Hinge piece and folding sofa structure comprising same

Abstract

The utility model belongs to the technical field of sofa structures, and particularly relates to a hinge piece and a folding sofa structure comprising the hinge piece. The utility model provides a hinge piece which structurally comprises a vertical middle plate, a connecting side plate and a rotating strip for folding, so that a folding method of the hinge piece is that the vertical middle plate is lifted upwards, and therefore, unavoidable downward pressure is applied to the hinge piece in the daily use process, and the folding operation cannot be accidentally triggered. Besides, the utility model further provides a folding sofa structure comprising the hinge piece, and the folding sofa structure comprises two sofa armrest vertical plates which are respectively arranged on the two connecting side plates, so that when the folding armrest structure is unfolded for use, the armrest stability is enough, the armrest thickness is enough, and the enough use comfort is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sofa structures, and particularly relates to a hinge and a folding sofa structure including the hinge. Background Art

[0002] Common existing sofas mainly include armrests, seat boards, and backrests in terms of their structural components. On the other hand, in order to reduce the transportation cost of sofas, the above-mentioned armrests, seat boards, and backrests are generally movably connected, and the connection methods include screw connection, plug connection, etc.

[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 board, structural optimization is also required to enable further disassembly or folding, ultimately reducing the overall packaging volume of the sofa product. The above-mentioned hinge can be used to achieve the folding effect of the sofa structure, such as the armrest.

[0004] Of course, for structures such as folding armrests and detachable seat boards, or for the hinge itself, it is also necessary to ensure sufficient self-stability and connection stability, and not affect the basic support function of the sofa structure such as the armrest and the seat board.

[0005] For example, the Chinese utility model patent with the authorization announcement number CN220512539U and the authorization announcement date of February 23, 2024, discloses a foldable sofa armrest and a sofa, including an armrest frame and an armrest skin. The armrest frame includes a first frame, a second frame, and a folding part. The folding part includes a first folding member, a second folding member, and a connecting component. The first folding member is arranged on the first frame, and the second folding member is arranged on the second frame; the armrest frame has a first state and a second state. In the first state, the connecting component tightly connects the first folding member and the second folding member; in the second state, the first folding member and the second folding member can rotate relative to each other.

[0006] The structural principle and advantages of the foldable sofa armrest in this utility model patent are generally as follows: the connecting component enables the sofa armrest to be in an unfolded state and a folded state; in the folded state, the space occupied by the sofa armrest is not large, which is beneficial to transportation and storage and reduces the costs of transportation and storage.

[0007] However, during the actual use of this folding part, there is at least the following deficiency, which is also the technical problem to be solved by this utility model, that is:

[0008] When the folding part is accidentally pressed down, it is easy to trigger the folding action, ultimately resulting in the accidental folding and retraction of the sofa armrest during normal use, and further causing accidents such as pinching hands. For details, please refer to its appendix Figure 5 .

[0009] Therefore, in summary, there is an urgent need for a new folding structure with a reasonable folding method and not prone to accidental folding and closing, that is, the above-mentioned hinge member, which is used in the armrest structure of the sofa. Content of the Utility Model

[0010] The utility model provides a hinge member, and its structural composition includes a vertical middle plate, connecting side plates, and a folding rotating bar, such that: the folding method of the hinge member is to lift the vertical middle plate upward, so the inevitable downward pressure applied to the hinge member during daily use will not accidentally trigger the folding operation.

[0011] In addition, the utility model also provides a folding sofa structure including the hinge member, which includes 2 sofa armrest vertical plates respectively arranged on two connecting side plates, such that: when the folding armrest structure is opened and used, the armrest has sufficient stability and sufficient thickness, ensuring sufficient use comfort.

[0012] The technical solution adopted by the utility model to solve the above problems is: a hinge member, the structure of which includes a vertical middle plate, connecting side plates, and a folding rotating bar whose two ends are respectively hinged to the vertical middle plate and the connecting side plates and is used for folding by lifting the vertical middle plate upward to be close to the vertical middle plate and the connecting side plates.

[0013] A further preferred technical solution lies in: the number of the connecting side plates is 2, which are respectively arranged on both sides of the vertical middle plate; the number of the folding rotating bars is 4, and two of them are respectively arranged on the 2 connecting side plates.

[0014] A further preferred technical solution lies in: on the proximal ends of the two folding rotating bars, there are also respectively provided 2 upper protruding blocks for mutually blocking and limiting.

