Sofa bed frame with detachable backrest

Abstract

The utility model relates to the technical field of sofas, in particular to a sofa bed frame with a detachable backrest, which comprises a bottom frame, a backrest frame, an armrest mechanism, a turnover mechanism and a seat cushion frame, the bottom frame is horizontally arranged, the backrest frame is detachably connected above one end of the bottom frame, the armrest mechanism comprises two armrest frames, the two armrest frames are respectively arranged on two sides of the bottom frame, and the turnover mechanism is connected with the seat cushion frame. The cushion frame is located between the two armrest frames, the two sides of the cushion frame are in sliding connection with the two armrest frames respectively, the turnover mechanism comprises two turnover assemblies, one ends of the two turnover assemblies are rotationally connected with the bottom frame, the two turnover assemblies are located between the two armrest frames, the other ends of the turnover assemblies are rotationally connected with one end of the cushion frame, and the other ends of the turnover assemblies are located between the two armrest frames. When the turnover assembly is unfolded or folded, the cushion frame horizontally moves along the armrest frame. According to the utility model, the backrest frame can be conveniently and independently detached to be cleaned or replaced, the operation difficulty is simplified, backrest frames with different heights can be conveniently replaced, and the use convenience and flexibility are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sofa technical field especially is a detachable sofa bed frame of backrest. BACKGROUND

[0002] With the acceleration of modern life rhythm and the increasingly nervous living space, the multifunctionalization of furniture has become a trend. Especially in the limited living area, the furniture capable of realizing multiple function conversion is more and more favored by consumers. The sofa bed as a typical multifunctional furniture can be used as a sofa in the daytime, and can be quickly converted into a bed in the evening, greatly improving the space utilization and the convenience of life.

[0003] However, the existing sofa bed still has some deficiencies in the actual use process. For example, the structure of the traditional sofa bed is relatively fixed, and the backrest part is often designed integrally with the base, which leads to inconvenient cleaning and difficulty in adjusting the height or style of the backrest according to individual needs. In addition, the unfolding and folding process of the sofa bed usually requires a large operating force, which is not friendly to the elderly, children or users with less strength. At the same time, in the conversion process of the sofa bed, there is a lack of effective supporting and positioning mechanism, which easily causes inconvenience in use and even safety hazards. SUMMARY

[0004] The utility model provides a detachable sofa bed frame of backrest for the prior art's problem, makes the backrest frame convenient individually dismounts and carries out cleaning or replacement, simplifies operation difficulty, is convenient for replacing the backrest frame of different height, improves use convenience and flexibility.

[0005] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0006] The utility model provides a detachable sofa bed frame of backrest, it includes the bottom frame, backrest frame, armrest mechanism, turnover mechanism and cushion frame, the bottom frame is horizontally arranged, the backrest frame is detachably connected on the top of one end of the bottom frame, the armrest mechanism includes two armrest frames, two armrest frames are respectively installed on both sides on the bottom frame, the cushion frame is located between two armrest frames, both sides of the cushion frame are slidably connected with two armrest frames respectively, the turnover mechanism includes two turnover assemblies, one end of two turnover assemblies is rotatably connected with the bottom frame, two turnover assemblies are located between two armrest frames, the other end of the turnover assembly is rotatably connected with one end of the cushion frame, when the turnover assembly unfolds or folds, the cushion frame moves horizontally along the armrest frame, thereby approaching or moving away from the bottom frame.

[0007] The two arm ends of the armrest frame are fixedly connected to the middle part of the bottom frame.

[0008] The turnover assembly comprises a first connecting rod, a second connecting rod and a third connecting rod.

[0009] The inner side of the armrest frame is provided with a horizontal sliding groove, and the two sides of the cushion frame are provided with pulleys.

[0010] The first connecting rod is abutted against the limiting rod when the first connecting rod rotates around the bottom frame towards the backrest frame and is in a horizontal state.

[0011] The other end of the cushion frame is rotatably provided with a plurality of casters below.

[0012] The multifunctional sofa bed frame further comprises a first cross rod and a driving mechanism.

[0013] The multifunctional sofa bed frame further comprises the second cross rod.

[0014] The backrest frame comprises a wall abutting part and a load bearing part.

[0015] The bottom frame and the load bearing part are located on the same side of the wall abutting part and are oppositely arranged.

