Simple sofa bed

Abstract

The utility model discloses a simple sofa bed relates to sofa bed technical field, including base, head frame, middle frame and seat frame, the head frame is rotatingly connected on the middle frame through folding rotary seat, the both sides of seat frame are rotatingly connected with support leg, the both sides rear end of base is rotatingly connected with the rear support arm, the both sides front end of base is rotatingly connected with the front support arm, the front support arm is rotatingly connected with the back support arm. A connecting rod is rotationally connected between the rear supporting arm and the front supporting arm; a folding rotating arm is arranged between two sides of the middle frame and the seat frame; a first traction rod is vertically fixed to the middle of the folding rotating arm, a second traction rod is rotationally connected between the top of the first traction rod and the top end of the front supporting arm, and the lower end of the first traction rod is rotationally connected with a seat frame folding arm and a supporting leg folding arm which are used for synchronously folding the seat frame and the supporting legs. The folding supporting structure is simplified, on one hand, the production and assembly difficulty can be reduced, meanwhile, the damage probability of the sofa bed in the using process can be reduced, and the durability of the sofa bed is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sofa beds, and particularly relates to a simple sofa bed. Background Art

[0002] During the folding process of the existing sofa beds, generally multiple steps of folding are required to first switch between the sofa and the bed, and the folding support structures on both sides of the sofa bed are relatively complex. On the one hand, it increases the production difficulty, and on the other hand, for the support joints with multiple structures, the probability of damage during use will also increase. For this reason, we have designed and proposed a simple sofa bed. Content of the Utility Model

[0003] The purpose of the utility model is to solve the shortcoming of the relatively complex folding support structure in the existing technology, and propose a simple sofa bed. The folding support structure of this simple sofa bed is simple, easy to produce and assemble, and at the same time, its durability can also be improved.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] Design a simple sofa bed, including a base, a head frame, a middle frame and a sitting frame. The head frame is rotatably connected to the middle frame through a folding rotating seat. Legs are rotatably connected to both sides of the sitting frame. Rear support arms for supporting the head frame are rotatably connected to the rear ends of both sides of the base, and the rear support arms are in an L-shaped structure; front support arms for supporting the middle frame are rotatably connected to the front ends of both sides of the base, and the front support arms are in a Z-shaped structure; a connecting rod is rotatably connected between the inflection point of the rear support arm and the lower inflection point of the front support arm; folding rotating arms are provided between both sides of the middle frame and the sitting frame, and the middle frame and the sitting frame are respectively rotatably connected to both ends of the folding rotating arm; a first traction rod is vertically fixed in the middle of the folding rotating arm, a second traction rod is rotatably connected between the top of the first traction rod and the top end of the front support arm, and a sitting frame folding arm and a leg folding arm for synchronously folding the sitting frame and the legs are rotatably connected to the lower end of the first traction rod in a coaxial manner.

[0006] Further, a hinge is provided on one side of the leg away from the connection point of the leg folding arm. One end of the hinge is rotatably connected to the leg, and the other end is rotatably connected to the sitting frame.

[0007] Further, an arc connection part is fixedly provided on the head frame, and the end of the rear support arm is rotatably connected to the middle of the arc connection part.

[0008] Further, a fixed arm is fixedly provided at one end of the front support arm located on the base, and a tension spring is connected between the fixed arm and the bottom of the base.

[0009] Compared with the prior art, a simple sofa bed proposed by the present utility model has the beneficial effects that: the middle legs of the existing folding bed are cancelled in the present utility model, simplifying the folding support structure. On the one hand, it can reduce the difficulty of production and assembly, and at the same time, it can also reduce the probability of damage to the sofa bed during use, improving its durability. Description of the Drawings

[0010] The drawings are used to provide further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] The labels in the figure are: 1, base; 11, rear support arm; 12, front support arm; 121, fixed arm; 13, connecting rod; 14, tension spring; 2, head frame; 21, arc connecting part; 3, middle frame; 4, seat frame; 41, leg; 42, hinge; 5, folding rotating arm; 51, seat frame folding arm; 52, leg folding arm; 53, first traction rod; 54, second traction rod; 6, folding rotating seat. Detailed Embodiments

[0013] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0014] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0015] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, terms such as "installation", "provided with", "sheathed / connected", "connection", etc. shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0016] Now, in combination with the accompanying drawings of the specification, the structural features of the present utility model will be described in detail.

