Deformable sofa bed

Abstract

The utility model discloses a transformable sofa bed. The transformable sofa bed comprises a seat frame, the sofa bed main body is arranged on the seat frame; at least one armrest assembly is movably connected to the side surface of the sofa bed main body; the armrest assembly further comprises a connecting structure used for being connected with the sofa bed body, and the armrest assembly can be driven to be changed into a second state from a first state by changing the connecting structure. In a first state, the armrest assembly is vertically arranged on the side surface of the sofa bed main body; and in the second state, the armrest assembly is horizontally arranged on the side surface of the sofa bed main body. According to the deformable sofa bed, the armrest assemblies can be unfolded from the side direction and combined with the sofa bed main body to form a bed, so that the structure is simple, the conversion mode is easy to operate, and the sofa bed is unfolded from the side direction, so that the occupied space is small, and the use scenes are multiple.

Description

Technical Field

[0001] The present application relates to the field of furniture technology, and in particular to a deformable sofa bed. Background Art

[0002] A sofa bed is a piece of furniture that combines the functions of a sofa and a bed. It has become increasingly popular with consumers in recent years. The design of a sofa bed allows it to be used as a sofa during the day and unfolded into a bed at night, which comes in handy when additional sleeping space is temporarily needed. Currently, most mainstream sofa beds use a pull-out seat cushion type, which means that some of the seat cushions and movable frame are hidden under the sofa cushions. When it is necessary to unfold it into a bed, the hidden seat cushions are pulled out and spliced ​​with the sofa cushions to form a flat surface, thus achieving the transformation from a sofa to a bed. However, sofa beds with pull-out seat cushions also have problems. For example, sofa beds with this type of unfolding method require a more complex structure to store a large mattress under the sofa cushions. Secondly, this type of unfolding method often requires a larger space to unfold into a bed, and its use scenarios are limited. Based on this, there is a need to design a sofa bed with a simple structure and small space occupation. Utility Model Content

[0003] In order to solve at least one of the above technical problems, the present application provides a deformable sofa bed, which adopts a side-expanding method to unfold the armrest assembly of the sofa into a bed. It has a simple structure and multiple usage scenarios. The technical solution adopted is as follows.

[0004] The present application provides a deformable sofa bed, which includes a seat frame; a sofa bed body, wherein the sofa bed body is arranged on the seat frame; an armrest assembly, at least one of which is movably connected to a side surface of the sofa bed body; the armrest assembly also includes a connecting structure for connecting to the sofa bed body, and changing the connecting structure can drive the armrest assembly from a first state to a second state; in the first state, the armrest assembly is vertically arranged on the side surface of the sofa bed body; in the second state, the armrest assembly is horizontally arranged on the side surface of the sofa bed body.

[0005] In certain embodiments of the present application, the sofa bed further comprises a locking structure, which comprises a fixing pin protruding outwardly and provided on the armrest assembly, a locking member and a locking shaft provided on the upper portion of the seat frame, wherein the locking member is sleeved on the locking shaft and can rotate around the locking shaft; the locking member and the fixing pin are connected by a detachable snap-fit ​​connection, and when the armrest assembly is in the first state, the locking member is snap-fitted onto the fixing pin.

[0006] In certain embodiments of the present application, the armrest assembly includes a side panel and a support frame connected under the side panel, the connecting structure includes an armrest link and a transmission link, the transmission link is accommodated in the support frame, the first end of the transmission link is transmission-connected to the first end of the armrest link, the second end of the transmission link extends to the end of the support frame, and the second end of the armrest link is transmission-connected to the sofa bed body or the seat frame.

[0007] In certain embodiments of the present application, a first connecting piece extending outward and a first rotating shaft are provided on the sofa bed body or the seat frame. The first rotating shaft passes through the first connecting piece and the second end of the armrest link, so that the armrest link can rotate relative to the first connecting piece.

[0008] In certain embodiments of the present application, the first end of the armrest link is vertically connected to the second end, and when the armrest assembly is converted from the first state to the second state, the armrest link rotates around the first rotating shaft.