[0016] The utility model discloses the following beneficial effects:

[0017] The backrest frame is detachably connected to the top of one end of the base frame, so that the backrest frame is conveniently detached for cleaning or replacement, operation difficulty is simplified, backrest frames of different heights are conveniently replaced, and use convenience and flexibility are improved; the base frame and the bearing part form a storage interval, which can be used for storing a soft pad; the two turnover assemblies are located between the two armrest frames, and the turnover assemblies are not connected with the armrest frames, so that structural independence of the turnover assemblies is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 A structure schematic view of a detachable backrest sofa bed frame in a contraction state of the utility model.

[0019] Fig. 2 A structure schematic view of a detachable backrest sofa bed frame in an opening state of the utility model.

[0020] Fig. 3 A partial structure exploded view of a detachable backrest sofa bed frame in the utility model. Figs. 1-3 The reference signs in the drawings include:

[0021] 1, base frame; 2, backrest frame; 3, cushion frame; 4, armrest frame; 5, turnover assembly; 6, first connecting rod; 7, second connecting rod; 8, third connecting rod; 9, horizontal sliding groove; 10, pulley; 11, limiting rod; 12, trundle; 13, first horizontal rod; 14, driving mechanism; 15, second horizontal rod; 16, wall abutting part; 17, bearing part; 18, assembling part; 19, plug-in groove; 20, first connecting hole; 21, second connecting hole; 22, guide rail; 23, sliding part. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] In the description of the utility model, it should be explained that the terms "vertical direction", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] It should be further understood that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0025] As shown in Figs. 1-3 A detachable sofa bed frame of backrest, it includes bottom frame 1, backrest frame 2, armrest structure, turnover mechanism and cushion frame 3, the bottom frame 1 is horizontally arranged, the backrest frame 2 is detachably connected on the top of one end of the bottom frame 1, the armrest structure includes two armrest frames 4, two armrest frames 4 are respectively arranged on the two sides of the bottom frame 1, the cushion frame 3 is located between two armrest frames 4, the two sides of the cushion frame 3 are respectively slidably connected with two armrest frames 4, the turnover mechanism includes two turnover assemblies 5, one end of two turnover assemblies 5 is rotatably connected with the bottom frame 1, two turnover assemblies 5 are located between two armrest frames 4, the other end of the turnover assembly 5 is rotatably connected with one end of the cushion frame 3, when the turnover assembly 5 is unfolded or folded, the cushion frame 3 moves horizontally along the armrest frame 4, so as to approach or away from the bottom frame 1;Wherein, the multifunctional sofa bed frame further includes first cross bar 13 and driving mechanism 14, two ends of the first cross bar 13 are respectively connected to the two sides of the bottom frame 1;The driving mechanism 14 is used to drive the cushion frame 3 to move horizontally along the armrest frame 4, the driving mechanism 14 can adopt linear motor, or it can include driver, guide rail 22 and sliding block, the guide rail 22 is arranged in the middle of the cushion frame 3, the sliding block is arranged on the first cross bar 13, the sliding block is slidably arranged on the guide rail 22, and the driver is used to drive the sliding block to reciprocate on the guide rail 22;When folding or unfolding, the driving mechanism 14 is started, the cushion frame 3 moves horizontally along the armrest frame through the turnover mechanism, so as to approach or away from the bottom frame 1 and the backrest frame 2, the contraction and expansion of the sofa bed frame are realized, and the dual functions of the sofa bed frame that can be sat and can be laid are achieved.

[0026] Specifically, the backrest frame 2 is detachably connected above one end of the base frame 1, so that the backrest frame 2 can be conveniently detached for cleaning or replacement, simplifying the operation difficulty, facilitating replacement of backrest frames 2 of different heights, and improving the use convenience and flexibility. In this embodiment, the base frame 1 is a rectangular frame arranged horizontally. The backrest frame 2 includes a wall-lying part 16 and a load-bearing part 17. The lower end of the wall-lying part 16 is detachably connected to the base frame 1, and the upper end of the wall-lying part 16 is fixedly connected to the load-bearing part 17 perpendicularly. One end of the base frame 1 and the load-bearing part 17 are located on the same side of the wall-lying part 16 and arranged oppositely. The wall-lying part 16 is two long pipes, and one end of each of the two long pipes is detachably connected above two ends of one side of the base frame 1 for abutting against a wall. The load-bearing part 17 is a rectangular frame with a width smaller than that of the base frame 1 and is arranged horizontally. Two ends of one side of the load-bearing part 17 are fixedly connected to the ends of the two long pipes away from the base frame 1, and the other side of the load-bearing part 17 is located above the base frame 1. In this embodiment, a receiving interval is formed between the base frame 1 and the load-bearing part 17, which can be used to receive a soft cushion. In other embodiments, the load-bearing part 17 is a horizontal pipe fixedly connected to the two long pipes of the wall-lying part 16. In another embodiment, the load-bearing part 17 is any other shaped frame, and one side of the frame is fixedly connected to the two long pipes of the wall-lying part 16, and the frame as a whole is located above the base frame 1. The two turnover assemblies 5 are located between the two armrest frames 4, and the turnover assembly 5 has no connection relationship with the armrest frame 4, thereby ensuring the structural independence of the turnover assembly 5.