[0017] See Figure 1 , a simple sofa bed, including a base 1, a head frame 2, a middle frame 3 and a seat frame 4. The head frame 2 is rotatably connected to the middle frame 3 through a folding and rotating seat 6. The folding and rotating seat 6 plays a role of rotational connection between the head frame 2 and the middle frame 3, and on the other hand, plays a role of expansion limit. When the middle frame 3 and the head frame 2 are unfolded into a horizontal state, the rotation between the middle frame 3 and the head frame 2 reaches the maximum expansion angle and cannot be folded upward continuously. Both sides of the seat frame 4 are rotatably connected with legs 41. In order to enhance the connection strength of the legs 41, a hinge 42 is provided on the side of the leg 41 away from the connection point of the leg folding arm 52. One end of the hinge 42 is rotatably connected to the leg 41, and the other end is rotatably connected to the seat frame 4. The rear ends on both sides of the base 1 are rotatably connected with rear support arms 11 for supporting the head frame 2. The rear support arms 11 are in an L-shaped structure. One end of the rear support arm 11 is rotatably connected to the base 1, and the other end is rotatably connected to the side of the head frame 2. In order to improve the connection stability with the head frame 2, an arc connection part 21 is fixedly provided on the head frame 2, and the end of the rear support arm 11 is rotatably connected to the middle of the arc connection part 21. The front ends on both sides of the base 1 are rotatably connected with front support arms 12 for supporting the middle frame 3. The front support arms 12 are in a Z-shaped structure. One end of the front support arm 12 is rotatably connected to the base 1, and the upper inflection point of the front support arm 12 is rotatably connected to the side of the middle frame 3. A connecting rod 13 is rotatably connected between the inflection point of the rear support arm 11 and the lower inflection point of the front support arm 12. Under the action of the connecting rod 13, the rear support arm 11 and the front support arm 12 can be rotated and folded synchronously in one direction. In order to make the folding of the rear support arm 11 and the front support arm 12 smoother, a fixed arm 121 is fixedly provided at one end of the front support arm 12 located on the base 1, and a tension spring 14 is connected between the fixed arm 121 and the bottom of the base 1. Under the action of the tension spring 14, the middle frame 3 and the seat frame 4 are more easily folded.

[0018] A folding and rotating arm 5 is provided between the two sides of the middle frame 3 and the seat frame 4. The middle frame 3 and the seat frame 4 are respectively rotatably connected to the two ends of the folding and rotating arm 5. A first traction rod 53 is vertically fixed in the middle of the folding and rotating arm 5. A second traction rod 54 is rotatably connected between the top of the first traction rod 53 and the top end of the front support arm 12. The lower end of the first traction rod 53 is rotatably connected in a coaxial manner with a seat frame folding arm 51 and a leg folding arm 52 for synchronously folding the seat frame 4 and the legs 41. Among them, the lower end of the first traction rod 53 is rotatably connected with the seat frame folding arm 51 and the leg folding arm 52. The other end of the seat frame folding arm 51 is rotatably connected to the side of the middle frame 3, and the other end of the leg folding arm 52 is rotatably connected to the leg 41.

[0019] The middle legs of the existing folding bed of the simple sofa bed of the present utility model are cancelled, and the folding support structure is simplified. On the one hand, the difficulty of production and assembly can be reduced. On the other hand, during the use process, the damage probability of the sofa bed during use can also be reduced, and its durability can be improved.

[0020] Specifically, during use, by slightly lifting the seat frame 4 upward and pushing the seat frame 4 forward, the front support arm 12 is folded and retracted into the base 1. At this time, while the rear support arm 11 drives the head frame 2 to move backward, the middle frame 3 is translated and stacked in the base 1 under the guidance of the front support arm 12. At this time, the head frame 2 is in an inclined state under the guidance of the rear support arm 11 to form the backrest of the sofa. During this process, the seat frame 4 is folded above the middle frame 3 under the action of the first traction rod 53, the second traction rod 54 and the seat frame folding arm 51. During the folding process of the middle frame 3, the legs 41 are folded into the base 1 under the action of the leg folding arm 52, so as to realize the transformation from a bed to a sofa. Unfolding in the opposite direction and pulling the seat frame 4 can complete the transformation from a sofa to a bed.

[0021] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A simple sofa bed, comprising a base (1), a head frame (2), a middle frame (3) and a seat frame (4), wherein the head frame (2) is rotatably connected to the middle frame (3) via a folding rotating seat (6), and legs (41) are rotatably connected to both sides of the seat frame (4), characterized in that: The rear ends of both sides of the base (1) are rotatably connected to rear support arms (11) for supporting the head frame (2), and the rear support arms (11) are in an L-shaped structure; Front ends of both sides of the base (1) are rotatably connected to front support arms (12) for supporting the middle frame (3), and the front support arms (12) are in a Z-shaped structure; A connecting rod (13) is rotatably connected between the inflection point of the rear supporting arm (11) and the lower inflection point of the front supporting arm (12); A folding rotating arm (5) is provided between the two sides of the middle frame (3) and the seat frame (4), and the middle frame (3) and the seat frame (4) are rotatably connected to the two ends of the folding rotating arm (5) respectively; A first traction rod (53) is vertically fixed in the middle of the folding rotating arm (5); a second traction rod (54) is rotatably connected between the top of the first traction rod (53) and the top of the front supporting arm (12); and a seat frame folding arm (51) and a leg folding arm (52) for synchronously folding the seat frame (4) and the legs (41) are rotatably connected at the lower end of the first traction rod (53) in a coaxial manner.

2. A simple sofa bed according to claim 1, characterized in that: A hinge (42) is provided on one side of the supporting leg (41) away from the connection point of the supporting leg folding arm (52); one end of the hinge (42) is rotatably connected to the supporting leg (41), and the other end is rotatably connected to the seat frame (4).

3. The simple sofa bed according to claim 1, characterized in that: A circular arc connection portion (21) is fixedly provided on the head frame (2), and the end of the rear support arm (11) is rotatably connected to the middle of the circular arc connection portion (21).

4. The simple sofa bed according to claim 1, characterized in that: The front support arm (12) is located at one end of the base (1) and is fixedly provided with a fixed arm (121), and a tension spring (14) is connected between the fixed arm (121) and the bottom of the base (1).

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