[0015] A further preferred technical solution lies in: on the proximal ends of the two folding rotating bars, there are also respectively provided 2 lower teeth for mutually meshing.

[0016] A further preferred technical solution lies in: at least one of the folding rotating bars includes a bent section; on the side edge of the vertical middle plate, there is also provided a folding end indication groove for clamping the bent section.

[0017] A further preferred technical solution lies in: on the folding rotating bar and the connecting side plate, there is also provided an outer hinge shaft.

[0018] A further preferred technical solution lies in: on the side edge of the vertical middle plate, there is also provided a folding end indication opening for clamping the outer hinge shaft.

[0019] A folding sofa structure including the hinge member comprises two sofa armrest vertical plates respectively arranged on the two connecting side plates.

[0020] A further preferred technical solution is that: it further includes a cross plate arranged between the two sofa armrest vertical plates and used for blocking and limiting the two sofa armrest vertical plates that have been folded and retracted.

[0021] A further preferred technical solution is that: the number of the hinge members is two, and the two vertical intermediate plates are respectively arranged at both ends of the cross plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural view of the hinge member in the present invention.

[0023] Figure 2 It is a schematic structural view of the first folding rotating bar in the present invention.

[0024] Figure 3 It is a schematic structural view of the second folding rotating bar in the present invention.

[0025] Figure 4 It is a schematic view of the position and shape of the folding end indication groove and the folding end indication opening in the present invention.

[0026] Figure 5 It is a schematic view of the folded and retracted state of the connecting side plate in the present invention.

[0027] Figure 6 It is a schematic structural view of the folding armrest in the present invention.

[0028] Figure 7 It is a schematic structural view of a cross plate in the present invention.

[0029] In the figure, the meanings of the various marks are as follows:

[0030] Vertical intermediate plate 1, connecting side plate 2, folding rotating bar 3, bending section 3-1, initial section 3-2, end section 3-3, upper protruding block 4, lower tooth 5, folding end indication groove 6, outer hinge shaft 7, folding end indication opening 8, inner hinge shaft 9;

[0031] Sofa armrest vertical plate a, cross plate b. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following is only the preferred embodiment of the present invention, and does not limit the scope of the present invention.

[0033] As shown in the atta Figure 1-7As shown, a hinge member, the structure of which includes a vertical intermediate plate 1, connecting side plates 2, and a folding rotary bar 3 that is hinged to the vertical intermediate plate 1 and the connecting side plates 2 at both ends respectively, and is used to approach the vertical intermediate plate 1 and the connecting side plates 2 by lifting the vertical intermediate plate 1 upward.

[0034] In this embodiment, the length direction of the connecting side plate 2 is also and always vertical. When the hinge member is fully unfolded, the length direction of the folding rotary bar 3 is horizontal. At this time, it corresponds to the use state of the folding sofa structure.

[0035] When the length direction of the folding rotary bar 3 is vertical or inclined, it is the retracted state of the connecting side plate 2, corresponding to the storage and transportation states of the folding sofa structure, ensuring that the folding sofa structure has a smaller packaging volume.

[0036] Among them, during the process of the folding rotary bar 3 rotating from the horizontal state to the vertical or inclined state, there is only one rotation direction, that is, the connecting side plate 2 moves downward relative to the vertical intermediate plate 1, corresponding to the above-mentioned upward lifting action of the vertical intermediate plate 1.

[0037] Therefore, during the daily use of this hinge member, the downward pressure on the vertical intermediate plate 1 will not cause it to fold and retract accidentally. Instead, it can further unfold the hinge member 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 plates 2, and the folding rotary bar 3 are all high-strength steel.

[0039] The number of the connecting side plates 2 is 2, which are respectively arranged on both sides of the vertical intermediate plate 1; the number of the folding rotary bars 3 is 4, and two of them are respectively arranged on the 2 connecting side plates 2.

[0040] In this embodiment, the vertical intermediate plate 1, one of the connecting side plates 2, and the upper and lower 2 folding rotary bars 3 on this connecting side plate 2 together form a parallelogram structure. Utilizing the instability of the parallelogram, the hinge member can achieve the effects of rotary retraction and rotary unfolding.

[0041] Correspondingly, there are 8 hinge points on this hinge member. When the folding rotary bar 3 is unfolded to the horizontal, the above-mentioned 8 hinge points are respectively 4 in the upper row and 4 in the lower row. Specifically, reference can be made to the appendix Figure 1 .

[0042] On the proximal ends of the two folding rotary bars 3, there are also respectively provided 2 upper protruding blocks 4 for mutual blocking and limiting.

