An electric sofa bed frame and a sofa bed

Abstract

The application discloses an electric sofa bed frame and a sofa bed. The electric sofa bed frame comprises a bottom frame, a back frame, a seat frame, a linkage assembly and a driving assembly. The back end of the back frame is hinged to the front end of the bottom frame. The back end of the seat frame is hinged to the front end of the back frame. The back frame and the seat frame are connected with the linkage assembly. The driving assembly is connected with the linkage assembly and is used for driving the linkage assembly to reciprocate. The movement of the linkage assembly will synchronously provide driving force to the back frame and the seat frame, so as to switch the electric sofa bed frame between a bed state and a sofa state. In the application, the driving assembly drives the linkage assembly to reciprocate, so that the linkage assembly synchronously provides driving force to the back frame and the seat frame, effectively solves the problem of uneven transmission of driving force, makes the movement of the back frame and the seat frame more coordinated, significantly improves the operation stability of the electric sofa bed frame, ensures that the state switching process is smoother, and greatly optimizes the use experience of users.

Description

Technical Field

[0001] This application relates to the field of furniture technology, and in particular to an electric sofa bed frame and sofa bed. Background Technology

[0002] As people's living standards continue to improve, the demands for home environments are becoming increasingly diverse. Traditional furniture can no longer meet the flexibility and multifunctionality requirements of modern life. Sofa beds, as an innovative type of furniture, are favored by consumers for their dual function as both sofas and beds. They can function as sofas during the day for rest and entertaining guests, and transform into beds at night, greatly saving space and enhancing the flexibility of the home environment.

[0003] However, existing sofa bed technology has significant drawbacks. Currently, the switching of a sofa bed's position is mainly achieved by moving the seat frame forward and backward using a motor or manually, simultaneously rotating the backrest hinged to its rear end. However, due to potential looseness or insufficient rigidity at the hinge points, the transmission of driving force is often uneven. This results in the backrest not being able to effectively overcome its own inertia, causing difficulty in coordinating the movement of the backrest and seat frame. Consequently, this leads to instability in sofa bed operation and a choppy switching process, affecting not only the user experience but also reducing the product's reliability and lifespan. Utility Model Content

[0004] In order to overcome at least one of the defects described in the prior art, this application provides an electric sofa bed frame and sofa bed that effectively solves the problem of uneven transmission of driving force, making the movement of the back frame and seat frame more coordinated.

[0005] An electric sofa bed frame according to an embodiment of this application includes: a base frame; a back frame, the rear end of which is hinged to the front end of the base frame; a seat frame, the rear end of which is hinged to the front end of the back frame; a linkage assembly, to which both the back frame and the seat frame are connected; and a drive assembly, connected to the linkage assembly, for driving the linkage assembly to reciprocate, and the movement of the linkage assembly synchronously provides driving force to the back frame and the seat frame, so that the electric sofa bed frame switches between a bed state and a sofa state.

[0006] In this electric sofa bed frame, the drive component drives the linkage component to reciprocate, so that the linkage component synchronously provides driving force to the back frame and the seat frame. This effectively solves the problem of uneven transmission of driving force, makes the movement of the back frame and the seat frame more coordinated, significantly improves the operational stability of the electric sofa bed frame, and ensures a smoother state switching process, thereby greatly optimizing the user experience.

[0007] According to some embodiments of this application, the driving component includes a linear motor and a slider, the linear motor acting on the slider, and the slider being connected to the linkage component.

[0008] According to some embodiments of this application, the linkage component includes a first connecting rod, a second connecting rod, and a linkage connector; the first connecting rod is disposed between the back frame and the linkage connector; the second connecting rod is disposed between the seat frame and the linkage connector; the linkage connector is connected to the drive component, and when the drive component drives the linkage connector to reciprocate, the first connecting rod drives the back frame to rotate, while the second connecting rod drives the seat frame to move in the front-back direction.

[0009] According to some embodiments of this application, the first linkage includes a first drive link, a linkage groove, and a second drive link; one end of the first drive link is pivotally connected to the back frame; the linkage groove extends along the length direction of the first drive link and is disposed on the first drive link; one end of the second drive link is pivotally connected to the linkage connector, and the other end of the second drive link is provided with a hinge shaft, which is rotatably disposed in the linkage groove and can move along the linkage groove.

