Lift-out bed frame

Abstract

The present utility model relates to the technical field of sofa beds. Disclosed is a lift-out bed frame, comprising a base, wherein a support frame is fixedly provided on two sides of the base; a rear bracket and a front bracket are fixedly provided at the two ends of the support frame, respectively; the rear bracket is connected to a back frame by means of a first folding traction mechanism; one end of a seat frame I is rotationally connected to the top of the front bracket by means of a support lug I, and a joining arm is rotationally connected to the other end of the seat frame I; the other end of the joining arm is rotationally connected to a seat frame II; and a support lug II is fixedly provided at the other end of the seat frame II; a support leg I is movably connected to the support lug II; a support leg II is fixedly connected to the middle of the joining arm; and a folding arm I and a folding arm II are connected to the two sides of the support leg II; and a second folding traction mechanism and a locking lug are provided at the end of the seat frame I that is located on the front bracket. In the present utility model, the switch between a sofa and a bed can be more stable and effortless; in a sofa state, the support between the seat frames is more stable, and a seat surface is flatter; and in a bed state, the lift-out bed frame can be more stable and reliable, thereby facilitating transport.

Description

[0001] A Lifting Bed Frame. This utility model belongs to the field of sofa bed technology, specifically to a lifting bed frame. Background: Existing sofas can be transformed into beds to increase their versatility. Most existing sofa beds use manual folding when switching between them. Firstly, the legs don't fold automatically, making the switching operation laborious. Secondly, after switching to a bed, the bed lacks a locking mechanism. When the ends of the bed are lifted, the switching state is entered, causing the bed to fold, resulting in instability. To address this issue, we have designed and proposed a lifting bed frame. Summary of the Utility Model: This utility model aims to address the shortcomings of existing sofa beds, such as the difficulty in switching and the instability of the bed when transported in the bed state. This lifting bed frame makes switching between sofas more stable and convenient. In the sofa state, it provides more stable support between the seat frame and a flatter seat surface. In the bed state, it provides greater stability, reliability, and ease of transport. To achieve the above-mentioned object, the present invention adopts the following technical solutions: a lifting bed frame is designed, comprising a base, a back frame is connected to the rear of the base in a foldable manner, a seat frame 1 and a seat frame 2 are connected to the front of the base in a lifting and folding manner, support frames are fixedly provided on both sides of the base, and a rear bracket and a front bracket are fixedly provided at both ends of the support frame; an L-shaped bracket is formed between the rear bracket and the support frame, the back frame is connected to the rear bracket via a first folding traction mechanism, and blocking blocks are fixedly provided on both sides of the support frame, the blocking blocks are used to block the first folding mechanism and limit the back frame from folding upward to a maximum angle; a T-shaped bracket is formed between the front bracket and the support frame, one end of the seat frame 1 is rotatably connected to the top of the front bracket via a first support ear, and the other end is rotatably connected to a connecting arm, the other end of the connecting arm is rotatably connected to the seat frame 2, and the other end of the seat frame 2 is fixedly provided with a second support ear; a first support leg is movably connected to the second support ear, a second support leg is fixedly connected to the middle of the connecting arm, and both sides of the second support leg are rotatably connected to a first folding arm and a second folding arm in a coaxial manner. The other end of the folding arm 2 is rotatably connected to the top of the front bracket; a disc portion is provided at the top of the support leg 1, and the pivot points of the support ear 2 and the folding arm 1 are rotatably connected on both sides of the disc portion in a symmetrical manner; the end of the seat frame 1 located at the front bracket is provided with a second folding traction mechanism and a locking ear, and the locking ear is L-shaped. After the seat frame 1 and the seat frame 2 are fully unfolded, the free end of the back frame is placed on the locking ear to lock the seat frame 1 and the seat frame 2.Furthermore, the first folding and pulling mechanism includes a suspension rod, a first connecting rod, a second connecting rod, and a support. The support is fixedly mounted on the back frame. The suspension rod and the first connecting rod are rotatably connected to the support. The suspension rod is located above the first connecting rod. The other end of the suspension rod is rotatably connected to the upper end of the rear bracket. The other end of the first connecting rod is rotatably connected to the second connecting rod. The other end of the second connecting rod is rotatably connected to the lower end of the rear bracket. A torsion spring is mounted on the rotating shaft of the first and second connecting rods. The two torsion arms of the torsion spring are respectively fixed to the first and second connecting rods. Furthermore, the blocking block has an oblique cutout on the side corresponding to the first folding and pulling mechanism for blocking the second connecting rod. Furthermore, the connecting arm and the second supporting leg form a T-shaped structure. The first and second sitting frames are symmetrically rotatably connected to the ends of the connecting arm. Furthermore, the rotating axis points of the second supporting ear and the first folding arm are co-centered with the circular point of the disc portion. Furthermore, the second folding traction mechanism includes a third link, a fourth link, and a tension spring. One end of the third link is rotatably connected to the end of the first seat frame, and the other end is rotatably connected to the fourth link. The middle portion of the fourth link is rotatably connected to the support frame. The other end of the fourth link is fixedly connected to the tension spring, and the other end of the tension spring is fixed to the bottom end of the front bracket. The present invention provides a lifting bed frame with the following beneficial effects:

[0002] (1) The legs on the seat frame 1 and the seat frame 2 of the present invention can be folded automatically during the process of lifting and folding, without the need for manual folding, which facilitates switching between sofa beds. In addition, by arranging a connecting arm between the seat frame 1 and the seat frame 2, the connecting arm and the leg 2 are fixedly arranged to form a T-shaped whole, which is conducive to better folding of the seat frame 1 and the seat frame 2 during the process of lifting and folding. After folding, the leg 2 can be supported between the seat frame 1 and the seat frame 2, so that the top surface of the seat frame 2 after folding is flatter and has stable support.

[0003] (2) The present invention provides a first folding traction mechanism on the back frame, which makes the back frame more convenient to fold. A second folding traction mechanism is provided at one end of the seat frame, so that the seat frame has a traction force during the folding process, which facilitates the folding of the seat frames on the one hand and makes the folding easier on the other hand.

[0004] (3) When the present invention is in the bed state, a locking lug is provided at one end of the seat frame, so that the back frame can be locked in the locking lug, thereby locking the first and second seat frames. Without lifting the back frame, the first and second seat frames cannot be lifted or folded. This makes the lifting bed frame in the bed state more stable, reliable, and easy to carry. In the accompanying drawings: Figure 1 is a schematic diagram of the structure of the present invention in the process of lifting and folding; Figure 2 is a schematic diagram of the structure of the present invention in the sofa state; Figure 3 is a schematic diagram of the structure of the present invention in the bed state; The markings in the figure are: 1, base; 2, support frame; 21, rear bracket; 22, front bracket; 3, back frame; 301, suspension rod; 302, connecting rod 1; 303, connecting rod 2; 31, support; 32, torsion spring; 33, blocking block; 4, sitting frame 1; 41, support ear 1; 401, connecting rod 3; 402, connecting rod 4; 403, tension spring; 5, sitting frame 2; 51, support ear 2; 52, support leg 1; 521, disc portion; 53, folding arm 1; 6, connecting arm; 61, support leg 2; 62, folding arm 2; 7, Lock lug. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following, in conjunction with the accompanying drawings, provides a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments represent only a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort fall within the scope of protection of the present invention. In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood broadly. For example, "connected" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances. The structural features of this utility model will now be described in detail with reference to the accompanying drawings. Referring to Figures 1-3, a lifting bed frame includes a base 1, a back frame 3 foldably connected to the rear of the base 1, and seat frames 1 4 and 2 5 foldably connected to the front of the base 1. The base 1 is characterized in that support frames 2 are fixedly mounted on both sides of the base 1, and rear and front frames 21 and 22 are fixedly mounted on the ends of the support frame 2, respectively. An L-shaped bracket is formed between the rear bracket 21 and the support frame 2. The rear bracket 21 is connected to the back frame 3 through a first folding traction mechanism. The first folding traction mechanism includes a suspension rod 301, a connecting rod 1 302, a connecting rod 2 303 and a support 31. The support 31 is fixedly set on the back frame 3. The suspension rod 301 and the connecting rod 1 302 are rotatably connected to the support 31. The suspension rod 301 is located above the connecting rod 1 302. The other end of the suspension rod 301 is rotatably connected to the upper end of the rear bracket 21. The other end of the connecting rod 1 302 is rotatably connected to the connecting rod 2 303. The other end of the connecting rod 2 303 is rotatably connected to the lower end of the rear bracket 21. A torsion spring 32 is sleeved on the rotating shaft of the connecting rod 1 302 and the connecting rod 2 303. The two torsion arms of the torsion spring 32 are respectively fixed on the connecting rod 1 302 and the connecting rod 2 303. Blocks 33 are fixedly mounted on both sides of the support frame 2. The side of the block 33 corresponding to the first folding mechanism has an oblique cutout for blocking the second connecting rod 303. The block 33 blocks the first folding mechanism, limiting the back frame 3 from folding upward to its maximum angle. This provides enhanced support for the back frame 3 after it is lifted. By providing the first folding mechanism on the back frame 3, the first folding mechanism facilitates folding of the back frame. A T-shaped bracket is formed between the front bracket 22 and the support frame 2. One end of the sitting frame 1 4 is pivotally connected to the top of the front bracket 22 via a support lug 1 41. The other end is pivotally connected to