[0009] In certain embodiments of the present application, the armrest assembly further includes a support foot, which is arranged on a side of the armrest assembly opposite to the armrest connecting rod, and the support foot is movably connected to the support frame so that the support foot can be rotated and stored on the inner side of the side panel.

[0010] In certain embodiments of the present application, the first and second ends of the transmission link are first spiral bevel gears, and the first end of the armrest link and the end of the support foot are provided with second spiral bevel gears that mesh with the first spiral bevel gear. The armrest link, the transmission link and the support foot are sequentially connected in transmission, and when the armrest assembly is converted from the first state to the second state, the support foot automatically opens outward from the inner side of the side panel.

[0011] In certain embodiments of the present application, the side of the seat frame facing the armrest assembly is open, and when the armrest assembly is converted from the second state to the first state, the support frame is stored in the seat frame.

[0012] In certain embodiments of the present application, at least one limit block is provided on the transmission connecting rod, the transmission connecting rod passes through the limit block, and the limit block is fixed in the support frame.

[0013] In certain embodiments of the present application, the armrest assemblies are provided on opposite sides of the sofa bed body. When the armrest assembly on one side is transformed from a first state to a second state, the sofa bed is transformed from a sofa into a recliner. When the armrest assemblies on both sides are transformed from the first state to the second state, the sofa bed is transformed from a sofa into a bed.

[0014] The embodiments of the present application have at least the following beneficial effects: the transformable sofa bed of the present application is configured such that the armrest assembly is movably connected to the sofa bed body. In the sofa state, the armrest assembly is arranged on the side of the sofa bed body to provide support or leaning. When it needs to be converted into a bed state, it is only necessary to convert the connection structure between the armrest assembly and the sofa bed body, so that the armrest assembly can be unfolded from the side and combined with the sofa bed body to form a bed. Such a configuration has a simple structure and the conversion method is easy to operate. Moreover, by lateral unfolding of the sofa bed, it takes up less space and has multiple usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The aspects and advantages described and / or attached in the embodiments of the present application will become apparent and easily understood in conjunction with the following drawings. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0016] Figure 1 A schematic structural diagram of a first state of a deformable sofa bed provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 Enlarged view of point C in the middle;

[0018] Figure 3 A schematic structural diagram of a second state of a deformable sofa bed in a single-side unfolded state provided by an embodiment of the present application;

[0019] Figure 4 A schematic structural diagram of a second state of a deformable sofa bed in an embodiment of the present application with both sides unfolded;

[0020] Figure 5 A schematic diagram of the exploded structure of the deformable sofa bed in the second state provided by an embodiment of the present application;

[0021] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0022] Figure 7 for Figure 5 Enlarged view of point B in the middle;

[0023] Figure 8 A schematic diagram of the connection of the armrest connecting rods of the deformable sofa bed provided in an embodiment of the present application.

[0024] Figure numerals: 100, sofa bed; 10, seat frame; 101, first connecting plate; 102, first rotating shaft; 20, sofa bed body; 30, armrest assembly; 301, side panel; 302, support frame; 303, supporting foot; 40, connecting structure; 401, armrest connecting rod; 402, transmission connecting rod; 403, first spiral bevel gear; 404, second spiral bevel gear; 405, limit block; 50, locking structure; 501, fixing pin; 502, locking member; 503, locking rotating shaft. DETAILED DESCRIPTION

[0025] The following combination Figures 1 to 8 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limiting the present application.

[0026] In the description of this application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, "multiple" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] A sofa bed is a piece of furniture that functions as both a sofa and a bed. It can be used as a sofa or unfolded into a bed, making it suitable for modern living spaces and particularly popular in smaller apartments. It accommodates occasional guests while also providing additional sleeping space for smaller apartments. The most common sofa bed now features a pull-out seat cushion, with the mattress concealed beneath. When the bed is needed, the mattress is pulled out and assembled, leaving the space previously occupied by the sofa cushion at the head of the bed. These pull-out sofa beds typically fold in two or three parts to form a bed, requiring considerable space and requiring a complex storage structure for the mattress.