[0010] According to some embodiments of this application, the second linkage includes a first rotating link, a second rotating link, and a drive shaft; the drive shaft is assembled to the linkage connector, the middle portions of the first rotating link and the second rotating link are both pivotally connected to the drive shaft, and the first rotating link and the second rotating link are intersecting; a third rotating link is hinged to the front end of the first rotating link, the front end of the third rotating link is pivotally connected to the seat frame, a fourth rotating link is hinged to the rear end of the first rotating link, and the rear end of the fourth rotating link is pivotally connected to the bottom frame; a fifth rotating link is hinged to the front end of the second rotating link, the front end of the fifth rotating link is pivotally connected to the seat frame, and a sixth rotating link is hinged to the rear end of the second rotating link, and the rear end of the sixth rotating link is pivotally connected to the bottom frame.

[0011] According to some embodiments of this application, the linkage component further includes a linkage guide rail, a linkage roller, and a linkage link; the linkage guide rail extends in the front-to-back direction; the linkage roller slides on the linkage guide rail; and the linkage link connects the linkage roller and the linkage connector.

[0012] According to some embodiments of this application, an adjusting roller is also included, which is mounted on the bottom of the seat frame for contacting the ground.

[0013] According to some embodiments of this application, the front end of the bottom frame is provided with two auxiliary support frames, and a storage cavity is formed between the two auxiliary support frames; when the electric sofa bed frame switches between bed mode and sofa mode, the seat frame can be stored in or extend out of the storage cavity; when the electric sofa bed frame switches from sofa mode to bed mode, the back frame abuts against the top of the auxiliary support frame.

[0014] According to some embodiments of this application, the back frame includes a flip frame and an extension frame; the rear end of the flip frame is hinged to the bottom frame, and the flip frame is connected to the linkage assembly; the rear end of the extension frame is hinged to the front end of the flip frame, and the front end of the extension frame is hinged to the rear end of the seat frame.

[0015] Based on the same inventive concept, this application also proposes a sofa bed, including: an electric sofa bed frame as described above.

[0016] In summary, the electric sofa bed frame provided in this application has the following technical advantages:

[0017] The drive component drives the linkage component to reciprocate, so that the linkage component synchronously provides driving force to the back frame and the seat frame. This effectively solves the problem of uneven transmission of driving force, makes the movement of the back frame and the seat frame more coordinated, significantly improves the operational stability of the electric sofa bed frame, and ensures a smoother state switching process, thereby greatly optimizing the user experience. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the electric sofa bed frame in bed mode in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the second connecting rod in the bed state in an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the first connecting rod in the bed state in an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the structure of the electric sofa bed frame in the sofa state in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the second link in the sofa state in an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the first link member in the sofa state in an embodiment of this application;

[0024] Figure 7This is a schematic diagram of the structure of the driving component in an embodiment of this application.

[0025] The meanings of the reference numerals in the attached figures are as follows:

[0026] 1. Base frame; 11. Auxiliary support frame; 12. Storage cavity; 2. Back frame; 21. Flip frame; 22. Extension frame; 3. Seat frame; 31. Adjusting roller; 4. Linkage assembly; 41. First connecting rod; 411. First drive connecting rod; 412. Linkage groove; 413. Second drive connecting rod; 414. Hinge shaft; 42. Second connecting rod; 421. First rotating connecting rod; 422. Second rotating connecting rod; 423. Third rotating connecting rod; 424. Fourth rotating connecting rod; 425. Fifth rotating connecting rod; 426. Sixth rotating connecting rod; 427. Drive shaft; 43. Linkage connector; 44. Linkage guide rail; 45. Linkage roller; 46. Linkage connecting rod; 5. Drive assembly; 51. Linear motor; 52. Slider. Detailed Implementation

[0027] To better understand and implement this application, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings.

[0028] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0030] See Figure 1 and Figure 4This application discloses an electric sofa bed frame. The electric sofa bed frame includes a base frame 1, a back frame 2, a seat frame 3, and a drive mechanism 4. In some embodiments, the rear end of the back frame 2 is hinged to the front end of the base frame 1; the rear end of the seat frame 3 is hinged to the front end of the back frame 2; a linkage component 4 is connected to both the back frame 2 and the seat frame 3; and a drive component 4 is connected to the linkage component 4, used to drive the linkage component 4 to reciprocate, and the movement of the linkage component 4 synchronously provides driving force to the back frame 2 and the seat frame 3, so that the electric sofa bed frame switches between a bed state and a sofa state. Preferably, by driving the linkage component 4 to reciprocate, so that the linkage component 4 synchronously provides driving force to the back frame 2 and the seat frame 3, the problem of uneven transmission of driving force is effectively solved, making the movement of the back frame 2 and the seat frame 3 more coordinated, significantly improving the operational stability of the electric sofa bed frame, and ensuring a smoother state switching process, thereby greatly optimizing the user experience.

