Multifunctional sofa bed frame

Abstract

The utility model relates to a multifunctional sofa bed frame which comprises a bottom frame, a backrest frame, an armrest mechanism, a turnover mechanism and a cushion frame, the bottom frame is horizontally arranged, the backrest frame is vertically and fixedly connected to one end of the bottom frame, and the armrest mechanism is vertically and fixedly connected to the other end of the bottom frame; one end of the turnover mechanism is rotationally connected with the bottom frame, the other end of the turnover mechanism is fixedly connected with the seat cushion frame and is in sliding connection with the armrest mechanism, the armrest mechanism is located on the outer side of the seat cushion frame, and when the seat cushion frame is unfolded or folded, the seat cushion frame horizontally moves along the armrest mechanism through the turnover mechanism so as to be close to or away from the bottom frame. The multifunctional sofa bed frame has the advantages of being simple in structure, good in stability and smooth in state switching.

Description

Technical Field

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

[0002] A sofa bed is a new type of furniture that users can switch between two states: a seat and a recliner according to their needs. Most existing sofa beds achieve the switch between the two states by setting a flip or folding structure between the base frame and the cushion frame to shrink or extend the sofa bed as a whole; then the drive mechanism is used to achieve the automatic switching effect. However, since the flip or folding structure is long and the two ends are connected to the base frame and the cushion frame respectively, the sofa bed is prone to shaking during the state switching process, causing the state switching of the sofa bed to be stuck or not smooth, which reduces the user experience of the sofa bed. Summary of the invention

[0003] Based on this, the purpose of the utility model is to provide a multifunctional sofa bed frame, which has the advantages of simple structure, good stability and smooth switching state.

[0004] A multifunctional sofa bed frame comprises a base frame, a backrest frame, an armrest mechanism, a flipping mechanism and a cushion frame; the base frame is horizontally arranged, the backrest frame is vertically fixedly connected to one end of the base frame, and the armrest mechanism is vertically fixedly connected to the other end of the base frame; one end of the flipping mechanism is rotatably connected to the base frame, and the other end thereof is fixedly connected to the cushion frame and slidably connected to the armrest mechanism; the armrest mechanism is located outside the cushion frame; when unfolded or folded, the cushion frame moves horizontally along the armrest mechanism through the flipping mechanism, thereby approaching or moving away from the base frame.

[0005] The multifunctional sofa bed frame of the utility model has a turning mechanism whose one end is connected to the base frame, and whose other end is connected to the cushion frame and is slidably connected to the armrest mechanism, so that the turning mechanism has better stability and is not easy to shake during the whole operation process, thereby improving the smoothness of the sofa bed state switching.

[0006] Furthermore, the armrest mechanism includes two oppositely arranged armrests, the cushion frame is located between the two armrests, the armrests are in an inverted U-shape on the vertical plane, and the ends of one arm of the two inverted U-shape armrests are respectively vertically fixed to the top of the two ends of the base frame away from the backrest frame, and the other arms of the two inverted U-shape armrests are located on the side of the base frame away from the backrest frame.

[0007] Furthermore, the flipping mechanism includes a first connecting rod, a second connecting rod, a third connecting rod and a sliding rod which are hinged in sequence, one end of the first connecting rod is rotatably connected to an end of the base frame away from the backrest frame; one end of the second connecting rod is rotatably connected to the other end of the first connecting rod, and the other end of the second connecting rod is rotatably connected to one end of the third connecting rod; one end of the third connecting rod away from the second connecting rod is rotatably connected to one end of the sliding rod, and the other end of the sliding rod is slidably connected to the horizontal section of the armrest and fixedly connected to the cushion frame.

[0008] Furthermore, the relative inner sides of the horizontal sections of the two armrests are provided with slide grooves; the sliding rod is provided with a pulley, and the pulley is clamped in the slide groove. By providing the built-in slide groove on the armrest, dust, hair, etc. are not easy to fall into the slide groove, causing the pulley to slide and jam, thereby affecting the state switching of the sofa bed frame.

[0009] Furthermore, a limiting member is fixedly provided on the base frame, and the limiting member and the flip mechanism are located on the same vertical plane. When the first connecting rod rotates around the base frame toward the backrest frame and is in a horizontal state, the first connecting rod abuts against the limiting member.

