Hinge, and folding sofa structure comprising same

Abstract

A hinge, and a folding sofa structure comprising same, which relate to the technical field of sofa structures. The structure of the hinge comprises a vertical intermediate plate (1), connecting side plates (2), and a folding rotating bar (3). The hinge is folded by lifting the vertical intermediate plate (1) upwards, such that the inevitable downward pressure applied to the hinge during daily use will not accidentally trigger the folding operation. The folding sofa structure comprising a hinge comprises two sofa armrest vertical plates (a), which are respectively arranged on the two connecting side plates (2), such that when the foldable armrest structure is unfolded for use, the armrest is stable and thick enough to ensure sufficient comfort during use.

Description

Hinge and folding sofa structure comprising the same TECHNICAL FIELD

[0001] The present application belongs to the technical field of sofa structure, and particularly relates to a hinge and a folding sofa structure comprising the same. BACKGROUND

[0002] The common sofa mainly comprises an armrest, a seat plate and a backrest. In order to reduce the transportation cost of the sofa, the armrest, the seat plate and the backrest are generally connected movably, and the connection modes include screwing and inserting.

[0003] In addition, if the sofa product needs to be shipped by sea, the transportation cost should be further reduced. For example, for a single armrest and a single seat plate, the structure needs to be further optimized so that it can be further disassembled or folded, thereby reducing the overall packaging volume of the sofa product. The hinge can be used to achieve the folding effect of the armrest in the sofa structure.

[0004] Of course, for the structure such as the folding armrest and the disassembled seat plate, or for the hinge itself, it is necessary to ensure sufficient stability and connection stability of the hinge itself, and the basic support function of the sofa structure such as the armrest and the seat plate should not be affected.

[0005] For example, a Chinese invention patent with the publication number CN220512539U and the publication date of February 23, 2024 discloses a foldable sofa armrest and a sofa. The sofa armrest comprises an armrest frame and an armrest skin. The armrest frame comprises a first frame, a second frame and a folding part. The folding part comprises a first folding piece, a second folding piece and a connecting assembly. The first folding piece is arranged on the first frame, and the second folding piece is arranged on the second frame. The armrest frame has a first state and a second state. In the first state, the connecting assembly tightly connects the first folding piece and the second folding piece. In the second state, the first folding piece and the second folding piece can rotate relative to each other.

[0006] The structure principle and advantages of the foldable sofa armrest in the invention patent are as follows: the connecting assembly enables the sofa armrest to be in an unfolded state and a folded state. In the folded state, the sofa armrest occupies a small space, which is beneficial for transportation and storage and reduces the cost of transportation and storage.

[0007] However, the folding part has at least the following deficiency in actual use, which is also the technical problem to be solved by the present application:

[0008] When the folding part is accidentally pressed down, the folding action is easily triggered, which finally causes the sofa armrest to be accidentally folded when it is used normally, and accidents such as hand clamping occur. Please refer to Figure 5 for details.

[0009] Therefore, it is urgent to provide a new folding structure with reasonable folding mode and not easy to be accidentally folded, i.e. the hinge, for use in the armrest structure of a sofa. SUMMARY

[0010] The hinge provided by the present application comprises a vertical intermediate plate, connecting side plates, and folding rotating bars, so that the folding method of the hinge is to lift the vertical intermediate plate upward, and thus the inevitable downward pressure applied to the hinge during daily use will not accidentally trigger the folding operation.

[0011] In addition, the present application also provides a folding sofa structure comprising the hinge, which comprises two sofa armrest upright plates arranged on the two connecting side plates respectively, so that the folding armrest structure has sufficient armrest stability and thickness when in use, thereby ensuring sufficient use comfort.

[0012] The hinge provided by the present application comprises a vertical intermediate plate, connecting side plates, and folding rotating bars, so that the folding method of the hinge is to lift the vertical intermediate plate upward, and thus the inevitable downward pressure applied to the hinge during daily use will not accidentally trigger the folding operation.

[0013] Further preferred technical solutions are that the number of the connecting side plates is two, which are arranged at the two sides of the vertical intermediate plate respectively; and the number of the folding rotating bars is four, which are arranged on the two connecting side plates respectively.

[0014] Further preferred technical solutions are that two upper protruding blocks for mutual blocking and limiting are arranged on the proximal ends of the two folding rotating bars respectively.

[0015] Further preferred technical solutions are that two lower teeth for mutual meshing are arranged on the proximal ends of the two folding rotating bars respectively.

