is suitable for all kinds of materials and designs.
In other embodiments (not shown in the figure), the frame of the sofa bed can be made of materials including but not limited to solid wood: solid wood is natural in texture, durable and easy to maintain, and common solid wood materials include oak, walnut and cherry; composite board: a composite board is made of multiple layers of wood, which has good stability and wear resistance; dense board: a dense board is made of wood fiber, with smooth surface, suitable for painting and veneering; fire-proof board: a fire-proof board has good fire-proof performance, and the surface can be decorated in various ways; steel wood: steel wood combines the advantages of metal and wood, which is both stable and has the warmth of wood.
In other embodiments (not shown in the figure), the parts of the sofa bed can also be connected in the following ways, for example: tenon-mortise joint: this is a traditional woodworking connection method, and the parts can be fixed through the precise matching of tenon and mortise; nail joint: this way is to connect parts together through nails, which is simple and fast; glue bonding: this method is to bond parts together by glue, which is suitable for all kinds of materials, but it needs to wait for the glue to dry; wood screw joint: this way is to connect parts together through wood screws, which is suitable for wood and can provide strong connection strength; joining of connectors: this method is to connect the parts together through various special connectors, such as angle metal iron and three-in-one connectors.
In this embodiment, the sofa bed provided by the application of the present invention has the following advantages: flexibility: due to the movable connection between the cushion assembly and the support frame, the sofa bed can easily switch between the sofa state, the recliner state and the bed state, so as to meet different use requirements; portability: this design makes the sofa bed easy to move and store, which is very suitable for the environment where space is limited or needs to be rearranged frequently; independent turnover: the back cushion can be turned independently relative to the center cushion, which increases the flexibility of the sofa bed and enables users to adjust the shape of the sofa bed according to their own comfort; comfort: the front cushion, the center cushion and the back cushion can be a continuous plane, providing a large and flat sleeping space, which is more comfortable than the traditional sofa bed; durability: the design of the support frame makes the sofa bed have good stability and durability, and can withstand the wear and tear in daily use.
In a broad sense, the flexible and portable sofa bed can play a role in various scenes and fields, including but not limited to small-sized houses: for small-sized houses with limited space, the sofa bed can be used as a bed and a sofa, saving space; temporary accommodation: such as dormitory, hotel or short rent apartment, this sofa bed can provide a comfortable rest and sleeping space, and can be folded up when not needed to increase the activity space; office: this sofa bed can provide a convenient rest place in the office where you need to rest or work overnight; family living room: in the family living room, this sofa bed can be used as a daily sofa, and can be quickly converted into a bed when guests stay overnight; children's room: in the children's room, this sofa bed can be used as a place for children to play and rest, and also as their bed.
The terms “comprising,” “including,” “having,” and the like are synonymous and are used inclusively, in an open-ended fashion, and do not exclude additional elements, features, acts, operations, and so forth. Also, the term “or” is used in its inclusive sense (and not in its exclusive sense) so that when used, for example, to connect a list of elements, the term “or” means one, some, or all of the elements in the list. The use of “adapted to” or “configured to” herein is meant as open and inclusive language that does not foreclose devices adapted to or configured to perform additional tasks or steps. Additionally, the use of “based on” is meant to be open and inclusive, in that a process, step, calculation, or other action “based on” one or more recited conditions or values may, in practice, be based on additional conditions or values beyond those recited. Similarly, the use of “based at least in part on” is meant to be open and inclusive, in that a process, step, calculation, or other action “based at least in part on” one or more recited conditions or values may, in practice, be based on additional conditions or values beyond those recited. Headings, lists, and numbering included herein are for ease of explanation only and are not meant to be limiting.
The various features and processes described above may be used independently of one another or may be combined in various ways. All possible combinations and sub-combinations are intended to fall within the scope of the present disclosure. In addition, certain method or process blocks may be omitted in some implementations. The methods and processes described herein are also not limited to any particular sequence, and the blocks or states relating thereto can be performed in other sequences that are appropriate. For example, described blocks or states may be performed in an order other than that specifically disclosed, or multiple blocks or states may be combined in a single block or state. The example blocks or states may be performed in serial, in parallel, or in some other manner. Blocks or states may be added to or removed from the disclosed examples. Similarly, the example systems and components described herein may be configured differently than described. For example, elements may be added to, removed from, or rearranged compared to the disclosed examples.
The invention has now been described in detail for the purposes of clarity and understanding. However, those skilled in the art will appreciate that certain changes and modifications may be practiced within the scope of the appended claims.
Conditional language used herein, such as, among others, “can,” “could,” “might,” “may,” “e.g.,” and the like, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain examples include, while other examples do not include, certain features, elements, and/or steps. Thus, such conditional language is not generally intended to imply that features, elements and/or steps are in any way required for one or more examples or that one or more examples necessarily include logic for deciding, with or without author input or prompting, whether these features, elements and/or steps are included or are to be performed in any particular example.