[0029] Based on this, see Figures 1-8 The deformable sofa bed 100 provided in the present application includes a seat frame 10; a sofa bed body 20, the sofa bed body 20 is arranged on the seat frame 10, and the seat frame 10 is fixedly connected to the sofa bed body 20 for supporting the sofa bed body 20; an armrest assembly 30, at least one armrest assembly 30 can be movably connected to the side of the sofa bed body 20; the armrest assembly 30 also includes a connecting structure 40 for connecting to the sofa bed body 20, and the changing connecting structure 40 can drive the armrest assembly 30 to change from a first state to a second state; in the first state, the armrest assembly 30 is vertically arranged on the side of the sofa bed body 20; in the second state, the armrest assembly 30 is horizontally arranged on the side of the sofa bed body 20.

[0030] It can be understood that the so-called first state of the armrest assembly 30, that is, the armrest assembly 30 is upright on the side of the sofa bed body 20. At this time, the armrest assembly 30 and the sofa cushion and backrest of the sofa bed body 20 form a sofa space for the user to sit; the so-called second state of the armrest assembly 30, that is, the armrest assembly 30 is transformed from an upright state to a horizontal state through the movable and deformable connecting structure 40, and the horizontally arranged armrest assembly 30 is flush with the sofa cushion of the sofa bed body 20, forming a bed for the user to lie down.

[0031] The present embodiment provides a transformable sofa bed 100 in which the armrest assembly 30 is movably connected to the sofa bed body 20. In the sofa state, the armrest assembly 30 is arranged on the side of the sofa bed body 20 to provide support or leaning. When it is necessary to convert the sofa into the bed state, it is only necessary to convert the connection structure 40 connecting the armrest assembly 30 and the sofa bed body 20. The armrest assembly 30 can be deployed from the side and combined with the sofa bed body 20 to form a bed. This configuration has a simple structure and an easy-to-operate conversion method. In addition, by lateral deployment of the sofa bed 100, it takes up less space and can be used in a variety of scenarios.

[0032] Exemplarily, the seat frame 10 may include four seat legs for support and a mounting frame for connecting to the sofa bed body 20. The four seat legs are respectively arranged at the four corners of the mounting frame and are respectively fixed to the mounting frame, such as by welding or screws and nuts. When screws are used, the seat legs are detachably connected, which makes the sofa bed 100 smaller and more convenient to carry and store.

[0033] In certain embodiments of this application, see Figure 1-Figure 4 Armrest assemblies 30 are provided on opposite sides of the sofa bed body 20. When the armrest assembly 30 on one side is transformed from a first state to a second state, the sofa bed 100 is transformed from a sofa into a recliner. When the armrest assemblies 30 on both sides are transformed from the first state to the second state, the sofa bed 100 is transformed from a sofa into a bed.

[0034] As can be understood, armrest assemblies 30 are provided on opposite sides of the sofa bed body 20 in the longitudinal direction. When the armrest assemblies 30 on both sides are in the first state, the armrest assemblies 30 on both sides, together with the sofa cushions and backrest of the sofa bed body 20, form a sofa space for the user to sit on. When the armrest assembly 30 on one side is in the first state and the armrest assembly 30 on the other side is in the second state, the sofa bed 100 transforms from a sofa with armrests on both sides into a chaise longue with armrests on only one side. When both armrest assemblies 30 on both sides are in the second state, the armrest assemblies 30 on both sides are flush with the sofa cushions, forming a bed for the user to lie flat. By setting different states of different armrest assemblies 30, the sofa bed 100 can be transformed into various functional forms such as a sofa, a chaise longue, and a bed, expanding the use scenarios of the sofa bed 100.

[0035] Furthermore, the sofa bed body 20 can be a single-seat sofa or a multi-seat sofa. For a single-seat sofa, it is suitable to convert the state of the armrest assembly 30 to transform it into a sofa, a chaise longue or a bed; and for a multi-seat sofa, it is more suitable to convert between a sofa and a chaise longue through the armrest assembly 30, that is, the sofa bed body 20 of the present application does not limit the number of seats on the sofa, and sofa beds 100 with different numbers of seats can apply the solution of the present application.