[0031] See Figure 1 and Figure 4 In some embodiments, when the electric sofa bed frame is in sofa mode, there is an angle between the back frame 2 and the seat frame 3, so that the back frame 2 can provide back support for the user sitting on the seat frame 3. When the electric sofa bed frame is in bed mode, the back frame 2 and the seat frame 3 are laid flat in the front-to-back direction. Preferably, the back frame 2 includes a flip frame 21 and an extension frame 22. The rear end of the flip frame 21 is hinged to the bottom frame 1, and the flip frame 21 is connected to the linkage assembly 4. The rear end of the extension frame 22 is hinged to the front end of the flip frame 21, and the front end of the extension frame 22 is hinged to the rear end of the seat frame 3. That is, the back frame 2 can be composed of the flip frame 21 and the extension frame 22. During the state switching process, the linkage component 4 synchronously provides driving force to the flip frame 21 and the seat frame 3, so that while the flip frame 21 rotates, the seat frame 3 moves in the front-back direction, and the flip frame 21 drives the rear end of the extension frame 22 to flip, and the seat frame 3 drives the front end of the extension frame 22 to move. This effectively solves the problem of uneven transmission of driving force and makes the movement of the back frame 2 and the seat frame 3 more coordinated.

[0032] See Figure 7In some embodiments, the drive assembly 4 includes a linear motor 51 and a slider 52. The linear motor 51 acts on the slider 52, and the slider 52 is connected to the linkage assembly 4. Preferably, the linear motor 51 drives the slider 52 to move along a straight line, so that the slider 52 can drive the linkage assembly 4 to move along a straight line. This effectively optimizes the smoothness and stability of the reciprocating motion of the linkage assembly 4 driving the tilting frame 21 and the seat frame 3, improving the user experience. Optionally, the linear motor 51 can be replaced with a linear electric actuator such as a cylinder, electric cylinder, or electric lead screw.

[0033] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the linkage component 4 includes a first connecting rod 41, a second connecting rod 42, and a linkage connector 43; the first connecting rod 41 is disposed between the back frame 2 and the linkage connector 43; the second connecting rod 42 is disposed between the seat frame 3 and the linkage connector 43; the linkage connector 43 is connected to the drive component 4, and when the drive component 4 drives the linkage connector 43 to reciprocate, the first connecting rod 41 drives the back frame 2 to rotate, while the second connecting rod 42 drives the seat frame 3 to move in the front-back direction. Preferably, the drive assembly 4 is connected to the linkage connector 43, so that the drive assembly 4 can synchronously transmit power to the first connecting rod 41 and the second connecting rod 42 through the linkage connector 43. In this way, the first connecting rod 41 can drive the back frame 2 to rotate, while the second connecting rod 42 can drive the seat frame 3 to move in the front-back direction, thereby effectively solving the problem of uneven transmission of driving force and making the movement of the back frame 2 and the seat frame 3 more coordinated. Optionally, the linkage connector 43 is fixedly connected to the slider 52. Optionally, the fixed connection can be a bolt connection, riveting, or welding connection. Optionally, the linkage connector 43 is sleeved on the outside of the slider 52 and fixedly connected to the slider 52. Optionally, the linkage connector 43 abuts against one side of the slider 52 and is fixedly connected to the slider 52. In this way, the linear motor 51 can drive the linkage connector 43 to move in a straight line through the slider 52, thereby driving the first connecting rod 41 and the second connecting rod 42 to realize the synchronous reciprocating motion of the flipping frame 21 and the seat frame 3.