[0010] Furthermore, two limit posts are fixedly provided on the second connecting rod, and the two limit posts are respectively located on both sides of the third connecting rod close to one end of the second connecting rod; when the sliding rod slides to the end of the sliding groove close to the base frame, the third connecting rod abuts the limit post close to the side of the base frame; when the sliding rod slides to the end of the sliding groove away from the base frame, the third connecting rod abuts the limit post away from the side of the base frame.

[0011] Furthermore, both sides of one end of the cushion frame are respectively fixedly connected to the sliding rod on the same side, and a plurality of casters are fixedly arranged below the other end; the caster comprises a square tube, two connecting parts and a wheel; one end of the square tube is fixedly connected to the lower side of the end of the cushion frame away from the base frame, the two connecting parts are spaced and arranged in parallel, one end of the square tube is respectively fixedly connected to both sides of the end of the square tube away from the cushion frame, and the other end of the square tube is respectively rotatably connected to both sides of the wheel, and the direction of the wheel is consistent with the direction of the slide. When in use, hair on the ground can pass smoothly over the wheel to avoid hair being stuck between the square tube and the wheel, which affects the smooth sliding of the caster.

[0012] Furthermore, it also includes a first crossbar and a driving mechanism, wherein the two ends of the first crossbar are respectively fixedly connected to the two armrests vertically; the driving mechanism includes a guide rail, a sliding member and a driving motor; the guide rail is fixedly arranged below the seat cushion frame and is arranged parallel to the slide groove; one end of the sliding member is fixedly connected to the first crossbar, and the other end thereof is slidably connected to the guide rail; the driving motor is used to drive the guide rail to slide on the sliding member, thereby driving the seat cushion frame to move horizontally along the slide groove. The first crossbar enhances the stability of the two armrests and bears the load of the driving mechanism.

[0013] Furthermore, it also includes a second crossbar, the two ends of which are respectively vertically fixed to the two opposite sides of the seat cushion frame and are vertically arranged with the guide rail, so as to strengthen the structural strength of the seat cushion frame and improve the bearing capacity of the seat cushion frame for the driving mechanism.

[0014] Furthermore, the backrest frame includes a wall-leaving portion and a load-bearing portion; one end of the wall-leaving portion is vertically fixedly connected to the base frame, and the other end of the wall-leaving portion is vertically fixedly connected to the load-bearing portion; the base frame and the load-bearing portion are located on the same side of the wall-leaving portion and are arranged opposite to each other; the connection between the base frame and the wall-leaving portion and the connection between the wall-leaving portion and the load-bearing portion are both provided with a first reinforcement member; the connection between the two arms of the inverted U-shaped handrail and the horizontal section is provided with a second reinforcement member. The first reinforcement member increases the overall structural strength and connection stability of the base frame and the backrest frame, and the second reinforcement member increases the structural strength and connection stability of a single handrail.

[0015] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the multifunctional sofa bed frame of the present application in a retracted state;

[0017] Figure 2 This is a schematic structural diagram of the multifunctional sofa bed frame of the present application in an unfolded state.

[0018] In the figure:

[0019] 1. chassis; 11. first reinforcement member; 12. limiting member;

[0020] 2. Backrest; 21. Wall-supporting part; 22. Load-bearing part;

[0021] 3. Handrail mechanism; 31. Handrail; 311. Intermediate tube; 312. Bending member; 3121. Sliding groove; 32. Second reinforcing member; 33. First crossbar;

[0022] 4. Flipping mechanism; 41. First connecting rod; 42. Second connecting rod; 421. Limiting column; 43. Third connecting rod; 44. Sliding rod;

[0023] 5. Cushion frame; 51. Caster; 511. Square tube; 512. Connecting part; 513. Wheel part; 52. Second cross bar;

[0024] 6. Driving mechanism; 61. Guide rail; 62. Sliding member; 63. Driving motor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "vertical direction", "upper", "lower", "horizontal" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-2 The present application provides a multifunctional sofa bed frame, including a base frame 1, a backrest frame 2, an armrest mechanism 3, a flip mechanism 4, a cushion frame 5 and a driving mechanism 6.