[0036] In certain embodiments of this application, see Figure 1-Figure 2The sofa bed 100 further includes a locking structure 50, which includes a fixing pin 501 protruding outwardly and provided on the armrest assembly 30, a locking member 502 and a locking shaft 503 provided on the upper portion of the seat frame 10, wherein the locking member 502 is sleeved on the locking shaft 503 and can rotate around the locking shaft 503; the locking member 502 and the fixing pin 501 are connected by a detachable snap-fit ​​connection. When the armrest assembly 30 is in the first state, the locking member 502 is snap-fitted to the fixing pin 501. It can be understood that the fixing pin 501 is arranged on the same side of the locking shaft 503, and the locking shaft 503 is arranged on the upper part of the seat frame 10; when the armrest assembly 30 is in the first state, that is, when the armrest assembly 30 is arranged upright, the position of the fixing pin 501 corresponds to the position of the locking shaft 503. The so-called position correspondence here means that the position of the fixing pin 501 is located around the locking shaft 503, and the fixing pin 501 can be flush with the locking shaft 503 and located on the same horizontal line; the fixing pin 501 can also be below the locking shaft 503, but the distance cannot be too far. In this embodiment, one end of the locking member 502 is sleeved on the locking shaft 503. The locking member 502 is a movable connection that can rotate around the locking shaft 503. The other end is formed into a hook shape and corresponds to the position of the fixing pin 501. When the armrest assembly 30 is in the first state, the locking member 502 is rotated and locked onto the fixing pin 501, thereby fixing the armrest assembly 30 relative to the sofa bed body 20, preventing the armrest assembly 30 from deforming or losing its supporting force during use of the sofa bed 100, thereby causing injury to the user. When the armrest assembly 30 is to be converted from the first state to the second state, it is only necessary to first pull the locking member 502 upward to release the relative fixation between the armrest assembly 30 and the sofa bed body 20, thereby allowing the armrest assembly 30 to deform. In this application, the specific implementation of the locking structure 50 is not limited to the above-mentioned locking member 502, fixing pin 501, etc., and any method that can achieve a snap-fit ​​fixing structure is applicable. The simple locking structure 50 can realize the conversion of the armrest assembly 30 between the fixed and unfolded states. On the other hand, thanks to the simple structure, the user can easily convert the sofa bed 100. A single person can also easily complete the operation with low difficulty.

[0037] In certain embodiments of this application, see Figure 5The armrest assembly 30 includes a side panel 301 and a support frame 302 connected to the side panel 301. The connecting structure 40 includes an armrest link 401 and a transmission link 402. The transmission link 402 is housed in the support frame 302. The first end of the transmission link 402 is transmission-connected to the first end of the armrest link 401. The second end of the transmission link 402 extends to the end of the support frame 302. The second end of the armrest link 401 is transmission-connected to the sofa bed body 20 or the seat frame 10. For example, the support frame 302 may include a hollow frame with a receiving cavity formed therein. The transmission link 402 is housed in the support frame 302. The first end of the transmission link 402 and the first end of the armrest link 401 are provided with a transmission component for cooperating transmission. The second end of the armrest link 401 and the sofa seat frame 10 are also provided with a transmission component for cooperating transmission. When the armrest assembly 30 is converted from the first state to the second state, the armrest link 401 moves downward with its second end as the rotation center, that is, with the second end of the armrest link 401 as the rotation center. Figure 1 For example, when the left armrest assembly 30 transitions from the first state to the second state, the armrest link 401 rotates counterclockwise with its second end as the center of rotation. When the right armrest assembly 30 transitions from the first state to the second state, the armrest link 401 rotates clockwise with its second end as the center of rotation. Simultaneously, the first end of the armrest link 401 is in transmission connection with the transmission link 402, enabling the armrest link 401 to rotate in conjunction with the transition. Connecting the armrest assembly 30 to the sofa bed body 20 via the connection structure 40 allows for flexible rotation of the armrest assembly 30 while maintaining a simple structure.