[0034] See Figure 3 and Figure 6In some embodiments, the first connecting rod 41 includes a first driving connecting rod 411, a linkage groove 412, and a second driving connecting rod 413; one end of the first driving connecting rod 411 is pivotally connected to the back frame 2; the linkage groove 412 extends along the length direction of the first driving connecting rod 411 and is disposed on the first driving connecting rod 411; one end of the second driving connecting rod 413 is pivotally connected to the linkage connector 43, and the other end of the second driving connecting rod 413 is provided with a hinge shaft 414, which is rotatably disposed in the linkage groove 412 and can move along the linkage groove 412. Preferably, when the electric sofa bed frame is in sofa mode, the hinge shaft 414 abuts against the end of the linkage groove 412 away from the flip frame 21. When the drive mechanism 4 drives the electric sofa bed frame to switch from sofa mode to bed mode, the linear motor 51 drives the slider 52 to move forward. The slider 52 drives the second drive link 413, which is pivotally connected to the linkage link 43, to move forward through the linkage connector 43. This drives the second drive link 413 to drive the first drive link 411 to move the bed. The flip frame 21 rotates downward about its pivot axis with respect to the base frame 1. As the flip frame 21 rotates downward, the hinge shaft 414 moves along the linkage groove 412 toward the flip frame 21, simultaneously driving the first drive link 411 to rotate upward about its pivot axis with respect to the flip frame 21, and the second drive link 413 to rotate downward about its pivot axis with respect to the linkage connector 43. When the flip frame 21, the extension frame 22, and the seat frame 3 are laid flat on the same plane, the electric sofa bed frame is in bed-like position. In the current state, the linear motor 51 stops driving the slider 52 forward, and at this time, the hinge shaft 414 abuts against the end of the linkage groove 412 near the flip frame 21; when the electric sofa bed frame switches from bed state to sofa state, the linear motor 51 drives the slider 52 to move backward, and the slider 52 drives the second drive link 413, which is pivotally connected to the linkage link 43, to move backward through the linkage connector 43, causing the second drive link 413 to drive the first drive link 411 to move the... The flip frame 21 rotates upward about its pivot axis with respect to the base frame 1. As the flip frame 21 rotates upward, the hinge shaft 414 moves away from the flip frame 21 along the linkage groove 412. At the same time, it drives the first drive link 411 to rotate downward about its pivot axis with respect to the flip frame 21, and the second drive link 413 to rotate upward about its pivot axis with respect to the linkage connector 43. After the electric sofa bed frame is in the sofa state, the linear motor 51 stops driving the slider 52 to move backward.

[0035] See Figure 2 and Figure 5In some embodiments, the second connecting rod 42 includes a first rotating connecting rod 421, a second rotating connecting rod 422, and a drive shaft 427; the drive shaft 427 is assembled to the linkage connector 43, the middle portions of the first rotating connecting rod 421 and the middle portions of the second rotating connecting rod 422 are both pivotally connected to the drive shaft 427, and the first rotating connecting rod 421 and the second rotating connecting rod 422 are arranged intersectingly; a third rotating connecting rod 42 is hinged to the front end of the first rotating connecting rod 421. 3. The front end of the third rotating link 423 is pivotally connected to the seat frame 3. The rear end of the first rotating link 421 is hinged to the fourth rotating link 424, and the rear end of the fourth rotating link is pivotally connected to the bottom frame 1. The front end of the second rotating link 422 is hinged to the fifth rotating link 425, and the front end of the fifth rotating link 425 is pivotally connected to the seat frame 3. The rear end of the second rotating link 422 is hinged to the sixth rotating link 426, and the rear end of the sixth rotating link is pivotally connected to the bottom frame 1.Preferably, the first rotating link 421 and the second rotating link 422 are arranged in a cross configuration. Optionally, the middle portions of the first rotating link 421 and the second rotating link 422 are sequentially rotatably connected to the drive shaft 427 in the height direction, and the first rotating link 421 and the second rotating link 422 are arranged in an "X" shape. Preferably, when the electric sofa bed frame is driven to switch from sofa mode to bed mode, the linear motor 51 drives the slider 52 to move forward, and the slider 52 drives the drive shaft 427 to move forward through the linkage connector 43. In this way, the first rotating link 421 and the second rotating link 422, which are pivotally connected to the drive shaft 427, move forward together. The first rotating link 421 moves forward, and pulls the fourth rotating link 424 and the third rotating link 423 to rotate, causing the included angle between the first rotating link 421 and the fourth rotating link 424 and the third rotating link 423 to increase. That is, the first rotating link 421, the fourth rotating link 424 and the third rotating link 423 switch from a retracted state to an extended state. Correspondingly, the second rotating link 422 pulls the fifth rotating link 425 and the sixth rotating link to rotate, causing the included angle between the second rotating link 422 and the fifth rotating link 425 and the sixth rotating link to increase. That is, the second rotating link 422... The fifth rotating link 425 and the sixth rotating link switch from a retracted state to an extended state, thereby driving the seat frame 3 forward and achieving a doubling forward movement effect. When the electric sofa bed frame switches from bed mode to sofa mode, the linear motor 51 drives the slider 52 to move backward. The slider 52 drives the drive shaft 427 to move backward through the linkage connector 43. Thus, the first rotating link 421 and the second rotating link 422, which are pivotally connected to the drive shaft 427, move backward synchronously. Furthermore, the first rotating link 421 pulls the fourth rotating link 424 and the third rotating link 423 to rotate in the opposite direction, causing the first rotating link 421 and the... The angle between the fourth rotating link 424 and the third rotating link 423 decreases, meaning that the first rotating link 421, the fourth rotating link 424, and the third rotating link 423 switch from an extended state to a retracted state. Correspondingly, the second rotating link 422 pulls the fifth rotating link 425 and the sixth rotating link to rotate in the opposite direction, causing the angle between the second rotating link 422 and the fifth rotating link 425 and the sixth rotating link to decrease. This means that the second rotating link 422, the fifth rotating link 425, and the sixth rotating link switch from an extended state to a retracted state, thereby driving the seat frame 3 to move backward and achieving a doubling backward movement effect.