[0029] The backrest frame 2 is vertically fixed to one end of the base frame 1, and the armrest mechanism 3 is vertically fixed to the other end of the base frame 1; one end of the flip mechanism 4 is rotatably connected to the base frame 1, and the other end of the flip mechanism 4 is fixed to the cushion frame 5, and is slidably connected to the armrest mechanism 3. The driving mechanism 6 is arranged on the cushion frame 5, and its movable end is fixed to the armrest mechanism 3. When folding or unfolding, the driving mechanism 6 is started, and the cushion frame 5 moves horizontally along the armrest mechanism 3 through the flip mechanism 4, so as to approach or move away from the base frame 1 and the backrest frame 2, so as to realize the contraction and unfolding of the sofa bed frame, and achieve the dual functions of the sofa bed frame being able to sit or lie.

[0030] In the present embodiment, the base frame 1 is a rectangular frame, which is arranged horizontally. The backrest frame 2 includes a wall-supporting portion 21 and a load-bearing portion 22. The wall-supporting portion 21 is two long tubes, one end of which is respectively vertically fixedly connected to the upper ends of one side of the base frame 1, and is used to lean against the wall. The load-bearing portion 22 is a rectangular frame with a width smaller than that of the base frame 1, which is arranged horizontally, and the two ends of one side are respectively fixedly connected to one end of the two long tubes away from the base frame 1, and the other side is located above the base frame 1. In the present application, a storage area is formed between the base frame 1 and the load-bearing portion 22, which can be used to store cushions. In other embodiments, the load-bearing portion 22 is a horizontal tube fixedly connected to the two long tubes of the wall-supporting portion 21. In another embodiment, the load-bearing portion 22 is a frame of any other shape, one side of the frame is fixedly connected to the two long tubes of the wall-supporting portion 21, and the frame as a whole is located above the base frame 1.

[0031] Furthermore, a first reinforcement 11 is provided at the vertical connection between the base frame 1 and the wall portion 21 and at the vertical connection between the wall portion 21 and the load-bearing portion 22. In the present embodiment, the first reinforcement 11 is triangular in shape and is used to increase the overall structural strength and connection stability of the base frame 1 and the back frame 2.

[0032] The armrest mechanism 3 includes two armrests 31, which are in an inverted U shape on the vertical plane. The ends of one arm of the inverted U shape of the two armrests 31 are respectively vertically fixed to the upper ends of the two ends of one side of the base frame 1 away from the backrest frame 2, and the other arm of the inverted U shape of the two armrests 31 is located on the side of the base frame 1 away from the backrest frame 2.

[0033] In this embodiment, the armrest 31 includes an intermediate tube 311 and a bending piece 312; one end of the intermediate tube 311 is vertically connected to one end of the bending piece 312, and the other end of the intermediate tube 311 is vertically connected to the base frame 1; the bending piece 312 is L-shaped, and its end away from the intermediate tube 311 is located on the same vertical plane as the intermediate tube 311 and is arranged parallel to each other.

[0034] Furthermore, a second reinforcement member 32 is provided at the vertical connection between the middle tube 311 and the bending member 312 and at the bending portion of the bending member 312 . In the present embodiment, the second reinforcement member 32 is generally rectangular and is used to increase the structural strength and connection stability of the single handrail 31 .

[0035] Furthermore, the armrest mechanism 3 further includes a first cross bar 33 , both ends of which are respectively vertically fixed to the two armrests 31 and are located at one end of the two armrests 31 away from the base frame 1 , so as to enhance the stability of the two armrests 31 .

[0036] Furthermore, a plurality of anti-skid foot supports are fixedly provided at the bottom ends of the base frame 1 and the armrest mechanism 3, so as to increase the friction between the sofa bed frame and the ground and prevent the sofa bed frame from sliding, thereby facilitating the switching state of the sofa bed frame.

