Sofa bed frame and sofa bed

Abstract

The utility model relates to the technical field of sofa bed accessories, in particular to a sofa bed frame and a sofa bed, which comprise a bottom frame, a first support extending along the upper side direction of the bottom frame, a second support connected to the bottom frame in a sliding manner, and a sliding mechanism connected between the second support and the bottom frame, the first support is provided with a first supporting part arranged in the vertical direction, the bottom frame is provided with a bottom frame connecting part arranged in the horizontal direction, and a fastening reinforcing piece is connected between one end of the first supporting part and one end of the bottom frame connecting part. According to the utility model, by utilizing the fastening reinforcer arranged between the first supporting part and the underframe connecting part and increasing extra supporting force, the connection between the first bracket and the underframe is firmer, the first bracket or the underframe is prevented from shaking or deforming when being locally stressed, the potential safety hazard caused by damage of parts is reduced, and the service life of the first bracket and the underframe is prolonged. And the service life of the product is prolonged, so that the use requirements of users are met.

Description

Technical Field

[0001] The utility model relates to the technical field of sofa bed accessories, in particular to a sofa bed frame and a sofa bed. Background Art

[0002] A sofa bed is a multifunctional furniture, and users can switch between two states of a bed and a sofa according to usage requirements, which can meet the needs of modern home for space utilization and diversified furniture functions. For example, a translational sofa bed disclosed in Chinese Patent Document CN106388388A includes a backrest vertical board; a front skeleton arranged at the lower part of the front surface of the backrest vertical board, and slide rails are respectively arranged on both sides of the front skeleton; when this solution is in the sofa state, the user lies on the backrest cushion, and the stress points will be concentrated on the backrest vertical board, and the backrest vertical board has a tendency to shake back and forth. When this solution is converted to the bed state, the user lies on the front skeleton, and the stress points will be concentrated on the front skeleton. When the user needs to turn around, this stress mode easily causes the front skeleton to shake left and right. Since the stress of the sofa bed in this solution is uneven, it is easy to cause damage to structural components, which will not only shorten the service life of the product, but also affect the user's use safety and experience. Therefore, it is necessary to improve this structure to further enhance the stability and safety factor of the product to meet the user's usage requirements. Summary of the Utility Model

[0003] In view of the above-mentioned technical problem that the existing sofa bed has uneven stress, which is easy to cause damage to structural components, not only shortening the service life of the product, but also affecting the user's use safety and experience, the technical solution adopted by the utility model to solve its technical problem is:

[0004] A sofa bed frame includes a bottom frame, and further includes a first bracket extending along the upper side direction of the bottom frame, a second bracket slidably connected to the bottom frame, and a sliding mechanism connected between the second bracket and the bottom frame. The first bracket is provided with a first support portion arranged in the vertical direction, the bottom frame is provided with a bottom frame connection portion arranged in the horizontal direction, and a fastening and strengthening member is connected between one end of the first support portion and one end of the bottom frame connection portion.

[0005] Further, in some embodiments of the utility model, the fastening and strengthening member includes a first strengthening portion located outside the first support portion and a second strengthening portion located outside the bottom frame connection portion, and the projections of the first strengthening portion and the second strengthening portion are arranged in an L shape.

[0006] Further, in some embodiments of the utility model, the fastening and strengthening member, the first support portion and the bottom frame connection portion are fixedly connected.

[0007] Further, in some embodiments of the present utility model, the first bracket is provided with a first extension portion connected to the other end of the first support portion. The first extension portion extends towards the second bracket, and the extension length of the first extension portion is less than or equal to the extension length of the first support portion. The other end of the first support portion is provided with a second extension portion extending upwards, and the extension length of the second extension portion is less than the extension length of the first support portion.

[0008] Further, in some embodiments of the present utility model, the fastening and strengthening member is further provided with a third strengthening portion. The third strengthening portion is provided with a fastening connection end for the connecting member to pass through. The first strengthening portion, the second strengthening portion, and the third strengthening portion enclose to form a receiving cavity. The receiving cavity is for the first support portion or the first extension portion to extend into to form an unfolded state or a stored state. The first support portion and the first extension portion are provided with a mating connection end for mating connection with the fastening connection end and the connecting member. The fastening and strengthening member further includes a fourth strengthening portion connected to the lower side of the first strengthening portion and / or the lower side of the second strengthening portion. The fourth strengthening portion is used to limit the first support portion or the first extension portion from passing through the receiving cavity.

[0009] Further, in some embodiments of the present utility model, the sliding mechanism includes a guide rail connected to the chassis, a second bracket sliding end connected to the bottom of the second bracket, and a ball located between the guide rail and the second bracket sliding end. The guide rail is provided with a guide rail limiting cavity for the ball to extend into, and the second bracket sliding end is provided with a sliding mating end for mating contact with the ball.

[0010] Further, in some embodiments of the present utility model, the sliding mechanism further includes a sliding bracket slidably connected to the guide rail. The sliding bracket includes a sliding bracket main body, sliding bracket connecting portions located on both sides of the sliding bracket main body, and a sliding bracket limiting groove located between the sliding bracket main body and the sliding bracket connecting portion for the second bracket sliding end to extend into. The sliding bracket connecting portion is provided with a clamping cavity for accommodating the ball, and both ends of the guide rail are respectively provided with guide rail limiting ends for limiting the sliding bracket from detaching.

[0011] Further, in some embodiments of the present utility model, a connecting rod assembly is further provided between the chassis and the second bracket. The chassis is provided with a first cross bar away from the first bracket and a second cross bar close to the first bracket. Both the first cross bar and the second cross bar are connected between two chassis connection parts. The connecting rod assembly includes a first connection seat connected to the first cross bar, a first articulated rod connected to the first connection seat, a second connection seat connected to one end of the second bracket, a second articulated rod connected to the second connection seat, and a connection seat assembly located between the first articulated rod and the second articulated rod. The second cross bar is provided with a first buffer member that abuts against the connection seat assembly or the first articulated rod.