[0027] The embodiment of the present application enables the backrest frame 2 to be individually detached, cleaned or replaced as needed. At the same time, a reliable turnover mechanism and driving device are provided to facilitate users to easily complete the function conversion from a sofa to a bed. In addition, considering the stability and safety during long-term use, the new type of sofa bed also needs to have good structural strength and load-bearing capacity to ensure stable support in various use states.

[0028] In the embodiment of the present application, two assembly parts 18 are arranged on both sides of one end of the base frame 1. The assembly part 18 is provided with a plug-in slot 19, and the lower end of the wall-lying part 16 is inserted into the plug-in slot 19. Since the wall-lying part 16 is two long pipes, one end of each of the two long pipes is detachably connected into the plug-in slot 19 of the two assembly parts 18. The two sides of the assembly part 18 are respectively provided with a first connecting hole 20, the first connecting hole 20 is in communication with the plug-in slot 19, the lower end of the wall-lying part 16 is respectively provided with a second connecting hole 21 on both sides, and the first connecting hole 20 and the second connecting hole 21 are correspondingly arranged. Specifically, under the above arrangement, the first connecting hole 20 and the second connecting hole 21 are matched and locked by assembling external screws, and the plug-in slot 19 can be used for positioning the long pipes, thereby facilitating the quick assembly and disassembly of the long pipes.

[0029] In the embodiment of the present application, the armrest frame 4 is arranged in an inverted U shape in the vertical plane, one arm end of the two armrest frames 4 is fixedly connected to the middle part of the base frame 1, and the other arm end of the armrest frame 4 is fixedly connected to the other end of the base frame 1. Specifically, the armrest frame 4 is integrally connected between the middle part of the base frame 1 and the other end of the base frame 1, and the armrest frame 4 is arranged on the base frame 1 as a whole, so that the structure is stable and the overall structural strength is high.

[0030] In the embodiment of the present application, the turnover assembly 5 comprises a first connecting rod 6, a second connecting rod 7 and a third connecting rod 8, one end of the first connecting rod 6 is rotationally connected to the middle part of the base frame 1, one end of the second connecting rod 7 is rotationally connected to the other end of the first connecting rod 6, the other end of the second connecting rod 7 is rotationally connected to one end of the third connecting rod 8, and the other end of the third connecting rod 8 is rotationally connected to one end of the seat cushion frame 3. The inner side of the armrest frame 4 is provided with a horizontal sliding groove 9, and the seat cushion frame 3 is provided with a pulley 10 on both sides, and the pulley 10 is rotationally arranged in the horizontal sliding groove 9. Specifically, a drive is fixedly arranged below the seat cushion frame 3, and is used to drive the guide rail 22 to slide on the sliding member 23; when the drive is started, the guide rail 22 moves relative to the sliding member 23 and drives the seat cushion frame 3 to move horizontally along the horizontal sliding groove 9, so that the sofa bed frame is retracted or unfolded; the sofa seat of the present application has two states: a retracted state and an unfolded state. When the sofa bed frame is in the retracted state, the pulley 10 slides to the end of the sliding groove close to the base frame 1, the first connecting rod 6 abuts against the limiting rod 11, and is in a horizontal state, the second connecting rod 7 is generally in a vertical state, and the seat cushion frame 3 close to one end of the base frame 1 is located above the base frame 1; the sofa bed frame realizes the seat function. The drive is started and runs forward, the guide rail 22 slides on the sliding member 23 and drives the seat cushion frame 3 to move horizontally, the pulley 10 slides to the end of the sliding groove away from the base frame 1, the third connecting rod 8 and the first connecting rod 6 rotate towards the direction away from the backrest frame 2, until the third connecting rod 8 and the second connecting rod 7 are in a horizontal state, and the seat cushion frame 3 close to one end of the base frame 1 is located above the first horizontal rod 13. The sofa bed frame is lengthened, the soft cushion stored in the storage interval is moved to between the base frame 1 and the seat cushion frame 3, and the reclining chair function is realized.