a connecting arm 6. The other end of the connecting arm 6 is pivotally connected to the sitting frame 2 5. The connecting arm 6 and the second leg 61 form a T-shaped structure. The sitting frame 1 4 and the sitting frame 2 5 are symmetrically connected to the ends of the connecting arm 6.By providing a connecting arm 6 between the first seat frame 4 and the second seat frame 5, the connecting arm 6 and the second support leg 61 are fixedly arranged to form a T-shaped whole, which facilitates better folding of the first seat frame 4 and the second seat frame 5 during the lifting and folding process. After folding, the second support leg 61 can be supported between the first seat frame 4 and the second seat frame 5, making the top surface of the folded seat frame 2 more flat and providing stable support. A second support ear 51 is fixedly attached to the other end of the second seat frame 5. A first support leg 52 is movably connected to the second support ear 51. A second support leg 61 is fixedly connected to the middle portion of the connecting arm 6. The two sides of the second support leg 61 are coaxially connected to the first folding arm 53 and the second folding arm 62. The other end of the second folding arm 62 is rotatably connected to the top of the front bracket 22. During the lifting and folding process, the first and second seat frames 4 and 5 can be automatically folded under the action of the first folding arm 53 and the second folding arm 62, eliminating the need for manual folding, facilitating conversion between different sofa beds. A circular disc 521 is provided at the top of the first support leg 52. The pivot points of the second support ear 51 and the first folding arm 53 are symmetrically connected to the two sides of the disc 521. The pivot points of the second support ear 51 and the first folding arm 53 are coaxially aligned with the center point of the disc 521. A second folding traction mechanism and a locking ear 7 are provided at the end of the seat frame 1 4 located at the front bracket 22, wherein the second folding traction mechanism includes a connecting rod 3 401, a connecting rod 402 and a tension spring 403. One end of the connecting rod 3 401 is rotatably connected to the end of the seat frame 1 4, and the other end is rotatably connected to the connecting rod 4 402. The middle part of the connecting rod 402 is rotatably connected to the support frame 2, and the other end of the connecting rod 4 402 is fixedly connected to the tension spring 403. The other end of the tension spring 403 is fixed to the bottom end of the front bracket 22. By providing the second folding traction mechanism at the end of the seat frame 1 4, the seat frame 1 4 and the seat frame 2 5 have a traction force during the folding process, which not only facilitates the folding between the seat frames, but also makes the folding easier. The locking lug 7 is L-shaped. After the seat frame 1 4 and the seat frame 2 5 are fully unfolded, the free end of the back frame 3 is placed on the locking lug 7 to lock the seat frame 1 4 and the seat frame 2 5. When the bed is formed, the locking lug 7 is provided at the end of the seat frame 1 4, so that the back frame 3 can be clamped in the locking lug 7, thereby locking the seat frame 1 4 and the seat frame 2 5. Without lifting the back frame 3, the seat frame 1 4 and the seat frame 2 5 cannot be lifted or folded. In this way, the lifting bed frame in the bed state can be made more stable, reliable, and easy to carry.The lifting bed frame of the present invention has a simple structure and is easy to operate, making the transition between sofa and bed configurations more stable and convenient. In the sofa configuration, the support between the seat frames is more stable, providing a flatter seat surface. In the bed configuration, the lifting bed frame is more stable, reliable, and easy to transport. Specifically, when converting from a bed to a sofa, the back frame 3 is first lifted, disengaging the back frame 3 from the locking lugs 7 and releasing the locks it holds on the first and second seat frames 4 and 5. Under the action of the blocking blocks 33, the back frame 3 is lifted to its maximum angle, providing support. The seat frames 1 and 2, 5, are then folded into the base 1 by lifting and folding. During the folding process, the first and second legs 52 and 61 fold automatically under the pull of the folding arms 53 and 62, completing the transition from bed to sofa. To convert the sofa into a bed, the first and second seat frames 4 and 5 are pulled out of the base 1. The back frame 3 is then folded and placed into the locking lugs 7. As the first and second seat frames 4 and 5 unfold, the first and second legs 52 and 61 automatically unfold under the guidance of the first and second folding arms 53 and 62, completing the sofa-to-bed transition. The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. While the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that they may modify the technical solutions described in the aforementioned embodiments or substitute equivalent features for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