[0012] Further, in some embodiments of the present utility model, the connection seat assembly includes a third connection seat connected to the first articulated rod, a fourth connection seat connected to the second articulated rod, and a connecting plate connected between the third connection seat and the fourth connection seat. The connecting plate is provided with a connecting plate extension end extending away from the third connection seat. The connecting plate extension end is provided with a connecting plate convex end extending towards the second articulated rod. The second articulated rod is provided with a second buffer member that cooperates with the connecting plate convex end. The first buffer member is used to abut against and buffer the third connection seat or the first articulated rod.

[0013] A sofa bed, comprising the sofa bed frame as described above and a driving assembly for driving the second bracket to slide relative to the chassis.

[0014] The beneficial effects of the present utility model are as follows:

[0015] By using the fastening and strengthening member provided between the first support portion and the chassis connection part, the connection between the first bracket and the chassis is made more firm by increasing additional support force, preventing the first bracket or the chassis from shaking or deforming when subjected to local force, reducing potential safety hazards caused by component damage, extending the service life of the product, and thus meeting the user's usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the unfolded state of the sofa bed frame of the present utility model.

[0017] Figure 2 It is an exploded view and a partially enlarged view of the sofa bed frame of the present utility model.

[0018] Figure 3 It is a schematic diagram of the storage state of the sofa bed frame of the present utility model and a partially enlarged view.

[0019] Figure 4 It is a schematic diagram of another angle of the unfolded state of the sofa bed frame of the present utility model.

[0020] Figure 5 This is a schematic diagram of another angle of the storage state of the sofa bed frame of the present utility model.

[0021] Figure 6 This is a schematic diagram of the bed state of the sofa bed frame of the present utility model.

[0022] Figure 7 This is a schematic diagram of the sofa state of the sofa bed frame of the present utility model.

[0023] Figure 8 This is an exploded view and a partial enlarged view of the sofa bed frame of the present utility model. Specific embodiments

[0024] The following will make a detailed description of the embodiments of the present utility model with reference to the accompanying drawings.

[0025] As Figures 1 to 8 shown, a sofa bed frame includes a bottom frame 3, and further includes a first support 1 extending along the upper side direction of the bottom frame 3, a second support 2 slidably connected to the bottom frame 3, and a sliding mechanism 4 connected between the second support 2 and the bottom frame 3. The first support 1 is provided with a first support portion 11 arranged in the vertical direction, the bottom frame 3 is provided with a bottom frame connection portion 31 arranged in the horizontal direction, and a fastening and strengthening member 5 is connected between one end of the first support portion 11 and one end of the bottom frame connection portion 31. The present utility model utilizes the fastening and strengthening member arranged between the first support portion and the bottom frame connection portion. By increasing additional supporting force, the connection between the first support and the bottom frame is made more firm, preventing the first support or the bottom frame from shaking or deforming when subjected to local force, reducing potential safety hazards caused by component damage, and prolonging the service life of the product, thereby meeting the usage requirements of users.

[0026] Specifically, the bottom frame serves as the basis of the entire sofa bed frame, capable of supporting the structure of the entire sofa bed frame and connecting various components. The first support is arranged in the vertical direction and is used to bear the backrest pressure when the sofa bed is switched to the sofa state. The second support can move smoothly on the bottom frame through the sliding mechanism, thereby realizing the adjustment of the position of the second support to adapt to the usage requirements of the two different states of the sofa and the bed.

[0027] Specifically, the use of the fastening reinforcement improves the structural stability of the sofa bed frame, reduces the shaking and deformation when stressed, thereby extending the service life of the product. When the user leans against the first support, the stress point will be dispersed to the first support and the bottom frame through the fastening reinforcement, thus reducing the tendency of the first support to shake back and forth. When the user lies on the bottom frame, the stress point will be dispersed to the first support and the bottom frame through the fastening reinforcement, thus reducing the left - right shaking of the bottom frame. The first support and the bottom frame are evenly stressed, reducing the damage of structural components and ensuring the service life of the product, which can improve the user's safety and experience during use.

[0028] Optionally, in some embodiments, materials such as iron frames, high - strength steel, and alloy materials can be used to make the bottom frame, the first support, and the second support to ensure the strength and durability of the sofa bed frame. Of course, wooden materials can also be selected to reduce the weight or cost of the sofa bed frame.

[0029] As Figure 2 and Figure 7 As shown in a sofa bed frame, the fastening reinforcement 5 includes a first reinforcement part 51 located outside the first support part 11 and a second reinforcement part 52 located outside the bottom - frame connection part 31. The projections of the first reinforcement part 51 and the second reinforcement part 52 are arranged in an L - shape.

[0030] Specifically, the first reinforcement part is located at the position where the first support part faces the outside. While facilitating the operation and implementation of the connection, it can strengthen the supporting force of the connection between the first support and the bottom - frame connection part in the vertical direction. The first reinforcement part can effectively share and disperse the stress, preventing the first support part from being damaged due to excessive single - point stress. The second reinforcement part is located at the position where the bottom - frame connection part faces the outside. While facilitating the operation and implementation of the connection, it can enhance the horizontal supporting ability of the bottom frame. The second reinforcement part not only stabilizes the bottom frame itself but also indirectly enhances the firmness of the connection between the bottom frame and the first support.

[0031] Furthermore, as a preferred implementation manner rather than a limitation of the present invention, the L - shape design enables the fastening reinforcement to provide support in both the horizontal and vertical directions simultaneously, forming a stable support structure with multiple firm connection points to disperse the load. The structure of the L - shape design can effectively resist the influence of external forces, reduce the vulnerability caused by single - point connection, and lower the risk of structural deformation and damage, thereby improving the load - bearing capacity and service life of the entire sofa bed frame.

[0032] In addition, the design of the L - shaped fastening reinforcement not only has practicality but also can enhance the aesthetic appearance of the sofa bed to a certain extent. Through the layout and hidden design of the L - shaped fastening reinforcement, the fastening reinforcement can be coordinated with the overall style of the sofa bed without damaging the overall aesthetics.

