Four-bar linkage translation hinge and translation sofa thereof

Abstract

The utility model discloses a four-connecting-rod translation hinge, which relates to the field of sofas and comprises a lower fixed rod, an upper movable rod, a front rotating support arm and a rear rotating support arm, the front rotating support arm and the rear rotating support arm are of boomerang structures, and inflection points are arranged back to back. The two ends of the front rotating supporting arm and the two ends of the rear rotating supporting arm are rotationally connected between the lower fixing rod and the upper movable rod to form a four-connecting-rod translation hinge, and the upper movable rod moves in parallel under rotating supporting of the front rotating supporting arm and the rear rotating supporting arm. The utility model further provides a translation sofa which utilizes the four-bar linkage translation hinge. According to the utility model, the four-connecting-rod translation hinge is adopted, so that the movable seat frame of the sofa can be folded or unfolded in a push-pull translation manner, the folding or unfolding amplitude of the movable seat frame can be effectively reduced, and the folding or unfolding operation of the movable seat frame is light and easy to implement.

Description

Technical Field

[0001] The utility model belongs to the technical field of sofas, and particularly relates to a four-link translation hinge and a translation sofa thereof. Background Technique

[0002] The existing movable seat frame of a sofa generally uses a shaft as the center and adopts a flipping and folding method to realize the folding of the seat frame. With this flipping and folding method, when the movable seat frame is unfolded or folded, the movable seat frame needs to rotate 180 degrees around the shaft, and the folding and flipping amplitude is large, resulting in a large moment between the free end of the movable seat frame and the shaft. In addition, with this folding method, both sides of the seat frame folding need to maintain a planar structure to ensure the flatness of the seating surface after folding or unfolding. The double-sidedness of the movable seat frame usually leads to problems such as more material consumption and heaviness of the movable seat frame. The above factors will all cause inconvenience in the unfolding or folding operation of the movable seat frame, and it is more laborious during folding and unfolding. For this reason, we have designed and proposed a four-link translation hinge and a translation sofa for unfolding or folding the movable seat frame. Content of the Utility Model

[0003] The purpose of the utility model is to solve the disadvantages of inconvenient operation and being more laborious during folding or unfolding of the existing sofa movable seat frame connected by a shaft, and to propose a four-link translation hinge and a translation sofa thereof. The four-link translation hinge and the translation sofa can effectively reduce the amplitude of folding or unfolding of the movable seat frame, and at the same time make the operation of folding or unfolding the movable seat frame light and easy.

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

[0005] Design a four-link translation hinge, including a lower fixed rod, an upper movable rod, a front rotating arm and a rear rotating arm. The front rotating arm and the rear rotating arm are in a boomerang structure, with the inflection points facing away from each other. The two ends of the front rotating arm and the rear rotating arm are rotatably connected between the lower fixed rod and the upper movable rod, and form a four-link translation hinge. The upper movable rod moves parallel under the rotational support of the front rotating arm and the rear rotating arm.

[0006] Further, the lower fixed rod is provided with support bosses at positions corresponding to the rotation points of the front rotating arm and the rear rotating arm.

[0007] Further, the outer side of the bottom of the upper movable rod is provided with lugs for rotatably connecting the front rotating arm and the rear rotating arm, and a limit fixing seat is provided upward at one end of the rear rotating arm.

[0008] Further, a tension spring is connected between the front rotating arm and the rear rotating arm.

[0009] To solve the above technical problems, the present utility model further provides a translation sofa, which utilizes the described four-bar translation hinge and includes a fixed seat frame and a movable seat frame. The fixed seat frame is located on the sofa, the lower fixed rod is fixed on both sides of the sofa, the upper movable rod is fixed on both sides of the movable seat frame, and both ends of the front rotating arm and the rear rotating arm are rotatably connected between the lower fixed rod and the upper movable rod to form a four-bar translation hinge.

[0010] The beneficial effect of the four-bar translation hinge provided by the present utility model is that by adopting the four-bar translation hinge, the movable seat frame of the sofa can be folded or unfolded in a push-pull translation manner, which can effectively reduce the amplitude of folding or unfolding of the movable seat frame, and at the same time make the operation of folding or unfolding the movable seat frame easy and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0012] Figure 1 is a three-dimensional structural schematic diagram of the present utility model regarding the four-bar translation hinge;

[0013] Figure 2 is a schematic diagram of the translation sofa after being folded according to the present utility model;

[0014] Figure 3 is a schematic diagram of the translation sofa during the folding process according to the present utility model;

[0015] Figure 4 is a schematic diagram of the translation sofa after being unfolded according to the present utility model;

[0016] The labels in the figure are: 1, lower fixed rod; 11, support boss; 2, upper movable rod; 21, ear; 22, limit fixing seat; 3, front rotating arm; 4, rear rotating arm; 5, tension spring; 6, fixed seat frame; 7, movable seat frame; 8, leg. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying 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 creative efforts shall fall within the protection scope of the present utility model.