[0038] Furthermore, the sofa bed body 20 or the seat frame 10 is provided with an outwardly extending first connecting piece 101 and a first rotating shaft 102. The first rotating shaft 102 passes through the first connecting piece 101 and the second end of the armrest link 401, allowing the armrest link 401 to rotate relative to the first connecting piece 101. Exemplarily, the first connecting piece 101 and the first rotating shaft 102 are provided on the seat frame 10 and are located at the upper portion of the seat frame 10. The first connecting piece 101 extends outward relative to the seat frame 10, and the first rotating shaft 102 is provided at an end of the first connecting piece 101 away from the seat frame 10. The first rotating shaft 102 is fixedly connected to the first connecting piece 101, and the first end of the armrest link 401 is movably connected to the first rotating shaft 102. The armrest link 401 can rotate clockwise or counterclockwise around the first rotating shaft 102. In other examples, the first connecting piece 101 and the first rotating shaft 102 can also be provided at the lower portion of the sofa bed body 20. The armrest link 401 is movably connected to the sofa bed body 20 or the seat frame 10 through the first connecting piece 101 and the first rotating shaft 102, which not only provides rotation support and rotation center for the armrest link 401, but also connects the armrest assembly 30 and the sofa bed body 20 through a simple structure.

[0039] In certain embodiments of the present application, the first end of the armrest link 401 is vertically connected to the second end. When the armrest assembly 30 is transformed from the first state to the second state, the armrest link 401 rotates about the first rotation axis 102. It is understood that the length of the first end of the armrest link 401 is greater than the length of the second end. When the armrest assembly 30 is in the first state, the first end of the armrest link 401 is located inside the support frame 302 and is in a vertical state. At this time, the second end of the armrest link 401 is located below the sofa bed body 20. When the armrest assembly 30 is transformed from the first state to the second state, the armrest assembly 30 rotates about the first rotation axis 102, that is, the "L" shape rotates about the end of the short section as the rotation center. The left armrest assembly 30 rotates counterclockwise, and the right armrest assembly 30 rotates clockwise.

[0040] In certain embodiments of the present application, the armrest assembly 30 further includes a support leg 303 disposed on a side of the armrest assembly 30 opposite the armrest link 401. The support leg 303 is movably connected to the support frame 302, allowing the support leg 303 to rotate and be stored inside the side panel 301. It will be appreciated that when the armrest assembly 30 is in a first state, the support leg 303 is stored inside the side panel 301, that is, between the side panel 301 and the sofa bed body 20, and is not exposed. When the armrest assembly 30 is in a second state, the support leg 303 is deployed from the inside of the side panel 301 and disposed perpendicularly to the side panel 301 to support the side panel 301. The provision of the retractable support leg 303 supports the armrest assembly 30 when deployed, thereby increasing the stability and firmness of the sofa bed 100.

[0041] In certain embodiments of the present application, the first and second ends of the transmission link 402 are a first spiral bevel gear 403, and the first end of the armrest link 401 and the end of the support foot 303 are provided with a second spiral bevel gear 404 that meshes with the first spiral bevel gear 403. The armrest link 401, the transmission link 402 and the support foot 303 are connected in sequence. When the armrest assembly 30 is converted from the first state to the second state, the support foot 303 automatically opens outward from the inner side of the side panel 301. As will be appreciated, the armrest link 401, the transmission link 402, and the support leg 303 are sequentially connected by a first spiral bevel gear 403 and a second spiral bevel gear 404. When the armrest link 401 rotates, it drives the second spiral bevel gear 404 on the first end of the armrest link 401 to rotate, thereby driving the transmission link 402 to rotate axially and the first spiral bevel gear 403 on its second end, which ultimately drives the second spiral bevel gear 404 on the support leg 303 to rotate, causing the support leg 303 to automatically deploy from the inside of the side panel 301. By connecting the armrest link 401, the transmission link 402, and the support leg 303 in a transmission manner, the support leg 303 can be linked to the armrest assembly 30 to deploy, making the sofa bed 100 easier to transform.

[0042] In certain embodiments of the present application, the side of the seat frame 10 facing the armrest assembly 30 is open, and when the armrest assembly 30 is converted from the second state to the first state, the support frame 302 is stored in the seat frame 10 .

[0043] In certain embodiments of the present application, at least one stopper 405 is provided on the transmission connecting rod 402. The transmission connecting rod 402 passes through the stopper 405 and is fixed within the support frame 302. It is understood that the support frame 302 is a hollow structure, and the transmission connecting rod 402 is disposed within the support frame 302. When the transmission connecting rod 402 rotates, it may deviate within the support frame 302 or bend under excessive force. The stopper 405, by abutting against the inside of the support frame 302, limits the position of the transmission connecting rod 402 within the support frame 302, preventing it from deviating or bending under excessive force, thereby ensuring the safety and service life of the sofa bed 100.