[0033] AsFigure 2 and Figure 7 A sofa bed frame as shown, the fastening and strengthening member 5, the first support portion 11 and the bottom frame connection portion 31 are fixedly connected. Further, as a preferred embodiment of the present invention rather than a limitation, a rigid integral structure is formed between the fastening and strengthening member, the first support portion and the bottom frame connection portion through the fixed connection. This rigid structure can more effectively resist the action of external forces, reduce structural deformation and displacement, thereby improving the overall rigidity and stability of the sofa bed frame. At the same time, since the fixed connection reduces the relative movement and wear between components, the service life of the sofa bed frame can be extended.

[0034] Optionally, in some embodiments, the sofa bed frame is made of iron material, and the fastening and strengthening member, the first support portion and the bottom frame connection portion can be fixedly connected by welding. The welding connection method can ensure that the connection part has good strength and durability, thereby improving the strength of the structure.

[0035] Optionally, in some embodiments, the fastening and strengthening member, the first support portion and the bottom frame connection portion can also be fixedly connected by riveting.

[0036] Of course, the fastening and strengthening member, the first support portion and the bottom frame connection portion can also be fixedly connected by bolt or screw connection. Specifically, using high-strength bolts and nuts to fasten the components together can tightly fix the fastening and strengthening member, the first support portion and the bottom frame connection portion, thereby providing sufficient structural strength. At the same time, it is also convenient for disassembly and maintenance.

[0037] such as Figures 1 to 8A sofa bed frame is shown. The first bracket 1 is provided with a first extension portion 12 connected to the other end of the first support portion 11. The first extension portion 12 extends towards the second bracket 2. The extension length of the first extension portion 12 is less than or equal to the extension length of the first support portion 11. The other end of the first support portion 11 is provided with a second extension portion 13 extending upwards. The extension length of the second extension portion 13 is less than the extension length of the first support portion 11. Further, as a preferred embodiment of the present invention rather than a limitation, the first bracket is effectively supported and reinforced in both the vertical and horizontal directions, improving the overall stability of the sofa bed frame. Specifically, one end of the first support portion is fixedly connected to the chassis connection portion through a fastening and strengthening member, which can ensure the structural stability. The first extension portion extends from the other end of the first support portion and extends towards the second bracket, and can be used as a load-bearing member for cooperating with the first support portion arranged in the vertical direction to support the sofa bed frame. Specifically, the horizontal extension length of the first extension portion is less than or equal to the vertical extension length of the first support portion, and the first extension portion does not protrude too long from the front of the sofa bed frame, thus maintaining the neat appearance and convenience of use, and also avoiding the tendency of the sofa bed frame to tip towards the second bracket during the load-bearing process.

[0038] In addition, the second extension portion extends upwards from the other end of the chassis connection portion. The second extension portion and the first support portion extend upwards simultaneously. The extension length of the second extension portion is less than the extension length of the first support portion. The second extension portion is mainly used to provide additional support or connection points. Optionally, in some embodiments, the second extension portion can be used as a decorative component, or as an armrest, a support for the storage of the first bracket, etc. to enhance the overall aesthetic and structural stability.

[0039] Such as Figure 2A sofa bed frame as shown, the fastening and strengthening member 5 further has a third strengthening portion 53, the third strengthening portion 53 has a fastening connection end 50 for the connecting member 6 to pass through, the first strengthening portion 51, the second strengthening portion 52, and the third strengthening portion 53 enclose to form a receiving cavity 55, the receiving cavity 55 allows the first support portion 11 or the first extension portion 12 to extend into to form an unfolded state or a stored state, the first support portion 11 and the first extension portion 12 are provided with a mating connection end 14 that cooperates with the fastening connection end 50 and the connecting member 6, the fastening and strengthening member 5 further includes a fourth strengthening portion 54 connected to the lower side of the first strengthening portion 51 and / or the lower side of the second strengthening portion 52, the fourth strengthening portion 54 is used to limit the first support portion 11 or the first extension portion 12 from passing through the receiving cavity 55. Further, as a preferred embodiment of the present invention rather than a limitation, the fastening connection end can allow the connecting member to be connected to the fastening and strengthening member, so as to fix the first bracket, ensuring that when the sofa bed frame is converted to the unfolded state or the stored state, each component can be closely matched and not easily loosened.

[0040] Optionally, in some embodiments, the connecting member can be a connecting component such as a bolt, a pin, a screw, etc.

[0041] Specifically, the receiving cavity is formed by enclosing the first strengthening portion, the second strengthening portion, and the third strengthening portion. By providing the receiving cavity, the first support portion or the first extension portion can extend into or out of it, causing changes in the shape and orientation of the first bracket. While the volume of the sofa bed frame changes, the conversion between the unfolded and stored states is more smooth and flexible, and the structural stability is also enhanced.

[0042] Specifically, when the first support portion extends into the receiving cavity, the fastening and strengthening member is connected to the outside of the first support portion and the bottom frame connection portion, and the connecting member passes through the fastening connection end and the mating connection end of the first support portion, so that the fastening and strengthening member fixes the first support portion and the bottom frame connection portion, thereby forming a firm structure. At this time, the sofa bed frame is switched to the unfolded state, and the sliding of the second bracket allows the sofa bed to switch between the bed state and the sofa state. The fastening and strengthening member enables the sofa bed to maintain a stable structure in both the bed state and the sofa state, and it is not easy to shake or deform during the sliding process of the second bracket or the load-bearing process of the first bracket and the bottom frame.