[0037] The flip mechanism 4 includes a first connecting rod 41, a second connecting rod 42, a third connecting rod 43 and a sliding rod 44 which are hinged in sequence. One end of the first connecting rod 41 is rotatably connected to the end of the intermediate tube 311 away from the bending tube. One end of the second connecting rod 42 is rotatably connected to the end of the first connecting rod 41 away from the intermediate tube 311, and the other end of the second connecting rod 42 is rotatably connected to one end of the third connecting rod 43; one end of the third connecting rod 43 away from the second connecting rod 42 is rotatably connected to one end of the sliding rod 44, and the other end of the sliding rod 44 is slidably connected to the armrest 31 on the same side and fixedly connected to the cushion frame 5.

[0038] Furthermore, a slide groove 3121 is provided on the relative inner sides of the inverted U-shaped horizontal sections of the two armrests 31, that is, the relative inner sides of the horizontal sections of the two bending parts 312. Two pulleys are arranged at intervals on the sliding rod 44, and the pulleys are clamped in the slide groove 3121. The sliding rod 44 can move horizontally along the armrest 31 through the slide groove 3121 and the pulleys. In the present application, by providing the built-in slide groove 3121 on the armrest 31, dust, hair, etc. are not easy to fall into the slide groove 3121, causing the slide of the pulley to be stuck, thereby affecting the state switching of the sofa bed frame.

[0039] Furthermore, limit members 12 are fixedly provided on the opposite side edges of the base frame 1, and the limit members 12 and the flip mechanism 4 are located on the same vertical plane. When the first connecting rod 41 rotates around one end of the middle tube 311 toward the backrest frame 2 until the first connecting rod 41 abuts against the upper end of the limit member 12 and the first connecting rod 41 is in a horizontal state, it will no longer continue to rotate in this direction.

[0040] Further, two limiting posts 421 are fixedly provided on the second connecting rod 42, and the two limiting posts 421 are respectively located on both sides of the end of the third connecting rod 43 close to the second connecting rod 42, and are used to limit the rotation of the third connecting rod 43. When the sliding rod 44 slides toward the end of the armrest 31 close to the base frame 1, and pushes the third connecting rod 43 and the first connecting rod 41 to rotate toward the backrest frame 2, until the third connecting rod 43 abuts against the limiting posts 421 on the side close to the base frame 1 and stops rotating, the second connecting rod 42 is generally in a vertical state, and the sliding rod 44 slides to the end of the armrest 31 close to the base frame 1. When the sliding rod 44 slides toward the end of the armrest 31 away from the base frame 1, and drives the third connecting rod 43 and the first connecting rod 41 to rotate away from the backrest frame 2, until the third connecting rod 43 abuts against the limiting posts 421 on the side away from the base frame 1 and stops rotating, the second connecting rod 42 is in a horizontal state, and the sliding rod 44 slides to the end of the armrest 31 away from the base frame 1.

[0041] The cushion frame 5 is a rectangular frame, which is horizontally arranged and located between the two armrests 31. The two sides of one end are respectively fixedly connected to the sliding rod 44 on the same side, and a plurality of casters 51 are fixedly arranged below the other end for sliding on the ground. When the sliding rods 44 on both sides slide along the slide groove 3121 on the armrest 31 on the same side, the cushion frame 5 is driven to move horizontally, thereby approaching or moving away from the base frame 1. When the sliding rod 44 slides to the end of the slide groove 3121 close to the base frame 1, the end of the cushion frame 5 close to the base frame 1 is located above the base frame 1, and the sofa bed frame is in a retracted state as a whole, achieving the function of a seat. When the sliding rod 44 slides to the end of the slide groove 3121 away from the base frame 1, the end of the cushion frame 5 close to the base frame 1 is located above the first cross bar 33, and the length of the sofa bed frame is elongated and in an expanded state, achieving the function of a recliner.

[0042] Furthermore, the caster 51 includes a square tube 511, two connecting parts 512 and a wheel part 513. One end of the square tube 511 is fixedly connected to the lower part of the end of the cushion frame 5 away from the base frame 1; the two connecting parts 512 are spaced and arranged in parallel, one end of which is respectively fixedly connected to the two sides of the end of the square tube 511 away from the cushion frame 5, and the other end thereof is respectively rotatably connected to the two sides of the wheel part 513; the direction of the wheel part 513 is consistent with the direction of the slide groove 3121. In this embodiment, the connecting part 512 is a triangular piece. Compared with other industrial general casters 51, when the caster 51 in the present application is in use, the hair on the ground can pass smoothly above the wheel part 513, avoiding the hair from being stuck between the square tube 511 and the wheel part 513, which affects the smooth sliding of the caster 51.