[0016] Further preferred technical solutions are that at least one of the folding rotating bars comprises a bending section; and a folding end point indicating groove for clamping the bending section is arranged on the side edge of the vertical intermediate plate.

[0017] Further preferred technical solutions are that an outer hinge shaft is arranged on the folding rotating bar and the connecting side plate.

[0018] Further preferred technical solutions are that a folding end point indicating opening for clamping the outer hinge shaft is arranged on the side edge of the vertical intermediate plate.

[0019] The folding sofa structure comprising the hinge comprises two sofa armrest risers respectively arranged on the two connecting side plates.

[0020] The further preferred technical scheme is that the hinge further comprises a horizontal plate arranged between the two sofa armrest risers and used for blocking and limiting the two sofa armrest risers which have been folded and contracted.

[0021] The further preferred technical scheme is that the number of the hinges is two, and the two vertical intermediate plates are respectively arranged at the two end positions of the horizontal plate. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a structural schematic view of the hinge in the present application.

[0023] Fig. 2 is a structural schematic view of a first folding rotating strip in the present application.

[0024] Fig. 3 is a structural schematic view of a second folding rotating strip in the present application.

[0025] Fig. 4 is a schematic view of the position and shape of a folding end point indicating slot and a folding end point indicating opening in the present application.

[0026] Fig. 5 is a schematic view of the folding and contracting state of a connecting side plate in the present application.

[0027] Fig. 6 is a structural schematic view of a folding armrest in the present application.

[0028] Fig. 7 is a schematic view of a structure of a horizontal plate in the present application.

[0029] In the figures, the meanings of the respective marks are as follows:

[0030] vertical intermediate plate 1, connecting side plate 2, folding rotating strip 3, bending section 3-1, initial section 3-2, final section 3-3, upper protruding block 4, lower tooth 5, folding end point indicating slot 6, outer hinge shaft 7, folding end point indicating opening 8, inner hinge shaft 9;

[0031] sofa armrest riser a, horizontal plate b. DETAILED DESCRIPTION

[0032] The following description is merely preferred embodiments of the present application, and is not intended to limit the scope of the present application.

[0033] As shown in Figs. 1-7, a hinge comprises a vertical intermediate plate 1, a connecting side plate 2, and a folding rotating strip 3 which is hingedly connected to the vertical intermediate plate 1 and the connecting side plate 2 at two ends and is used for folding the vertical intermediate plate 1 and the connecting side plate 2 in an upward lifting manner.

[0034] In the embodiment, the length direction of the connecting side plate 2 is also always vertical, and the length direction of the folding rotating strip 3 is horizontal when the hinge is fully unfolded.

[0035] When the length direction of the folding rotating strip 3 is vertical or inclined, that is, the folding state of the connecting side plate 2, the storage and transportation state of the folding sofa structure is ensured, and the folding sofa structure has a small packaging volume.

[0036] In the process of rotating the folding rotating strip 3 from the horizontal state to the vertical or inclined state, there is only one rotating direction, that is, the connecting side plate 2 is downward compared to the vertical intermediate plate 1, corresponding to the above lifting action of the vertical intermediate plate 1.

[0037] Therefore, during daily use, the downward pressure on the vertical intermediate plate 1 will not cause it to be accidentally folded and collected, but can further unfold the hinge and hold the unfolded use state of the folding sofa structure.

[0038] In addition, the materials of the vertical intermediate plate 1, the connecting side plate 2 and the folding rotating strip 3 are high-strength steel.

[0039] The number of the connecting side plate 2 is 2, which is arranged at the position of the two sides of the vertical intermediate plate 1; the number of the folding rotating strip 3 is 4, which is arranged on the two connecting side plates 2 respectively.

[0040] In the embodiment, the vertical intermediate plate 1, one of the connecting side plates 2 and the upper and lower folding rotating strips 3 on the connecting side plate 2 jointly form a parallelogram structure, and the hinge can realize the rotating folding and rotating unfolding effect by using the instability of the parallelogram.

[0041] Correspondingly, there are 8 hinge points on the hinge, and the 8 hinge points are arranged in an upper row of 4 and a lower row of 4 when the folding rotating strip 3 is unfolded to the horizontal direction, which can be referred to in FIG. 1.

[0042] The proximal end of the two folding rotating strips 3 is also provided with two upper protruding blocks 4 for mutual blocking and limiting.

[0043] In the embodiment, the two upper protruding blocks 4 are in contact with each other, which is the end point of the rotating unfolding action of the folding rotating strip 3, and the folding rotating strip 3 is in a horizontal state at this time, and the folding sofa structure is in a normal use state.