[0043] Specifically, when the first extension part extends into the accommodating cavity, the fastening and strengthening member is connected to the outside of the first extension part and the chassis connection part. The connecting member passes through the fastening connection end and the mating connection end of the first extension part, so that the fastening and strengthening member fixes the first support part and the chassis connection part, thereby forming a firm structure. At this time, the sofa bed frame switches to the storage state, which can greatly reduce the occupied space of the sofa bed frame, thus facilitating the transportation of the sofa bed frame and saving storage costs. Specifically, the occupied space of the sofa bed frame in the unfolded state is 0.31 - 0.41 m 3 and the occupied space of the sofa bed frame in the storage state is 0.09 - 0.14 m 3 .

[0044] Optionally, in some embodiments, when the sofa bed frame is in the storage state, the upper side of the second extension part supports the lower side of the first support part. Optionally, in some embodiments, the contact surface of the second extension part matches the shape of the contact surface of the first support part. Preferably, the second extension part is straight and the first support part is straight

[0045] In addition, the fourth strengthening part is connected to the lower side of the first strengthening part and / or the lower side of the second strengthening part. Its main function is to limit the movement range of the first support part or the first extension part when passing through the accommodating cavity, prevent the first support part or the first extension part from moving excessively or disengaging. During the process of the fastening and strengthening member being connected and fixed, it not only plays a positioning role but also further enhances the structural stability of the sofa bed frame

[0046] Optionally, in some embodiments, there is one third strengthening part which is perpendicular to the first strengthening part and the second strengthening part respectively, and the third strengthening part is located outside the first support part. Of course, the third strengthening part can also be located inside towards the first support part

[0047] Optionally, in some embodiments, there are two third strengthening parts which are perpendicular to the first strengthening part and the second strengthening part respectively. The two third strengthening parts extend in parallel and are located outside and inside the first support part respectively

[0048] Optionally, in some embodiments, there are two third strengthening parts. The covering range of the third strengthening part located outside the first support part is larger than the covering range of the third strengthening part located inside the first support part

[0049] Optionally, in some embodiments, when the fourth strengthening part is connected to the lower side of the first strengthening part or the lower side of the second strengthening part, the area where the lower side of the accommodating cavity communicates with the outside is small, which can prevent the first support part or the first extension part from directly passing through the accommodating cavity

[0050] Optionally, in some embodiments, when the fourth reinforcing part is connected to the lower side of the first reinforcing part and the lower side of the second reinforcing part at the same time, the lower side of the accommodation cavity is close to a sealed state. When the first support part or the first extension part extends into the accommodation cavity for positioning, the fourth reinforcing part also plays a role in supporting the first support part or the first extension part to a certain extent.

[0051] As Figure 3 and Figure 8 shown in a sofa bed frame, the sliding mechanism 4 includes a guide rail 41 connected to the bottom frame 3, a second bracket sliding end 42 connected to the bottom of the second bracket 2, and a ball 43 located between the guide rail 41 and the second bracket sliding end 42. The guide rail 41 is provided with a guide rail limiting cavity 411 for the ball 43 to extend into, and the second bracket sliding end 42 is provided with a sliding fit end 421 that cooperates with and contacts the ball 43. Further, as a preferred embodiment of the present invention rather than a limitation, through the combined design of the guide rail, the ball, and the sliding fit end, the smooth sliding of the second bracket on the guide rail is achieved. The rolling of the ball in the guide rail limiting cavity reduces the friction and resistance during the sliding process, making it easier and faster for the sofa bed to switch to the bed state and the sofa state. Additionally, the rolling action of the ball effectively reduces the noise generated during the sliding process, improves the user experience. At the same time, since the rolling friction of the ball is much smaller than the sliding friction, it also reduces the wear between components and lowers the maintenance cost.

[0052] Specifically, the cooperation of the ball with the guide rail limiting cavity and the sliding fit end ensures the stability of the second bracket during the sliding process, preventing structural damage caused by shaking or deviation. The stability of the second bracket not only improves the overall quality of the sofa bed but also extends its service life.

[0053] Specifically, the guide rail limiting cavity and the sliding fit end are designed as arc-shaped grooves that cooperate with the ball, which can reduce the rolling friction of the ball.

[0054] Optionally, in some embodiments, the bottom of the second bracket and the second bracket sliding end can be detachably connected by connecting pieces such as screws and bolts.

[0055] Optionally, in some embodiments, the bottom of the second bracket and the second bracket sliding end can be connected by welding.

[0056] Optionally, in some embodiments, the bottom of the second bracket and the second bracket sliding end can be provided by integrally molding.

[0057] As Figure 8A sofa bed frame as shown, the sliding mechanism 4 further includes a sliding bracket 44 slidably connected to the guide rail 41. The sliding bracket 44 includes a sliding bracket body 441, sliding bracket connecting portions 442 located on both sides of the sliding bracket body 441, and a sliding bracket limiting groove 443 located between the sliding bracket body 441 and the sliding bracket connecting portions 442 for the sliding end 42 of the second bracket to extend into. The sliding bracket connecting portion 442 is provided with a clamping cavity 4421 for accommodating the ball 43. The two ends of the guide rail 41 are respectively provided with guide rail limiting ends 45 for limiting the sliding bracket 44 from detaching. Further, as a preferred embodiment rather than a limitation of the present invention, the sliding bracket is an intermediate component connecting the second bracket and the guide rail. When the second bracket moves, the sliding bracket moves synchronously through the cooperation of the ball and the guide rail limiting cavity, thereby reducing the contact between the second bracket and the guide rail. Through the sliding bracket connecting portions and the sliding bracket limiting grooves on both sides of the sliding bracket body, a more stable support and guidance are provided for the second bracket, effectively preventing the second bracket from shifting or shaking during the sliding process, thereby enhancing the overall stability of the sofa bed.

[0058] Specifically, when the second bracket slides, the sliding end of the second bracket contacts the ball and drives the sliding bracket to move on the guide rail through the ball.

[0059] Optionally, in some embodiments, the guide rail limiting end is a protrusion provided upward.

[0060] Optionally, in some embodiments, when the second bracket moves to both sides relative to the bottom frame respectively, the sliding bracket does not contact the guide rail limiting end. At this time, the setting of the guide rail limiting end facilitates the positioning during the installation of the sliding bracket and prevents it from detaching from the guide rail. The length of the sliding bracket is less than the distance between two groups of relatively arranged guide rail limiting ends.