[0043] In this embodiment, the two upper protruding blocks 4 corresponding to each other abut against each other, which is the end point of the rotational unfolding action of the folding rotating bar 3. At this time, the folding rotating bar 3 is in a horizontal state, and the corresponding folding sofa structure is in a normal use state.

[0044] On the proximal ends of the two folding rotating bars 3, there are also respectively provided two lower teeth 5 for meshing with each other.

[0045] In this embodiment, during the entire rotation process of the two pairs of folding rotating bars 3, one on top and one below, the two sets of lower teeth 5 are always meshed, ensuring that the two connecting side plates 2 rotate and unfold and fold up synchronously.

[0046] Among them, the number of teeth of one section of the lower teeth 5 is 3 - 10, and its position is below the upper protruding block 4. The two sections of the lower teeth 5 in a pair are always meshed, which also gives a certain damping to the rotational unfolding and rotational folding actions of this hinge, preventing the folding sofa structure connected thereto from unfolding and folding up quickly, thereby improving the use safety of this hinge.

[0047] At least one of the folding rotating bars 3 includes a bent section 3 - 1; on the side of the vertical intermediate plate 1, there is also provided a folding end point indicating groove 6 for clamping the bent section 3 - 1.

[0048] In this embodiment, the end point of the unfolding action of this hinge is indicated by the upper protruding block 4, while the end point of its folding and folding-up action can be indicated by the folding end point indicating groove 6 and the bent section 3 - 1. Specifically, reference can be made to the appendix Figure 4 .

[0049] At this time, the middle section of the folding rotating bar 3, which is generally in a "Z" shape, that is, the bent section 3 - 1, is snapped into the folding end point indicating groove 6 and cannot rotate further, which is the end point of the folding and folding-up action of this hinge. At this time, the connecting side plate 2 is fully close to the vertical intermediate plate 1, ensuring that the folding sofa structure has a sufficiently small and appropriate folding size.

[0050] Specifically, among the four folding rotating bars 3, two of the folding rotating bars 3 are in a relatively simple "straight plate shape", and the structures of the remaining two are a combination of a bent section 3 - 1, a starting section 3 - 2, and an ending section 3 - 3. And these two "Z-shaped" folding rotating bars 3 are arranged on the same connecting side plate 2.

[0051] On the other hand, the number of the folding end point indicating grooves 6 can be 1 or 2, that is, at the lower position below the lower inner hinge shaft 9, another folding end point indicating groove 6 can also be provided. This structure is slightly different from the appendix Figure 5 but the principle is the same.

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

[0053] In this embodiment, the outer hinge shaft 7 and the inner hinge shaft 9 both have end limit structures, which prevent the plug-in objects from separating from each other after the plug-in is completed, that is, the vertical middle plate 1 and the folding rotating bar 3, and the connecting side plate 2 and the folding rotating bar 3 can only rotate relative to each other and cannot be separated from each other.

[0054] The side edge of the vertical middle plate 1 is also provided with a folding end point indicating opening 8 for engaging with the outer hinge shaft 7 .

[0055] In this embodiment, the function of the folding end point indicator opening 8 is the same as that of the folding end point indicator groove 6, which is used to limit the further rotation of the folding rotating bar 3. When the outer hinge shaft 7 is inserted into the folding end point indicator opening 8, the distance between the two connecting side panels 2 is the preset and actually required folding size of the hinge.

[0056] Of course, this is not necessarily the maximum folding range of the hinge, and the folding and folding effect must also take into account other usage restrictions of the folding sofa structure. In other words, the transverse excavation depth of the folding end point indicator opening 8 and the folding end point indicator groove 6 may be relatively small, for example, 10%-30% of the transverse dimension of the vertical middle plate 1.

[0057] The stacking end point indicating opening 8 and / or the folding end point indicating groove 6 can be arranged slightly below the two groups of the inner hinge shafts 9. Compared with the stacking end point indicating opening 8 and the folding end point indicating groove 6, which have the same height and are close to each other, the latter is located higher.

[0058] Finally, there is no specific requirement for the shapes of the stacking end point indicating opening 8 and the folding end point indicating groove 6 , and they may be, for example, rectangular, semicircular, triangular, etc.

[0059] A folding sofa structure including the hinge comprises two sofa armrest uprights a respectively arranged on the two connecting side panels 2.