Claims

What is claimed is:

1. A flexible and portable sofa bed, comprising a cushion assembly and a support frame; and

wherein, said cushion assembly is provided with a front cushion, a center cushion and a back cushion along a longitudinal direction, wherein one ends of said front cushion and said center cushion are foldable connected, and said back cushion can be independently turned relative to said center cushion; and

wherein, said center cushion is connected with said support frame in a sliding way, said back cushion is connected with said support frame in a rotating way, and movable connection of said cushion assembly and said support frame enables said sofa bed to change a working state; and

when said front cushion is folded on said center cushion and said back cushion leans against said support frame, said sofa bed is in a sofa state; and

when said front cushion is turned to a plane continuous with said center cushion, and said back cushion leans against said support frame, said sofa bed is in a recliner state; and

when said center cushion is pulled out from said support frame, said front cushion and said back cushion are turned over to make said front cushion, said center cushion and said back cushion become a continuous plane, said sofa bed is in a bed state.

2. The sofa bed according to claim 1, wherein said support frame comprises a back plate and a side plate; and said back plate and said side plate are arranged around said cushion assembly and said side plate defines a turning and sliding track of said cushion assembly.

3. The sofa bed according to claim 2, wherein said support frame comprises two cross bars, and said two cross bars are arranged in parallel, and a number of said side plate is two, and said two cross bars are fixed between two said side plate through threaded connection.

4. The sofa bed according to claim 3, wherein said side plates are all provided with support rods which are fixed on said side plates through threads and said support rods are configured to support said cushion assembly, and a number of said support rods is two.

5. The sofa bed according to claim 4, wherein a reinforcing rod is connected between said two cross bars and said reinforcing rod is located below said cross bars; and said reinforcing rod is in an incompletely closed trapezoidal structure, and said cross bars, said support rods and said reinforcing rod jointly define a storage space, and said storage space is configured to store articles.

6. The sofa bed according to claim 5, wherein said center cushion is fixed with a fastener through threaded connection, and said fastener is arranged far away from said front cushion; and said fastener has an opening, a size of which is consistent with a thickness of said support rods, so that said center cushion can be detachably fastened on said support rods through said fastener.

7. The sofa bed according to claim 6, wherein said center cushion has support feet, and said support frame has bed feet; and both of said support feet and said bed feet are in contact with ground to jointly support said sofa bed.

8. The sofa bed according to claim 7, wherein said front cushion is hinged with said center cushion, and when said sofa bed is in said sofa state, said front cushion is folded on said center cushion, and said front cushion is completely overlapped with said center cushion.

9. The sofa bed according to claim 8, wherein said front cushion can be turned over relative to said center cushion, said front cushion has a turning angle of not less than 180 degrees, and when said sofa bed is in a recliner state, said front cushion is turned over to be in a same parallel plane with said center cushion.