[0044] Two of the folding rotating bars 3 are provided with two sections of lower teeth 5 on the close end, which are used for mutual engagement.

[0045] In this embodiment, two pairs of the folding rotating bars 3 are provided with two groups of the lower teeth 5, which are always engaged during the whole rotating process, so as to ensure the synchronous rotating unfolding and folding of the two connecting side plates 2.

[0046] The number of the teeth of one section of the lower teeth 5 is 3-10, which is located below the upper protruding block 4, and the two sections of the lower teeth 5 are always engaged, so that the rotating unfolding and rotating folding of the hinge part has a certain damping, which avoids the rapid unfolding and folding of the folding sofa structure, thereby improving the safety of the hinge part.

[0047] At least one of the folding rotating bars 3 comprises a bending section 3-1, and the side edge of the vertical intermediate plate 1 is further provided with a folding end indicating slot 6 for clamping the bending section 3-1.

[0048] In this embodiment, the unfolding end of the hinge part is indicated by the upper protruding block 4, and the folding end of the hinge part can be indicated by the folding end indicating slot 6 and the bending section 3-1, which can be specifically referred to FIG. 4.

[0049] At this time, the middle section of the folding rotating bar 3, i.e., the bending section 3-1, which is generally in the shape of “Z”, is clamped into the folding end indicating slot 6, and cannot rotate any more, which is the folding end of the hinge part. At this time, the connecting side plate 2 is close to the vertical intermediate plate 1, which ensures that the folding sofa structure has a small and appropriate folding size.

[0050] Specifically, among the four folding rotating bars 3, two of the folding rotating bars 3 are relatively simple in structure and in the shape of “straight plate”, and the structures of the other two are the combination of the bending section 3-1, the initial section 3-2 and the final section 3-3, and the two folding rotating bars 3 in the shape of “Z” are arranged on the same connecting side plate 2.

[0051] On the other hand, the number of the folding end indicating slots 6 can be one or two, i.e., the lower position of the inner hinge shaft 9 can also be provided with another folding end indicating slot 6, which is slightly different from FIG. 5 but has the same principle.

[0052] The folding rotating bar 3 and the connecting side plate 2 are further provided with an outer hinge shaft 7.

[0053] In the embodiment, the outer hinge shaft 7 and the inner hinge shaft 9 are both provided with end position limiting structures, which prevent the insertion objects from being separated from each other after the insertion is completed, i.e. the vertical intermediate plate 1 and the folding rotating strip 3, and the connecting side plate 2 and the folding rotating strip 3 can only rotate relative to each other, and cannot be separated from each other.

[0054] The side edge of the vertical intermediate plate 1 is further provided with a folding end position indicating hole 8 for clamping the outer hinge shaft 7.

[0055] In the embodiment, the folding end position indicating hole 8 has the same function as the folding end position indicating groove 6, which is used to limit the continuous rotation of the folding rotating strip 3. When the outer hinge shaft 7 is clamped into the folding end position indicating hole 8, the distance between the two connecting side plates 2 is the preset and actually required folding size of the hinge.

[0056] Of course, at this time, it is not necessarily the maximum folding range of the hinge, and the folding effect also needs to consider other use restrictions of the folding sofa structure. In other words, the transverse excavation depth of the folding end position indicating hole 8 and the folding end position indicating groove 6 can be relatively small, for example, 10%-30% of the transverse size of the vertical intermediate plate 1.

[0057] Among them, the lower position of the two groups of inner hinge shafts 9 can be provided with the folding end position indicating hole 8 and / or the folding end position indicating groove 6. The folding end position indicating hole 8 and the folding end position indicating groove 6 have a similar height and position, and the folding end position indicating groove 6 is higher than the folding end position indicating hole 8.

[0058] Finally, the shape of the folding end position indicating hole 8 and the folding end position indicating groove 6 is not specifically required, for example, it can be rectangular, semicircular, triangular, etc.

[0059] A folding sofa structure comprising the hinge includes two sofa armrest upright plates a arranged on the two connecting side plates 2 respectively.

[0060] In the embodiment, the two sofa armrest upright plates a are always parallel to each other, and the distance between them is the largest, which corresponds to the normal use state of the folding armrest and the fully unfolded state of the hinge.

[0061] At this time, the folding rotating strip 3 is in a horizontal state, the sofa armrest upright plate a has the largest supporting upper surface, thereby providing a sufficient armrest arm placement effect.