[0060] In this embodiment, the two sofa armrest uprights a are always parallel to each other, and when the distance between them is the largest, it 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 bar 3 is in a horizontal state, and the sofa armrest upright plate a has the largest supporting upper surface, thereby providing a sufficiently comfortable armrest effect.

[0062] When the user's arm accidentally presses down the vertical middle plate 1, it will only further compress the upper protruding block 4 and will not accidentally fold up the hinge, which is very safe and practical. Correspondingly, it is required that the upper protruding block 4 and even the entire hinge have sufficient structural rigidity and hardness.

[0063] It further includes a cross plate b disposed between the two sofa armrest vertical plates a and used to block and limit the two sofa armrest vertical plates a that have been folded and retracted.

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

[0065] At this time, the width of the cross plate b is relatively large. The above-mentioned blocking and limiting effect can be a supplement and replacement for the folding end point indication effect at the folding end point indication groove 6 and the folding end point indication opening 8. Specifically as follows:

[0066] First, when the inner side of the sofa armrest vertical plate a abuts against the side of the cross plate b, and at the same time, the bent section 3-1 is inserted into the folding end point indication groove 6 and the outer hinge shaft 7 is inserted into the folding end point indication opening 8, the above-mentioned blocking and limiting effect is "supplementary", making the folded state of the armrest more stable;

[0067] Second, when the inner side of the sofa armrest vertical plate a abuts against the side of the cross plate b, it occurs earlier than the bent section 3-1 is inserted into the folding end point indication groove 6 and earlier than the outer hinge shaft 7 is inserted into the folding end point indication opening 8. Then the above-mentioned blocking and limiting effect is "replacement". At this time, the folded armrest may temporarily require a larger folding and retracting width. If the cross plate b is further combined with its own width adjustable function, the folding end point indication function of the folding end point indication groove 6 and the folding end point indication opening 8 can be restored to effectiveness.

[0068] The number of the hinge is 2, and the two vertical middle plates 1 are respectively disposed at both ends of the cross plate b.

[0069] In this embodiment, the second function of the cross plate b is to connect the 2 hinges into a whole, further enhancing the structural strength of the entire folding armrest. This second function is independent of the above-mentioned first function and has nothing to do with the width dimension of the cross plate b.

[0070] Finally, 1 or 2 cross plates b can be disposed between the two sofa armrest vertical plates a, arranged one above the other, that is, corresponding to 2 or 4 hinges, as long as the installation positions of the cross plate b and the hinge do not affect other functions of the sofa armrest.

[0071] The embodiments of the present utility model have been described in detail in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the relevant technical field, various modifications can be made without departing from the gist of the present utility model. These are all non-creative modifications and are protected by the Patent Law as long as they are within the scope of the claims of the present utility model.

Claims

1. A hinge, characterized in that: The structure comprises a vertical middle plate (1), a connecting side plate (2), and a folding rotating bar (3) which is hinged at both ends to the vertical middle plate (1) and the connecting side plate (2) and is used to be close to the vertical middle plate (1) and the connecting side plate (2) by lifting the vertical middle plate (1) upward.

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

3. A hinge according to claim 2, characterized in that: Two upper protruding blocks (4) for blocking and limiting each other are respectively provided on the proximal ends of the two folding rotating bars (3).

4. A hinge according to claim 2, characterized in that: Two sections of lower teeth (5) for mutual meshing are also respectively provided on the proximal ends of the two folding rotating bars (3).

5. A hinge according to claim 2, characterized in that: At least one of the folding rotating bars (3) comprises a bending section (3-1); and a folding end point indicating groove (6) for engaging with the bending section (3-1) is also provided on the side edge of the vertical middle plate (1).

6. A hinge according to claim 2, characterized in that: The folding rotating bar (3) and the connecting side plate (2) are also provided with an outer hinge shaft (7).

7. A hinge according to claim 6, characterized in that: A folding end point indicator opening (8) for engaging the outer hinge shaft (7) is also provided on the side of the vertical middle plate (1).

8. A folding sofa structure comprising the hinge according to claim 2, characterized in that: It comprises two sofa armrest uprights (a) respectively arranged on the two connecting side panels (2).

9. A folding sofa structure comprising a hinge according to claim 8, characterized in that: It also includes a horizontal plate (b) which is arranged between the two sofa armrest upright plates (a) and is used to block and limit the two sofa armrest upright plates (a) that have been folded and retracted.

10. A folding sofa structure comprising a hinge according to claim 9, characterized in that: The number of the hinged parts is 2, and the two vertical intermediate plates (1) are respectively arranged at the two end positions of the horizontal plate (b).

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