[0031] In the embodiment of the present application, the base frame 1 is provided with a limiting rod 11, when the first connecting rod 6 rotates around the base frame 1 towards the backrest frame 2 and is in a horizontal state, the first connecting rod 6 abuts against the limiting rod 11. Specifically, the limiting rod 11 is transversely arranged on the base frame 1, when the first connecting rod 6 rotates around the middle part of the base frame 1 towards the backrest frame 2, until the first connecting rod 6 abuts against the upper end of the limiting rod 11 and is in a horizontal state, the first connecting rod 6 no longer continues to rotate in this direction.

[0032] In the embodiment of the present application, a plurality of casters 12 are rotatably arranged below the other end of the cushion frame 3. Specifically, the cushion frame 3 is arranged to slide on the ground.

[0033] In the embodiment of the present application, the multifunctional sofa bed frame further comprises the second horizontal rod 15, two ends of the second horizontal rod 15 are respectively and perpendicularly connected with the opposite two sides of the cushion frame 3, and the second horizontal rod 15 is perpendicularly arranged with the guide rail, so as to strengthen the structural strength of the cushion frame 3 and improve the bearing capacity of the cushion frame 3 to the driving mechanism 14.

[0034] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiment within the scope of the present application are all within the scope of the present application.

Claims

1. A sofa bed frame with a detachable backrest, characterized in that: The device includes a base frame, a backrest frame, an armrest mechanism, a flipping mechanism, and a seat cushion frame. The base frame is horizontally positioned. The backrest frame is detachably connected to one end of the base frame. The armrest mechanism includes two armrest frames, which are respectively mounted on both sides of the base frame. The seat cushion frame is located between the two armrest frames, and both sides of the seat cushion frame are slidably connected to the two armrest frames. The flipping mechanism includes two flipping components, one end of which is rotatably connected to the base frame and located between the two armrest frames. The other end of each flipping component is rotatably connected to one end of the seat cushion frame. When the flipping components are unfolded or folded, the seat cushion frame moves horizontally along the armrest frames, thereby moving closer to or further away from the base frame.

2. The detachable backrest sofa bed frame according to claim 1, characterized in that: The handrails are arranged in an inverted U-shape on the vertical plane. One arm of each handrail is fixedly connected to the middle of the base frame, and the other arm of each handrail is fixedly connected to the other end of the base frame.

3. A detachable backrest sofa bed frame according to claim 1, characterized in that: The flipping assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. One end of the first connecting rod is rotatably connected to the middle of the base frame. One end of the second connecting rod is rotatably connected to the other end of the first connecting rod. The other end of the second connecting rod is rotatably connected to one end of the third connecting rod. The other end of the third connecting rod is rotatably connected to one end of the seat cushion frame.

4. A detachable backrest sofa bed frame according to claim 1, characterized in that: The armrest frame has a horizontal sliding groove on its inner side, and the seat cushion frame has pulleys on both sides, with the pulleys rotatably mounted on the horizontal sliding groove.

5. A detachable backrest sofa bed frame according to claim 3, characterized in that: The base frame is provided with a limit rod. When the first connecting rod rotates around the base frame toward the backrest and is in a horizontal state, the first connecting rod abuts against the limit rod.

6. A detachable backrest sofa bed frame according to claim 1, characterized in that: Several casters are rotatably mounted on the other end of the seat frame.

7. A detachable backrest sofa bed frame according to claim 1, characterized in that: The sofa bed frame also includes a first crossbar and a drive mechanism. The two ends of the first crossbar are respectively connected to the two sides of the base frame. The drive mechanism is used to drive the seat cushion frame to move horizontally along the armrest frame.

8. A detachable backrest sofa bed frame according to claim 1, characterized in that: The sofa bed frame also includes a second crossbar, the two ends of which are respectively fixed perpendicularly to the opposite sides of the cushion frame.

9. A detachable backrest sofa bed frame according to claim 1, characterized in that: The backrest includes a wall-mounted part and a load-bearing part. The lower end of the wall-mounted part is detachably connected to the base frame, and the upper end of the wall-mounted part is vertically fixedly connected to the load-bearing part. The base frame and the load-bearing part are located on the same side of the wall-mounted part and are arranged opposite to each other.

10. A detachable backrest sofa bed frame according to claim 9, characterized in that: The base frame is equipped with assembly components on both sides of one end. Each assembly component has an insertion slot. The lower end of the wall-facing part is inserted into the insertion slot. Each side of the assembly component has a first connecting hole that communicates with the insertion slot. Each side of the lower end of the wall-facing part has a second connecting hole that corresponds to the first connecting hole.

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