[0061] Optionally, in some embodiments, the setting of the guide rail limiting end can be used to limit the continuous sliding of the sliding bracket, thereby forming a limiting effect.

[0062] In addition, the clamping cavity on the sliding bracket connecting portion provides a stable accommodation space for the ball and clamps and limits the ball, making the ball roll more smoothly in the guide rail limiting cavity, thereby reducing the friction and resistance during the sliding process and further improving the sliding performance of the second bracket.

[0063] Optionally, in some embodiments, the sliding bracket is made of a wear-resistant alloy material. Preferably, the sliding bracket is made of aluminum alloy.

[0064] Such as Figures 1 to 8A sofa bed frame is shown. A link assembly 7 is further provided between the bottom frame 3 and the second support 2. The bottom frame 3 is provided with a first crossbar 32 away from the first support 1 and a second crossbar 33 close to the first support 1. Both the first crossbar 32 and the second crossbar 33 are connected between two bottom frame connection parts 31. The link assembly 7 includes a first connection seat 71 connected to the first crossbar 32, a first articulated rod 711 connected to the first connection seat 71, a second connection seat 72 connected to one end of the second support 2, a second articulated rod 721 connected to the second connection seat 72, and a connection seat assembly located between the first articulated rod 711 and the second articulated rod 721. The second crossbar 33 is provided with a first buffer 81 that abuts against the connection seat assembly or the first articulated rod 711.

[0065] Specifically, the link assembly firmly connects the first crossbar of the bottom frame and the second support through the first connection seat, the first articulated rod, the second connection seat, the second articulated rod, and the connection seat assembly. This not only enhances the overall stability of the sofa bed in the unfolded state but also improves its load-bearing capacity, making the sofa bed safer and more reliable during use. The setting of the link assembly enables the sofa bed to be folded more compactly in the stored state. Through the flexible cooperation of multiple articulated rods and multiple connection seat assemblies, the sofa bed can be converted between the bed state and the sofa state without occupying too much space.

[0066] Specifically, the first buffer provided on the second crossbar abuts against the connection seat assembly, playing a role in buffering and shock absorption. When the sofa bed is in the process of state conversion, the first buffer can absorb part of the impact force and vibration, reduce noise and shaking, and improve the comfort and stability of the sofa bed.

[0067] Optionally, in some embodiments, when the sofa bed frame is converted to the sofa state, the first buffer abuts against the connection seat assembly.

[0068] Such as Figures 1 to 8A sofa bed frame as shown, the connecting seat assembly includes a third connecting seat 73 connected to the first hinge rod 711, a fourth connecting seat 74 connected to the second hinge rod 721, and a connecting plate 75 connected between the third connecting seat 73 and the fourth connecting seat 74. The connecting plate 75 is provided with a connecting plate extension end 751 extending away from the third connecting seat 73, and the connecting plate extension end 751 is provided with a connecting plate convex end 7511 extending towards the second hinge rod 721. The second hinge rod 721 is provided with a second buffer member 82 cooperating with the connecting plate convex end 7511, and the first buffer member 81 is used to abut and buffer against the third connecting seat 73 or the first hinge rod 711. Further, as a preferred embodiment of the present invention rather than a limitation, the connecting seat assembly forms a stable connecting bridge through the connection of the third connecting seat and the first hinge rod, and the connection of the fourth connecting seat and the second hinge rod, which can enhance the connection strength between the bottom frame and the second bracket, so that the sofa bed can maintain the structural stability and integrity in both the bed state and the sofa state.

[0069] Additionally, the settings of the connecting plate extension end and the connecting plate convex end enable better dispersion and buffering of the force during transmission. When the sofa bed undergoes state conversion, the cooperation between the connecting plate convex end and the second buffer member can reduce the direct impact and stress concentration between components, thereby extending the service life of the sofa bed.

[0070] Optionally, in some embodiments, when the sofa bed frame is converted to the bed state, the second buffer member abuts against the connecting plate convex end.

[0071] Optionally, in some embodiments, when the sofa bed frame is converted to the sofa state, the first buffer member abuts against the third connecting seat.

[0072] Optionally, in some embodiments, when the sofa bed frame is converted to the sofa state, the first buffer member abuts against the first hinge rod.

[0073] Specifically, when the second bracket slides to convert the sofa bed frame to the bed state, the second bracket drives the fourth connecting seat to move through the second hinge rod. The fourth connecting seat rotates through the connecting plate. While the connecting plate convex end gradually approaches the second buffer member on the second hinge rod, the connecting plate drives the third connecting seat and drives the first hinge rod to rotate until the first hinge rod is perpendicular or nearly perpendicular to the first crossbar.

[0074] When the second support slides so that the sofa bed frame is converted to the sofa state, the second support drives the fourth connecting seat, the connecting plate, and the third connecting seat to gradually move toward the first support and drives the first hinge rod to rotate. While the third connecting seat moves closer to and abuts against the first buffer member, the second hinge rod rotates until the connecting plate rotates toward the first support and approaches it. At this time, the connecting plate is perpendicular to the second cross bar or the connecting plate is inclined toward the first support.

[0075] A sofa bed includes the sofa bed frame as described above and a driving assembly 9 for driving the second support 2 to slide relative to the chassis 3. Specifically, by providing the driving assembly, the conversion process between the bed state and the sofa state of the sofa bed is more automated and convenient. The user only needs to press a button or pull a switch to drive the second support to slide on the chassis, realizing the conversion of the sofa bed state, without having to manually move or adjust the components laboriously. While driving the second support to slide, the driving assembly can also ensure the stability and balance of the sofa bed during the state conversion through precise control and adjustment, helping to reduce potential safety hazards caused by improper operation.