[0043] The driving mechanism 6 includes a guide rail 61, a sliding member 62 and a driving motor 63. The guide rail 61 is fixedly arranged below the cushion frame 5 and is arranged parallel to the slide groove 3121. One end of the sliding member 62 is fixedly connected to the first cross bar 33, and the other end of the sliding member 62 is slidably connected to the guide rail 61. The driving motor 63 is fixedly arranged below the cushion frame 5 and is used to drive the guide rail 61 to slide on the sliding member 62. When the driving motor 63 is started, the guide rail 61 moves relative to the sliding member 62 and drives the cushion frame 5 to move horizontally along the slide groove 3121, so that the sofa bed frame is retracted or expanded.

[0044] Furthermore, a second cross bar 52 is provided in the middle of the seat cushion frame 5, and both ends of the second cross bar 52 are respectively vertically fixed to the opposite side edges of the seat cushion frame 5 and are vertically arranged with the guide rail 61, so as to strengthen the structural strength of the seat cushion frame 5 and improve the load-bearing capacity of the seat cushion frame 5 for the driving mechanism 6.

[0045] The sofa seat of the present application has two states: a retracted state and an expanded state.

[0046] When the sofa bed frame is in the retracted state, the sliding rod 44 slides to the end of the slide groove 3121 close to the bottom frame 1, the first connecting rod 41 abuts against the limiting member 12 and is in a horizontal state, the second connecting rod 42 is substantially in a vertical state, the third connecting rod 43 abuts against the limiting column 421 close to one side of the bottom frame 1, and the end of the cushion frame 5 close to the bottom frame 1 is located above the bottom frame 1. The sofa bed frame realizes the function of a seat.

[0047] The driving motor 63 starts and runs forward, the guide rail 61 slides on the sliding member 62 and drives the cushion frame 5 to move horizontally, driving the sliding rod 44 to slide to the end of the slide slot 3121 away from the bottom frame 1, and the third connecting rod 43 and the first connecting rod 41 rotate away from the backrest frame 2 until the third connecting rod 43 abuts against the limit column 421 away from the bottom frame 1, the second connecting rod 42 is in a horizontal state, and the end of the cushion frame 5 close to the bottom frame 1 is located above the first cross bar 33. The length of the sofa bed frame is extended, and the cushion stored in the storage area is moved between the bottom frame 1 and the cushion frame 5 to realize the reclining function.

[0048] The sofa bed frame of the present application can not only realize the switching between the two states of contraction and expansion, and realize the dual functions of sitting and lying; and the two ends of the flip mechanism 4 are respectively subjected to force on the base frame 1 and the armrest 31, and the cushion frame 5 is fixedly connected to the flip mechanism 4, so that the sofa bed frame is more stable and smooth during the state switching process; and the built-in sliding groove 3121 on the armrest 31 can prevent dust and hair from falling in and affecting the sliding of the pulley, and the setting of the caster 51 can prevent hair from clogging and affecting the sliding of the caster 51, thereby causing the sofa bed frame state switching to be stuck.

[0049] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. A multifunctional sofa bed frame, characterized in that: It includes a base frame, a backrest frame, an armrest mechanism, a flipping mechanism and a cushion frame; the base frame is horizontally arranged, the backrest frame is vertically fixed to one end of the base frame, and the armrest mechanism is vertically fixed to the other end of the base frame; one end of the flipping mechanism is rotatably connected to the base frame, and the other end is fixed to the cushion frame and slidably connected to the armrest mechanism, the armrest mechanism is located at the outside of the cushion frame, and when unfolded or folded, the cushion frame moves horizontally along the armrest mechanism through the flipping mechanism, thereby approaching or moving away from the base frame.