10. The sofa bed according to claim 9, wherein said front cushion has foldable feet with a folding angle of not less than 90 degrees, and a fastener is arranged below said center cushion; and when said sofa bed is in said sofa state, said foldable feet are accommodated in said front cushion, and said fastener is fastened and fixed on said cross bar.

11. The sofa bed according to claim 10, wherein said back cushion is fixed between two said side plates through threaded connection and said back cushion is hinged with two said side plates; and when said sofa bed is in said sofa state or said recliner state, said back cushion is attached to said back plate in an inclined state.

12. The sofa bed according to claim 11, wherein one end of said center cushion is provided with a support, and said support is fastened on said center cushion through threads; and when said sofa bed is in said bed state, said back cushion is attached to said support, and said front cushion, said center cushion and said back cushion in a same parallel plane.

13. A flexible and portable sofa bed, comprising a cushion assembly and a support frame; and

wherein, said support frame is provided with a storage space, and said cushion assembly covers said storage space, wherein said center cushion is connected with said support frame in a sliding way, and said back cushion is connected with said support frame in a rotating way; and movable connection of said cushion assembly and said support frame enables said sofa bed to change a working state; and

when said front cushion is folded on said center cushion and said back cushion leans against said support frame, said storage space supports said center cushion, and said sofa bed is in a sofa state; and

when said front cushion is turned to a plane continuous with said center cushion, and said back cushion leans against said support frame, said storage space supports said center cushion, and said sofa bed is in a recliner state; and

when said center cushion is pulled out from said support frame, said front cushion and said back cushion are turned over to make said front cushion, said center cushion and said back cushion become a continuous plane, said storage space supports said back cushion, and said sofa bed is in a bed state.

14. The sofa bed according to claim 13, wherein a left side and a right side of said support frame are provided with side plates, which extend upward and are higher than said cushion assembly and are configured to serve as handrails or guardrails of said sofa bed.

15. The sofa bed according to claim 14, wherein a front of said center cushion is detachably connected with a baffle plate through threads, and support feet are arranged behind said baffle plate, and said support feet and said baffle plate are designed to be tightly attached to each other.

16. The sofa bed according to claim 15, wherein said sofa bed is made of an iron frame in a square structure, and a cloth bag is sewn on said side plates and said cloth bag is configured to store articles; and four corners of bottom of said sofa bed are provided with pulleys which are detachably connected with said sofa bed.

17. A method for realizing daily life, work and entertainment by using a sofa bed, comprising providing a flexible and light sofa bed, wherein said sofa bed comprises a cushion assembly and a support frame; and

when said center cushion is pulled out from said support frame, said front cushion and said back cushion are turned over to make said front cushion, said center cushion and said back cushion become a continuous plane, said sofa bed is in a bed state; and

the method comprises the following steps:

assembling said cushion assembly to said support frame; and

adjusting said sofa bed to a required state; and

using said sofa bed for daily life, work and entertainment.

18. The method according to claim 17, wherein when said sofa bed needs to be adjusted to a sofa state, said back cushion is obliquely attached to said support frame to form a backrest, and an inclination angle of said back cushion can be adjusted by a user; and said front cushion and said center cushion are folded on said center cushion, so that said front cushion and said center cushion become seat cushions, and a lower part of said center cushion can be used for storing articles.

19. The method according to claim 17, wherein when said sofa bed needs to be adjusted to the recliner state, said back cushion is obliquely attached to said support frame to form a backrest, and an inclination angle of said back cushion can be adjusted by a user, and said front cushion is turned over to make said front cushion and said center cushion become a continuous plane, and the lower part of said center cushion can be used for storing articles.

20. The method according to claim 17, wherein when said sofa bed needs to be adjusted to the bed state, it is necessary to first turn over said front cushion to adjust said sofa bed to said recliner state, then pull out said center cushion from said support frame, and turn over said back cushion to make said front cushion, said center cushion and said back cushion become a continuous plane, and the lower part of said back cushion can be used for storing articles.