[0076] Optionally, in some embodiments, the driving assembly 9 includes a driving assembly connecting seat 91 connected to the chassis, a driving shaft 92 with one end connected to one end of the second support and passing through the driving assembly connecting seat, and a motor assembly 93 connected to the other end of the driving shaft and the other end of the second support. The driving assembly connecting seat 91 is fixed to the chassis through connecting members such as bolts and screws. A driving shaft connecting seat 921 is provided at one end of the driving shaft, and the driving shaft connecting seat fixes the driving shaft to one end of the second support through connecting members such as bolts and screws. The motor assembly is provided with a motor connecting seat 931, and the motor connecting seat fixes the motor assembly to the other end of the second support through connecting members such as bolts and screws.

[0077] Optionally, in some embodiments, casters 10 are provided at the front end of the second support, which can facilitate the sliding of the second support relative to the chassis.

[0078] Embodiment 1

[0079] As Figure 1 and Figure 2 shown, a sofa bed frame includes a chassis 3, and further includes a first support 1 extending along the upper side direction of the chassis 3, a second support 2 slidably connected to the chassis 3, and a sliding mechanism 4 connected between the second support 2 and the chassis 3. The first support 1 is provided with a first support portion 11 arranged in the vertical direction, the chassis 3 is provided with a chassis connecting portion 31 arranged in the horizontal direction, and a fastening and strengthening member 5 is connected between one end of the first support portion 11 and one end of the chassis connecting portion 31. The chassis 3, the first support 1, the second support 2, and the fastening and strengthening member 5 are made of iron material.

[0080] The fastening and strengthening member 5 includes a first strengthening portion 51 located outside the first support portion 11 and a second strengthening portion 52 located outside the chassis connection portion 31, and the projections of the first strengthening portion 51 and the second strengthening portion 52 are arranged in an L shape.

[0081] The use of the fastening and strengthening member 5 improves the structural stability of the sofa bed frame, reduces the shaking and deformation during stress, and thus extends the service life of the product. When the user leans back on the first support 1, the stress point will be dispersed to the first support 1 and the chassis 3 through the fastening and strengthening member 5, thereby reducing the tendency of the first support 1 to shake back and forth. When the user lies on the chassis 3, the stress point will be dispersed to the first support 1 and the chassis 3 through the fastening and strengthening member 5, thereby reducing the left - right shaking of the chassis 3. The first support 1 and the chassis 3 are evenly stressed, reducing the damage of structural components, ensuring the service life of the product, and improving the user's safety and experience during use.

[0082] Embodiment 2

[0083] As Figure 7 shown, on the basis of Embodiment 1, Embodiment 2 has the following implementation manner: The fastening and strengthening member 5, the first support portion 11, and the chassis connection portion 31 are fixedly connected by welding.

[0084] Embodiment 3

[0085] On the basis of Embodiment 1, Embodiment 3 has the following implementation manner: The fastening and strengthening member 5, the first support portion 11, and the chassis connection portion 31 are fixedly connected by riveting.

[0086] Embodiment 4

[0087] As Figure 2 shown, on the basis of Embodiment 1, Embodiment 4 has the following implementation manner: The fastening and strengthening member 5, the first support portion 11, and the chassis connection portion 31 can be fixedly connected by bolt connection.

[0088] Embodiment 5

[0089] On the basis of Embodiment 1, Embodiment 5 further has the following implementation manner: The first support 1 is provided with a first extension portion 12 connected to the other end of the first support portion 11, the first extension portion 12 extends towards the second support 2, the extension length of the first extension portion 12 is less than the extension length of the first support portion 11, the other end of the first support portion 11 is provided with a second extension portion 13 extending upwards, and the extension length of the second extension portion 13 is less than the extension length of the first support portion 11.

[0090] Embodiment 6

[0091] The difference between Embodiment 6 and Embodiment 5 is that the extension length of the first extension part 12 is equal to the extension length of the first support part 11.

[0092] Embodiment 7

[0093] As Figure 2 shown, based on Embodiment 5, Embodiment 7 has the following implementation manners: The fastening and strengthening member 5 further has a third strengthening part 53. There is one third strengthening part 53, and it is perpendicular to the first strengthening part 51 and the second strengthening part 52 respectively. The third strengthening part 53 is located outside the first support part 11. The third strengthening part 53 has a fastening connection end 50 for the connecting member 6 to pass through. The first strengthening part 51, the second strengthening part 52, and the third strengthening part 53 enclose to form a receiving cavity 55. The first support part 11 or the first extension part 12 extends into the receiving cavity 55 to form the unfolded state or the stored state of the first bracket 1. The first support part 11 and the first extension part 12 are provided with a mating connection end 14 that mates with the fastening connection end 50 and the connecting member 6. When the sofa bed frame is in the stored state, the upper side of the second extension part 13 supports the lower side of the first support part 11. The contact surface of the second extension part 13 matches the shape of the contact surface of the first support part 11.

[0094] Embodiment 8

[0095] As Figure 3 shown, the difference between Embodiment 8 and Embodiment 7 is that: There are two third strengthening parts 53, and they are perpendicular to the first strengthening part 51 and the second strengthening part 52 respectively. The two third strengthening parts 53 extend in parallel and are respectively located outside and inside the first support part 11. The covering range of the third strengthening part 53 located outside on the first support part 11 is greater than the covering range of the third strengthening part 53 located inside on the first support part 11. The second extension part 13 is straight-shaped, and the first support part 11 is straight-shaped.

[0096] Embodiment 9

[0097] Based on Embodiment 8, Embodiment 9 has the following implementation manners: The fastening and strengthening member 5 further includes a fourth strengthening part 54 connected to the lower side of the second strengthening part 52. The fourth strengthening part 54 is used to limit the first support part 11 or the first extension part 12 from passing through the receiving cavity 55.

[0098] Embodiment 10

[0099] As Figure 2As shown, the difference between Embodiment 10 and Embodiment 9 is that the fastening and strengthening member 5 further includes a fourth strengthening portion 54 connected to the lower side of the first strengthening portion 51 and the lower side of the second strengthening portion 52, and the fourth strengthening portion 54 is used to limit the first support portion 11 or the first extension portion 12 from passing through the accommodation cavity 55.