[0018] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It 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 therefore should not be construed as a limitation to the present utility model.

[0019] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should 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 elements. 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.

[0020] Now, in combination with the accompanying drawings of the specification, the structural features of the present utility model will be described in detail.

[0021] See Figure 1 , a four-bar translation hinge, comprising a lower fixed rod 1, an upper movable rod 2, a front rotating arm 3 and a rear rotating arm 4. The front rotating arm 3 and the rear rotating arm 4 are in a boomerang structure with the inflection points facing away from each other. In order to prevent the upper movable rod 2 from interfering with the lower fixed rod 1 during the rotation and translation process, support bosses 11 are provided at the positions of the lower fixed rod 1 corresponding to the rotation points of the front rotating arm 3 and the rear rotating arm 4. The end parts of the front rotating arm 3 and the rear rotating arm 4 are respectively rotatably connected to the support bosses 11, so that the upper movable rod 2 and the lower fixed rod 1 will not coincide in the same plane during the rotation process. On the outer side of the bottom of the upper movable rod 2, there are ear plates 21 for rotatably connecting the front rotating arm 3 and the rear rotating arm 4. At one end of the rear rotating arm 4, there is a limit fixing seat 22 provided upward. The limit fixing seat 22 is used to limit and fix the movable seat frame 7. The two ends of the front rotating arm 3 and the rear rotating arm 4 are rotatably connected between the lower fixed rod 1 and the upper movable rod 2, and form a four-bar translation hinge. The upper movable rod 2 moves parallel under the rotational support of the front rotating arm 3 and the rear rotating arm 4. In order to enable the upper movable rod 2 to have a certain self-locking ability during the moving process when unfolding or folding, a tension spring 5 is connected between the front rotating arm 3 and the rear rotating arm 4.

[0022] See Figures 2 - 4, this embodiment also proposes a translational sofa. Using a four-bar translational hinge, it includes a fixed seat frame 6 and a movable seat frame 7. The fixed seat frame 6 is located on the sofa. The lower fixed rods 1 are fixed on both sides of the sofa, and the upper movable rods 2 are fixed on both sides of the movable seat frame 7. Both ends of the front rotating arm 3 and the rear rotating arm 4 are rotatably connected between the lower fixed rod 1 and the upper movable rod 2, and form a four-bar translational hinge.

[0023] For the translational sofa of the present utility model, adopting a four-bar translational hinge composed of a lower fixed rod 1, an upper movable rod 2, a front rotating arm 3 and a rear rotating arm 4, the movable seat frame 7 can be folded or unfolded in a push-pull translational manner, which can effectively reduce the amplitude of folding or unfolding of the movable seat frame, and at the same time make the operation of folding or unfolding the movable seat frame easy and feasible.

[0024] 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 on 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 four-link translation hinge, comprising a lower fixed rod (1), an upper movable rod (2), a front rotating arm (3) and a rear rotating arm (4), characterized in that: The front rotating arm (3) and the rear rotating arm (4) are in a boomerang structure, with their inflection points arranged back to back. The two ends of the front rotating arm (3) and the rear rotating arm (4) are rotatably connected between the lower fixed rod (1) and the upper movable rod (2), and form a four-link translation hinge. The upper movable rod (2) moves in parallel under the rotation support of the front rotating arm (3) and the rear rotating arm (4).

2. A four-link translation hinge according to claim 1, characterized in that: The lower fixed rod (1) is provided with a supporting boss (11) at a position corresponding to the rotation point of the front rotating arm (3) and the rear rotating arm (4).

3. The four-link translation hinge according to claim 1, characterized in that: A support ear (21) for rotatably connecting the front rotating support arm (3) and the rear rotating support arm (4) is provided on the outer side of the bottom of the upper movable rod (2), and a limit fixing seat (22) is provided upward at one end of the rear rotating support arm (4).

4. The four-link translation hinge according to claim 1, characterized in that: A tension spring (5) is connected between the front rotating arm (3) and the rear rotating arm (4).

5. A translation sofa, using a four-link translation hinge as claimed in any one of claims 1 to 4, characterized in that: The invention comprises a fixed seat frame (6) and a movable seat frame (7), wherein the fixed seat frame (6) is located on a sofa, the lower fixed rod (1) is fixed on both sides of the sofa, the upper movable rod (2) is fixed on both sides of the movable seat frame (7), and the two ends of the front rotating support arm (3) and the rear rotating support arm (4) are rotatably connected between the lower fixed rod (1) and the upper movable rod (2), thereby forming a four-link translation hinge.

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