[0044] In the description of this specification, if the reference terms "one embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" appear, it means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0045] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

[0046] In the description of this application, if the "," appears in the patent title, it indicates an "and" relationship, not an "or" relationship. For example, if the patent title is "A, B", it means that the content protected by this application is: the technical solution of the subject name A and the technical solution of the subject name B.

Claims

1. A deformable sofa bed, characterized by: include seat frame; a sofa bed body, the sofa bed body being arranged on the seat frame; An armrest assembly, at least one of which is movably connected to a side of the sofa bed body; the armrest assembly further includes a connecting structure for connecting to the sofa bed body, and changing the connecting structure can drive the armrest assembly from a first state to a second state; in the first state, the armrest assembly is vertically arranged on the side of the sofa bed body; in the second state, the armrest assembly is horizontally arranged on the side of the sofa bed body; The connecting structure includes an armrest connecting rod and a transmission connecting rod, wherein the first end of the transmission connecting rod is transmission-connected to the first end of the armrest connecting rod, and the second end of the armrest connecting rod is transmission-connected to the sofa bed body or the seat frame.

2. The transformable sofa bed according to claim 1, characterized in that: The sofa bed also includes a locking structure, which includes a fixing pin protruding outwardly and arranged on the armrest assembly, a locking member and a locking shaft arranged on the upper part of the seat frame, the locking member is sleeved on the locking shaft and can rotate around the locking shaft; the locking member and the fixing pin are connected by a detachable snap-fit ​​connection, and when the armrest assembly is in the first state, the locking member is snap-fitted to the fixing pin.

3. The transformable sofa bed according to claim 1, characterized in that: The armrest assembly includes a side plate and a support frame connected under the side plate, the transmission connecting rod is accommodated in the support frame, and the second end of the transmission connecting rod extends to the end of the support frame.

4. The transformable sofa bed according to claim 3, characterized in that: The sofa bed body or the seat frame is provided with a first connecting piece and a first rotating shaft extending outward. The first rotating shaft passes through the first connecting piece and the second end of the armrest connecting rod, so that the armrest connecting rod can rotate relative to the first connecting piece.

5. The transformable sofa bed according to claim 4, characterized in that: The first end and the second end of the armrest connecting rod are vertically connected. When the armrest assembly is converted from the first state to the second state, the armrest connecting rod rotates around the first rotating shaft.

6. The transformable sofa bed according to claim 3, characterized in that: The armrest assembly further includes a supporting foot, which is arranged on a side of the armrest assembly opposite to the armrest connecting rod. The supporting foot is movably connected to the supporting frame so that the supporting foot can be rotated and stored on the inner side of the side panel.

7. The transformable sofa bed according to claim 6, characterized in that: The first end and the second end of the transmission connecting rod are first spiral bevel gears, and the first end of the armrest connecting rod and the end of the supporting foot are provided with second spiral bevel gears that mesh with the first spiral bevel gear. The armrest connecting rod, the transmission connecting rod and the supporting foot are sequentially connected in transmission. When the armrest assembly is converted from the first state to the second state, the supporting foot automatically opens outward from the inner side of the side panel.

8. The transformable sofa bed according to claim 3, characterized in that: The side of the seat frame facing the armrest assembly is open, and when the armrest assembly is converted from the second state to the first state, the support frame is stored in the seat frame.

9. The transformable sofa bed according to claim 3, characterized in that: At least one limiting block is provided on the transmission connecting rod, the transmission connecting rod passes through the limiting block and the limiting block is fixed in the supporting frame.

10. The transformable sofa bed according to any one of claims 1 to 9, characterized in that: The armrest assemblies are provided on opposite sides of the sofa bed body. When the armrest assembly on one side is transformed from a first state to a second state, the sofa bed is transformed from a sofa into a reclining chair. When the armrest assemblies on both sides are transformed from the first state to the second state, the sofa bed is transformed from a sofa into a bed.

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