[0100] Embodiment 11

[0101] As Figure 3 shown, on the basis of Embodiment 10, Embodiment 11 further has the following implementation manner. The sliding mechanism 4 includes a guide rail 41 connected to the chassis 3, a second bracket sliding end 42 connected to the bottom of the second bracket 2, and a ball 43 located between the guide rail 41 and the second bracket sliding end 42. The guide rail 41 is provided with a guide rail limiting cavity 411 for the ball 43 to extend into, and the second bracket sliding end 42 is provided with a sliding mating end 421 that cooperates with and contacts the ball 43. The bottom of the second bracket 2 and the second bracket sliding end 42 can be detachably connected by a connecting member 6 such as a screw or a bolt.

[0102] Embodiment 12

[0103] The difference between Embodiment 12 and Embodiment 11 is that the bottom of the second bracket 2 and the second bracket sliding end 42 can be connected by welding.

[0104] Embodiment 13

[0105] As Figure 8 shown, on the basis of Embodiment 11, Embodiment 13 further has the following implementation manner. The sliding mechanism 4 further includes a sliding bracket 44 slidably connected to the guide rail 41. The sliding bracket 44 includes a sliding bracket main body 441, sliding bracket connecting portions 442 located on both sides of the sliding bracket main body 441, and a sliding bracket limiting groove 443 located between the sliding bracket main body 441 and the sliding bracket connecting portions 442 and into which the second bracket sliding end 42 extends. The sliding bracket connecting portion 442 is provided with a clamping cavity 4421 for accommodating the ball 43, and both ends of the guide rail 41 are respectively provided with guide rail limiting ends 45 for limiting the sliding bracket 44 from disengaging. The guide rail limiting end 45 is a protrusion arranged upward.

[0106] When the second bracket 2 moves to both sides relative to the chassis 3 respectively, the sliding bracket 44 does not contact the guide rail limiting end 45. At this time, the setting of the guide rail limiting end 45 facilitates the positioning of the sliding bracket 44 during installation and prevents it from disengaging from the guide rail. The length of the sliding bracket 44 is less than the length distance between two relatively arranged guide rail limiting ends 45.

[0107] Embodiment 14

[0108] The difference between Embodiment 14 and Embodiment 13 is that the arrangement of the guide rail limiting end 45 can be used to limit the continuous sliding of the sliding bracket 44, thereby forming a limiting effect.

[0109] Embodiment 15

[0110] As Figure 6 shown, on the basis of Embodiment 13, Embodiment 15 further has the following implementation manners. A connecting rod assembly 7 is further provided between the chassis 3 and the second bracket 2. The chassis 3 is provided with a first cross bar 32 away from the first bracket 1 and a second cross bar 33 close to the first bracket 1. Both the first cross bar 32 and the second cross bar 33 are connected between two chassis connecting parts 31. The connecting rod assembly 7 includes a first connecting seat 71 connected to the first cross bar 32, a first articulated rod 711 connected to the first connecting seat 71, a second connecting seat 72 connected to one end of the second bracket 2, a second articulated rod 721 connected to the second connecting seat 72, and a connecting seat assembly located between the first articulated rod 711 and the second articulated rod 721. The second cross bar 33 is provided with a first buffer 81 that abuts against the connecting seat assembly. The connecting seat assembly includes a third connecting seat 73 connected to the first articulated rod 711, a fourth connecting seat 74 connected to the second articulated rod 721, and a connecting plate 75 connected between the third connecting seat 73 and the fourth connecting seat 74. The connecting plate 75 is provided with a connecting plate extension end 751 extending away from the third connecting seat 73. The connecting plate extension end 751 is provided with a connecting plate convex end 7511 extending toward the second articulated rod 721. The second articulated rod 721 is provided with a second buffer 82 that cooperates with the connecting plate convex end 7511. The first buffer 81 is used to abut against the third connecting seat 73 for buffering.

[0111] Embodiment 16

[0112] As Figure 3 shown, on the basis of Embodiment 15, Embodiment 16 further has the following implementation manners. When the sofa bed frame is unfolded and stored, the connecting rod assembly 7 is connected to the sofa bed frame, and a space for placing the connecting rod assembly 7 is provided between the chassis 3 and the second bracket 2.

[0113] Embodiment 17

[0114] As Figures 1 to 8 shown, on the basis of Embodiment 1, Embodiment 17 further has the following implementation manners. The sofa bed includes the sofa bed frame as described above and a driving assembly 9 for driving the second bracket 2 to slide relative to the chassis 3. The front end of the second bracket is provided with casters 10.

[0115] The utility model utilizes the fastening and strengthening member 5 arranged between the first support portion 11 and the chassis connection portion 31. By increasing the additional supporting force, the connection between the first bracket 1 and the chassis 3 becomes more firm, preventing the first bracket 1 or the chassis 3 from shaking or deforming when subjected to local force, extending the service life of the product, reducing the safety hazards caused by component damage, and thus meeting the user's usage requirements. Through the cooperation of the driving component 9 and the casters 10, it is convenient for the user to switch the state of the sofa bed, reducing the uneven force on the sofa bed frame during the process of carrying and moving the second bracket.

[0116] Embodiment 18

[0117] As Figure 7 shown, on the basis of Embodiment 17, Embodiment 18 further has the following implementation manners. The driving component 9 includes a driving component connection seat 91 connected to the chassis 3, a driving shaft 92 with one end connected to one end of the second bracket 2 and passing through the driving component connection seat 91, and a motor component 93 connected to the other end of the driving shaft 92 and connected to the other end of the second bracket 2. The driving component connection seat 91 is fixed to the chassis 3 through connecting pieces 6 such as bolts and screws. One end of the driving shaft 92 is provided with a driving shaft connection seat 921, and the driving shaft connection seat 921 fixes the driving shaft 92 to one end of the second bracket 2 through connecting pieces 6 such as bolts and screws. The motor component 93 is provided with a motor connection seat 931, and the motor connection seat 931 fixes the motor component 93 to the other end of the second bracket 2 through connecting pieces 6 such as bolts and screws.