[0036] See Figure 2 and Figure 3 In some embodiments, the linkage component 4 further includes a linkage guide rail 44, a linkage roller 45, and a linkage link 46; the linkage guide rail 44 extends in the front-to-back direction; the linkage roller 45 slides on the linkage guide rail 44; and the linkage link 46 connects the linkage roller 45 and the linkage connector 43. Thus, when the linear motor 51 drives the linkage connector 43 to reciprocate in the front-to-back direction via the slider 52, the linkage connector 43 can synchronously drive the linkage roller 45 to move along the linkage guide rail 44. The linkage connector 43 can effectively support the linkage connector 43, preventing it from sinking due to excessive travel. Furthermore, since the linkage connector 43 can support the linkage connector 43, and the linkage guide rail 44 can limit the movement trajectory of the linkage roller 45, the linear motor 51 can be connected to the base frame 1 using simple assembly methods such as pin connections, optimizing the assembly steps and reducing the workload of assembly.

[0037] See Figure 1 , Figure 2 and Figure 3 In some embodiments, an adjusting roller 31 is also included, which is mounted on the bottom of the seat frame 3 to abut against the ground. Preferably, by mounting the adjusting roller 31 on the bottom of the seat frame 3 and abutting against the ground, when the seat frame 3 reciprocates in the back-and-forth direction, the adjusting roller 31 can reduce the friction between the seat frame 3 and the ground, effectively optimizing the smoothness and stability of the reciprocating movement of the seat frame 3, thereby improving the smoothness and stability of the electric sofa bed frame when switching between bed and sofa modes. Furthermore, a fixed support member is also included, which is mounted on the bottom of the base frame 1 to abut against the ground. Preferably, the base frame 1 is supported on the ground by the fixed support member to avoid the base frame 1 directly contacting the ground and to prevent the base frame 1 from being worn. Optionally, the fixed support member can be a support leg, a pad, etc. Optionally, the pad is made of silicone, rubber, EVA foam, plastic, sponge, etc., which has good anti-slip performance and can increase the stability of the seat.

[0038] See Figure 1 , Figure 2 and Figure 4In some embodiments, the front end of the bottom frame 1 is provided with two auxiliary support frames 11, and the two auxiliary support frames 11 are spaced apart to form a storage cavity 12; when the electric sofa bed frame switches between the bed state and the sofa state, the seat frame 3 can be stored in or extend out of the storage cavity 12; when the electric sofa bed frame switches from the sofa state to the bed state, the back frame 2 abuts against the top of the auxiliary support frame 11. Optionally, the two auxiliary support frames 11 are spaced laterally and form the storage cavity 12 with its opening facing the front. Thus, when the electric sofa bed frame switches between bed and sofa modes, the seat frame 3 can accommodate or extend from the storage cavity 12. Optionally, when the electric sofa bed frame switches from sofa to bed mode, both the extension frame 22 and the flip frame 21 abut against the top of the auxiliary support frame 11. Optionally, at this time, the flip frame 21 and the extension frame 22 are laid flat on the auxiliary support frame 11 in the front-to-back direction, and the auxiliary support frame 11 supports the flip frame 21 and the extension frame 22 in the bed mode to improve the stability of the electric sofa bed frame and prevent it from wobbling. Furthermore, the auxiliary support frame 11 can also be replaced with components such as armrests.