Claims 1. A lifting bed frame, comprising a base (1), a back frame (3) being connected to the rear of the base (1) in a folding manner, and a first seat frame (4) and a second seat frame (5) being connected to the front of the base (1) in a lifting and folding manner, characterized in that: Support frames (2) are fixedly provided on both sides of the base (1), and a rear frame (21) and a front frame (22) are fixedly provided at both ends of the support frame (2); an L-shaped frame is formed between the rear frame (21) and the support frame (2), and the rear frame (21) is connected to the back frame (3) via a first folding traction mechanism; blocking blocks (33) are fixedly provided on both sides of the support frame (2), and the blocking blocks (33) are used to block the first folding mechanism, so as to limit the back frame (3) from folding upward to a maximum angle; a T-shaped frame is formed between the front frame (22) and the support frame (2); one end of the sitting frame (4) is rotatably connected to the top of the front frame (22) via a support ear (41), and the other end is rotatably connected to a connecting arm (6), and the other end of the connecting arm (6) is rotatably connected to the sitting frame (5); the other end of the sitting frame (5) is fixedly provided with a support ear (51); a support leg (52) is movably connected to the support ear (51), The middle of the connecting arm (6) is fixedly connected to the second leg (61), and the two sides of the second leg (61) are rotatably connected to the folding arm (53) and the second folding arm (62) in a coaxial manner, and the other end of the second folding arm (62) is rotatably connected to the top of the front bracket (22); the top of the first leg (52) is provided with a disc portion (521), and the pivot points of the second ear (51) and the folding arm (53) are rotatably connected to the two sides of the disc portion (521) in a symmetrical manner; the end of the first seat frame (4) located on the front bracket (22) is provided with a second folding traction mechanism and a locking ear (7), and the locking ear (7) is L-shaped. After the first seat frame (4) and the second seat frame (5) are fully unfolded, the free end of the back frame (3) is placed on the locking ear (7) to lock the first seat frame (4) and the second seat frame (5).

2. A lifting bed frame according to claim 1, characterized in that: The first folding traction mechanism comprises a suspension rod (301), a connecting rod 1 (302), a connecting rod 2 (303) and a support (31); the support (31) is fixedly arranged on the back frame (3); the suspension rod (301) and the connecting rod 1 (302) are rotatably connected to the support (31); the suspension rod (301) is located above the connecting rod 1 (302); the other end of the suspension rod (301) is rotatably connected to the upper end of the rear bracket (21); the other end of the connecting rod 1 (302) is rotatably connected to the connecting rod 2 (303); the other end of the connecting rod 2 (303) is rotatably connected to the lower end of the rear bracket (21); a torsion spring (32) is sleeved on the rotating shaft of the connecting rod 1 (302) and the connecting rod 2 (303); and two torsion arms of the torsion spring (32) are respectively fixed to the connecting rod 1 (302) and the connecting rod 2 (303).

3. A lifting bed frame according to claim 2, characterized in that: A side of the blocking block (33) corresponding to the first folding traction mechanism is provided with an oblique cutout for blocking the second connecting rod (303).

4. A lifting bed frame according to claim 1, characterized in that: The connecting arm (6) and the second supporting leg (61) form a T-shaped structure, and the first seat frame (4) and the second seat frame (5) are symmetrically rotatably connected to the two ends of the connecting arm (6). 6 5. The lifting bed frame according to claim 1, characterized in that: The pivot points of the second support ear (51) and the first folding arm (53) are on the same center line as the center point of the disc portion (521).

6. A lifting bed frame according to claim 1, characterized in that: The second folding traction mechanism comprises a connecting rod 3 (401), a connecting rod 4 (402) and a tension spring (403); one end of the connecting rod 3 (401) is rotatably connected to the end of the seat frame 1 (4); the other end is rotatably connected to the connecting rod 4 (402); the middle part of the connecting rod 4 (402) is rotatably connected to the support frame (2), the other end of the connecting rod four (402) is fixedly connected to the tension spring (403), and the other end of the tension spring (403) is fixed to the bottom end of the front bracket (22).

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