[0118] The above only further illustrates the technical content of the present utility model with embodiments to make it easier for readers to understand, but it does not mean that the implementation manners of the present utility model are limited to this. Any technical extension or re-creation made according to the present utility model is protected by the present utility model. The protection scope of the present utility model is subject to the claims.

Claims

1. A sofa bed frame, comprising a bottom frame (3), characterized in that: The invention also comprises a first bracket (1) extending along the upper side of the base frame (3), a second bracket (2) slidably connected to the base frame (3), and a sliding mechanism (4) connected between the second bracket (2) and the base frame (3), wherein the first bracket (1) is provided with a first supporting portion (11) arranged in a vertical direction, the base frame (3) is provided with a base frame connecting portion (31) arranged in a horizontal direction, and a fastening reinforcement member (5) is connected between one end of the first supporting portion (11) and one end of the base frame connecting portion (31).

2. A sofa bed frame according to claim 1, characterized in that: The fastening reinforcement member (5) comprises a first reinforcement portion (51) located outside the first support portion (11), and a second reinforcement portion (52) located outside the chassis connection portion (31), wherein the projections of the first reinforcement portion (51) and the second reinforcement portion (52) are arranged in an L shape.

3. The sofa bed frame according to claim 1, characterized in that: The fastening reinforcement member (5), the first support portion (11) and the bottom frame connection portion (31) are fixedly connected.

4. The sofa bed frame according to claim 2, characterized in that: The first bracket (1) is provided with a first extension portion (12) connected to the other end of the first support portion (11); the first extension portion (12) extends in the direction of the second bracket (2); the extension length of the first extension portion (12) is less than or equal to the extension length of the first support portion (11); the other end of the first support portion (11) is provided with a second extension portion (13) extending upwards; the extension length of the second extension portion (13) is less than the extension length of the first support portion (11).

5. A sofa bed frame according to claim 4, characterized in that: The fastening reinforcement member (5) is further provided with a third reinforcement portion (53), the third reinforcement portion (53) being provided with a fastening connection end (50) for the connecting member (6) to pass through, the first reinforcement portion (51), the second reinforcement portion (52) and the third reinforcement portion (53) enclosingly forming a receiving cavity (55), the receiving cavity (55) being provided for the first supporting portion (11) or the first extending portion (12) to extend into so as to form an expanded state or a stored state, the first supporting portion (11) and the first extending portion (12) being provided with a mating connection end (14) matingly connected to the fastening connection end (50) and the connecting member (6), the fastening reinforcement member (5) further comprising a fourth reinforcement portion (54) connected to the lower side of the first reinforcement portion (51) and / or the lower side of the second reinforcement portion (52), the fourth reinforcement portion (54) being used to restrict the first supporting portion (11) or the first extending portion (12) from passing through the receiving cavity (55).

6. The sofa bed frame according to claim 1, characterized in that: The sliding mechanism (4) comprises a guide rail (41) connected to the base frame (3), a second bracket sliding end (42) connected to the bottom of the second bracket (2), and a ball (43) located between the guide rail (41) and the second bracket sliding end (42); the guide rail (41) is provided with a guide rail limiting cavity (411) for the ball (43) to extend into, and the second bracket sliding end (42) is provided with a sliding mating end (421) for mating contact with the ball (43).

7. The sofa bed frame according to claim 6, characterized in that: The sliding mechanism (4) further comprises a sliding bracket (44) slidably connected to the guide rail (41), the sliding bracket (44) comprising a sliding bracket body (441), sliding bracket connecting parts (442) located on both sides of the sliding bracket body (441), and a sliding bracket limiting groove (443) located between the sliding bracket body (441) and the sliding bracket connecting part (442) and for the second bracket sliding end (42) to extend into, the sliding bracket connecting part (442) being provided with a locking cavity (4421) for accommodating the ball (43), and guide rail limiting ends (45) for limiting the disengagement of the sliding bracket (44) are respectively provided at both ends of the guide rail (41).

8. The sofa bed frame according to claim 1, characterized in that: A connecting rod assembly (7) is further provided between the base frame (3) and the second bracket (2); the base frame (3) is provided with a first cross bar (32) away from the first bracket (1), and a second cross bar (33) close to the first bracket (1); the first cross bar (32) and the second cross bar (33) are both connected between the two base frame connecting parts (31); the connecting rod assembly (7) comprises a first connecting seat (71) connected to the first cross bar (32), a first hinged rod (711) connected to the first connecting seat (71), a second connecting seat (72) connected to one end of the second bracket (2), a second hinged rod (721) connected to the second connecting seat (72), and a connecting seat assembly located between the first hinged rod (711) and the second hinged rod (721); the second cross bar (33) is provided with a first buffer (81) abutting against the connecting seat assembly or the first hinged rod (711).

9. The sofa bed frame according to claim 8, characterized in that: The connecting seat assembly comprises a third connecting seat (73) connected to the first hinge rod (711), a fourth connecting seat (74) connected to the second hinge rod (721), and a connecting plate (75) connected between the third connecting seat (73) and the fourth connecting seat (74), wherein the connecting plate (75) is provided with a connecting plate extending end (751) extending away from the third connecting seat (73), the connecting plate extending end (751) is provided with a connecting plate protruding end (7511) extending toward the second hinge rod (721), the second hinge rod (721) is provided with a second buffer (82) cooperating with the connecting plate protruding end (7511), and the first buffer (81) is used for abutting and buffering with the third connecting seat (73) or the first hinge rod (711).

10. Sofa bed, characterized by: It comprises the sofa bed frame according to any one of claims 1 to 9, and a driving assembly (9) for driving the second bracket (2) to slide relative to the base frame (3).

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