2. The multifunctional sofa bed frame according to claim 1, characterized in that: The armrest mechanism includes two armrests arranged opposite to each other, the cushion frame is located between the two armrests, and the armrests are in an inverted U shape on the vertical plane. The ends of one arm of the two inverted U-shaped armrests are respectively vertically fixed to the top of the two ends of the base frame away from the backrest frame, and the other arms of the two inverted U-shaped armrests are located on the side of the base frame away from the backrest frame.

3. The multifunctional sofa bed frame according to claim 2, characterized in that: The flipping mechanism includes a first connecting rod, a second connecting rod, a third connecting rod and a sliding rod which are hinged in sequence, one end of the first connecting rod is rotatably connected to an end of the base frame away from the backrest frame; one end of the second connecting rod is rotatably connected to the other end of the first connecting rod, and the other end of the second connecting rod is rotatably connected to one end of the third connecting rod; one end of the third connecting rod away from the second connecting rod is rotatably connected to one end of the sliding rod, and the other end of the sliding rod is slidably connected to the horizontal section of the armrest and fixedly connected to the cushion frame.

4. The multifunctional sofa bed frame according to claim 3, characterized in that: The opposite inner sides of the horizontal sections of the two handrails are provided with sliding grooves; the sliding rod is provided with a pulley, and the pulley is clamped in the sliding groove.

5. The multifunctional sofa bed frame according to claim 4, characterized in that: A limiting member is fixedly disposed on the base frame, and the limiting member and the flip mechanism are located on the same vertical plane. When the first connecting rod rotates around the base frame toward the backrest frame and is in a horizontal state, the first connecting rod abuts against the limiting member.

6. The multifunctional sofa bed frame according to claim 5, characterized in that: Two limit posts are fixed on the second connecting rod, and the two limit posts are respectively located on both sides of the third connecting rod close to one end of the second connecting rod; when the sliding rod slides to the end of the sliding groove close to the base frame, the third connecting rod abuts the limit posts close to the side of the base frame; when the sliding rod slides to the end of the sliding groove away from the base frame, the third connecting rod abuts the limit posts away from the side of the base frame.

7. The multifunctional sofa bed frame according to claim 4, characterized in that: Both sides of one end of the cushion frame are respectively fixedly connected to the sliding rod on the same side, and a plurality of casters are fixedly provided at the lower part of the other end; the caster comprises a square tube, two connecting parts and a wheel part; one end of the square tube is fixedly connected to the lower part of the end of the cushion frame away from the base frame, the two connecting parts are spaced apart and arranged in parallel, one end of the square tube is respectively fixedly connected to both sides of the end of the square tube away from the cushion frame, and the other end of the square tube is respectively rotatably connected to both sides of the wheel part, and the direction of the wheel part is consistent with the direction of the slide groove.

8. The multifunctional sofa bed frame according to claim 4, characterized in that: It also includes a first cross bar and a driving mechanism, wherein the two ends of the first cross bar are respectively fixedly connected vertically to the two armrests; the driving mechanism includes a guide rail, a sliding member and a driving motor; the guide rail is fixedly arranged under the seat cushion frame and is arranged parallel to the slide groove; one end of the sliding member is fixedly connected to the first cross bar, and the other end thereof is slidably connected to the guide rail; the driving motor is used to drive the guide rail to slide on the sliding member, thereby driving the seat cushion frame to move horizontally along the slide groove.

9. The multifunctional sofa bed frame according to claim 8, characterized in that: It also includes a second cross bar, the two ends of which are respectively vertically fixed to the opposite two sides of the seat cushion frame and are vertically arranged with the guide rail.

10. The multifunctional sofa bed frame according to claim 2, characterized in that: The backrest frame includes a wall-leaving portion and a load-bearing portion; one end of the wall-leaving portion is vertically fixedly connected to the base frame, and the other end of the wall-leaving portion is vertically fixedly connected to the load-bearing portion, and the base frame and the load-bearing portion are located on the same side of the wall-leaving portion and are arranged opposite to each other; a first reinforcement member is provided at the connection between the base frame and the wall-leaving portion and at the connection between the wall-leaving portion and the load-bearing portion; a second reinforcement member is provided at the connection between the two arms of the inverted U-shaped handrail and the horizontal section.

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