[0039] In some embodiments, a sofa bed includes: an electric sofa bed frame as described above.

[0040] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7In some embodiments, when the electric sofa bed frame switches from sofa mode to bed mode, the linear motor 51 drives the slider 52 to move forward. The slider 52 drives the drive shaft 427 and the second drive link 413, which are pivotally connected to the linkage connector 43, to move forward. The first rotating link 421 and the second rotating link 422, which are pivotally connected to the drive shaft 427, move forward synchronously. The first rotating link 421 pulls the fourth rotating link 424 and the third rotating link 423 to rotate, so that the included angle between the first rotating link 421 and the fourth rotating link 424 and the third rotating link 423 increases. That is, the first rotating link 421, the fourth rotating link 424 and the third rotating link 423 switch from a retracted state to an extended state. Correspondingly, the second rotating link 422 pulls the fifth rotating link 425 and the sixth rotating link to rotate, so that the first rotating link 521, the fourth rotating link 424 and the third rotating link 423 switch from a retracted state to an extended state. The angle between the second rotating link 422 and the fifth rotating link 425 and the sixth rotating link increases, that is, the second rotating link 422, the fifth rotating link 425 and the sixth rotating link switch from the retracted state to the extended state, thereby driving the seat frame 3 to move forward. At the same time, the second driving link 413 drives the flip frame 21 to rotate downward about its own pivot axis and the pivot axis of the bottom frame 1 through the first driving link 411. As the flip frame 21 rotates downward, the hinge shaft 414 moves along the linkage groove 412 towards the flip frame 21, while driving the first driving link 411 to rotate upward about its own pivot axis and the pivot axis of the flip frame 21. The second driving link 413 rotates downward about its own pivot axis and the pivot axis of the linkage connector 43. When the flip frame 21, the extension frame 22 and the seat frame 3 are laid flat on the same plane, the electric sofa bed frame is in the bed state, and the linear motor 51 stops driving the slider 52 to move forward.When the electric sofa bed frame switches from bed mode to sofa mode, the linear motor 51 drives the slider 52 to move backward. The slider 52, through the linkage connector 43, drives the drive shaft 427 and the second drive link 413 to pivot on one end of the linkage connector 43 and move backward. The first rotating link 421 and the second rotating link 422, pivoted on the drive shaft 427, move backward synchronously. The first rotating link 421 pulls the fourth rotating link 424 and the third rotating link 423 to rotate in the opposite direction, making the included angle between the first rotating link 421 and the fourth rotating link 424 and the third rotating link 423 smaller. That is, the first rotating link 421, the fourth rotating link 424, and the third rotating link 423 switch from the extended state to the retracted state. Correspondingly, the second rotating link 422 pulls the fifth rotating link 425 and the sixth rotating link to rotate in the opposite direction, making the second rotating link 425... The angle between link 422 and the fifth and sixth rotating links decreases, meaning that the second, fifth, and sixth rotating links switch from an extended state to a retracted state, thereby driving the seat frame 3 to move backward. Simultaneously, the second drive link 413 drives the tilting frame 21 to rotate upward about its pivot axis with respect to the base frame 1 via the first drive link 411. At the same time, the slider 52 drives the first link 41 to drive the seat frame 3 backward. As the tilting frame 21 rotates upward, the hinge shaft 414 moves away from the tilting frame 21 along the linkage groove 412, simultaneously driving the first drive link 411 to rotate downward about its pivot axis with respect to the tilting frame 21, and the second drive link 413 to rotate upward about its pivot axis with respect to the linkage connector 43. This continues until the electric sofa bed frame is in the sofa position, at which point the linear motor 51 stops driving the slider 52 to move backward.