[0062] When the user's arm accidentally presses down the vertical intermediate plate 1, only the upper protruding block 4 will be further pressed, and the hinge will not be accidentally folded, which is very safe and practical. Correspondingly, the upper protruding block 4 and even the entire hinge are required to have sufficient structural rigidity and hardness.

[0063] Further comprising a horizontal plate b arranged between the two sofa armrest upright plates a and used for blocking the two sofa armrest upright plates a which have been folded and retracted.

[0064] In the embodiment, the horizontal plate b is horizontal and parallel to the sofa armrest upright plates a, and the first function of the horizontal plate b is to serve as the end point of the folding and retracting action of the two sofa armrest upright plates a.

[0065] At this time, the width of the horizontal plate b is relatively large, and the above-mentioned blocking effect can be a supplement and replacement of the folding end point indicating effect of the folding end point indicating slot 6 and the folding end point indicating opening 8, and the specific implementation is as follows:

[0066] First, when the inner side surface of the sofa armrest upright plate a abuts against the side surface of the horizontal plate b, and the bent section 3-1 is clamped into the folding end point indicating slot 6 and the outer side hinge shaft 7 is clamped into the folding end point indicating opening 8, the above-mentioned blocking effect is “supplement”, so that the folding state of the armrest is more stable.

[0067] Second, when the inner side surface of the sofa armrest upright plate a abuts against the side surface of the horizontal plate b, the above-mentioned blocking effect is “replacement”, at which time the folding armrest can temporarily need a larger folding and retracting width, and if the horizontal plate b is further matched with the adjustable width function of the horizontal plate b, the folding end point indicating function of the folding end point indicating slot 6 and the folding end point indicating opening 8 can be reactivated.

[0068] The number of the hinge members is two, and the two vertical intermediate plates 1 are respectively arranged at the two end positions of the horizontal plate b.

[0069] In the embodiment, the second function of the horizontal plate b is to connect the two hinge members as a whole, so as to further improve the structural strength of the entire folding armrest, and the second function is independent of the first function and is irrelevant to the width size of the horizontal plate b.

[0070] Finally, one or two horizontal plates b can be arranged between the two sofa armrest upright plates a, that is, one above the other, which corresponds to two or four hinge members, so as to ensure the installation position of the horizontal plate b and the hinge member without affecting other functions of the sofa armrest.

[0071] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. These are modifications without creativity, and are protected by the patent law within the scope of the claims of the present application.

Claims

1. A hinge member, characterized by: The structure comprises a vertical middle plate (1), a connecting side plate (2), and two end folding rotating bars (3) respectively hinged to the vertical middle plate (1) and the connecting side plate (2) and upwardly lifted by the vertical middle plate (1) for folding.

2. A hinge according to claim 1, characterised in that: The number of the connecting side plates (2) is two, which are respectively arranged at both sides of the vertical middle plate (1); the number of the folding rotating bars (3) is four, which are respectively arranged on the two connecting side plates (2).

3. A hinge according to claim 2, wherein: Two upper convex blocks (4) for mutual blocking are respectively arranged on the approaching ends of the two folding rotating bars (3).

4. A hinge according to claim 2, wherein: Two lower teeth (5) for mutual engagement are respectively arranged on the approaching ends of the two folding rotating bars (3).

5. A hinge according to claim 2, wherein: At least one of the folding rotating bars (3) comprises a bending section (3-1); a folding end point indicating slot (6) for clamping the bending section (3-1) is further arranged on the side edge of the vertical middle plate (1).

6. A hinge according to claim 2, wherein: An outer hinge shaft (7) is further arranged on the folding rotating bar (3) and the connecting side plate (2).

7. A hinge according to claim 6, characterised in that: A folding end point indicating hole (8) for clamping the outer hinge shaft (7) is further arranged on the side edge of the vertical middle plate (1).

8. A folding sofa structure comprising the hinge according to claim 2, characterized in that: Two sofa armrest vertical plates (a) are respectively arranged on the two connecting side plates (2).

9. A folding sofa structure comprising hinges according to claim 8, characterized in that: A horizontal plate (b) is arranged between the two sofa armrest vertical plates (a) and used for blocking and limiting the two sofa armrest vertical plates (a) which have been folded and collected.

10. A folding sofa structure comprising hinges according to claim 9, characterized in that: The number of the hinge members is two, and the two vertical middle plates (1) are respectively arranged at both ends of the horizontal plate (b).

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