[0041] The technical means disclosed in this application are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. An electric sofa bed frame, characterized in that, include: Bottom frame (1); The back frame (2) is hinged to the front end of the bottom frame (1); The seat frame (3) is hinged to the front end of the back frame (2); Linkage component (4), the back frame (2) and the seat frame (3) are both connected to the linkage component (4); A drive component (5) is connected to the linkage component (4) and is used to drive the linkage component (4) to reciprocate. The movement of the linkage component (4) will synchronously provide driving force to the back frame (2) and the seat frame (3) so that the electric sofa bed frame can switch between bed state and sofa state.

2. The electric sofa bed frame according to claim 1, characterized in that: The driving component (5) includes a linear motor (51) and a slider (52). The linear motor (51) acts on the slider (52), and the slider (52) is connected to the linkage component (4).

3. The electric sofa bed frame according to claim 1, characterized in that: The linkage component (4) includes a first link (41), a second link (42), and a linkage connector (43); The first connecting rod (41) is disposed between the back frame (2) and the linkage connector (43); The second connecting rod (42) is disposed between the seat frame (3) and the linkage connector (43); The linkage connector (43) is connected to the drive assembly (5), and when the drive assembly (5) drives the linkage connector (43) to reciprocate, the first connecting rod (41) drives the back frame (2) to rotate, while the second connecting rod (42) drives the seat frame (3) to move in the front-back direction.

4. The electric sofa bed frame according to claim 3, characterized in that: The first connecting rod (41) includes a first driving connecting rod (411), a linkage groove (412), and a second driving connecting rod (413); One end of the first drive link (411) is pivotally connected to the back frame (2); The linkage groove (412) extends along the length direction of the first drive link (411) and is disposed on the first drive link (411); One end of the second drive link (413) is pivotally connected to the linkage connector (43), and the other end of the second drive link (413) is provided with a hinge shaft (414). The hinge shaft (414) is rotatably disposed in the linkage groove (412) and can move along the linkage groove (412).

5. The electric sofa bed frame according to claim 3, characterized in that: The second connecting rod (42) includes a first rotating connecting rod (421), a second rotating connecting rod (422), and a drive shaft (427); The drive shaft (427) is assembled to the linkage connector (43). The middle part of the first rotating link (421) and the middle part of the second rotating link (422) are both pivotally connected to the drive shaft (427), and the first rotating link (421) and the second rotating link (422) are arranged to intersect. The front end of the first rotating link (421) is hinged to a third rotating link (423), the front end of the third rotating link (423) is pivotally connected to the seat frame (3), and the rear end of the first rotating link (421) is hinged to a fourth rotating link (424), the rear end of the fourth rotating link is pivotally connected to the bottom frame (1). The front end of the second rotating link (422) is hinged to a fifth rotating link (425), the front end of the fifth rotating link (425) is pivotally connected to the seat frame (3), and the rear end of the second rotating link (422) is hinged to a sixth rotating link (426), the rear end of the sixth rotating link is pivotally connected to the bottom frame (1).

6. The electric sofa bed frame according to claim 3, characterized in that: The linkage component (4) also includes a linkage guide rail (44), a linkage roller (45), and a linkage link (46); The linkage guide rail (44) extends in the front-to-back direction; The linkage roller (45) is slidably mounted on the linkage guide rail (44); The linkage rod (46) is connected between the linkage roller (45) and the linkage connector (43).

7. The electric sofa bed frame according to claim 1, characterized in that: It also includes an adjustment roller (31), which is mounted on the bottom of the seat frame (3) for contacting the ground.

8. The electric sofa bed frame according to claim 1, characterized in that: The front end of the bottom frame (1) is provided with two auxiliary support frames (11), and a storage cavity (12) is formed between the two auxiliary support frames (11). When the electric sofa bed frame switches between bed mode and sofa mode, the seat frame (3) can be folded into or extended from the storage cavity (12); When the electric sofa bed frame switches from sofa mode to bed mode, the back frame (2) abuts against the top of the auxiliary support frame (11).

9. The electric sofa bed frame according to any one of claims 1-8, characterized in that: The back frame (2) includes a flip frame (21) and an extension frame (22); The rear end of the flipping frame (21) is hinged to the bottom frame (1), and the flipping frame (21) is connected to the linkage component (4); The rear end of the extension frame (22) is hinged to the front end of the flip frame (21), and the front end of the extension frame (22) is hinged to the rear end of the seat frame (3).

10. A sofa bed, characterized in that, include: The electric sofa bed frame as described in any one of claims 1-9.

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