Folding hinge connecting structure of sofa bed and sofa bed
By incorporating segmented connecting grooves and connecting columns on the support surface of the folding hinge, the problem of existing folding sofa beds being unable to be disassembled and assembled is solved, achieving convenient disassembly and assembly as well as space saving.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- NEW TEC INTEGRATION (XIAMEN) CO LTD
- Filing Date
- 2026-01-16
- Publication Date
- 2026-07-23
AI Technical Summary
The existing folding sofa bed's hinge connection structure cannot be disassembled when not in use, thus taking up space.
A folding hinge connection structure is designed. A first connecting groove is set on the support surface of the second arm, and a first connecting post is set on the second bed frame. The connecting groove is divided into two parts with different diameters. The flange slides between the two parts to realize the switching of the folding hinge's active and locked positions. Combined with the locking element, the connection stability is enhanced.
It enables easy assembly and disassembly of the folding hinge, saves transportation space, and improves ease of use.
Smart Images
Figure CN2026073107_23072026_PF_FP_ABST
Abstract
Description
A folding hinge connection structure for a sofa bed and the sofa bed itself.
[0001] Cross-references to related applications
[0002] This application claims priority based on Chinese Patent Application No. 2025201032874, filed on January 16, 2025, entitled "A Folding Hinge Connection Structure for a Sofa Bed and a Sofa Bed", the contents of which are incorporated herein by reference. Technical Field
[0003] This utility model relates to the field of furniture, and in particular to a folding hinge connection structure for a sofa bed and a sofa bed. Background Technology
[0004] A folding sofa bed is a multifunctional piece of furniture that combines the functions of a sofa and a bed. It can be folded into a sofa shape when not in use, saving space and making it suitable for small apartments or situations where a temporary bed is needed. It typically uses hinges to convert between sofa and bed modes. Currently, the folding hinges of folding sofa beds are fixed at one end to the armrests and at the other end to the backrest frame. However, this connection method, by fixing the backrest frame and armrests in place, prevents folding when not in use, is inconvenient to assemble and disassemble, and takes up space.
[0005] Utility Model Content
[0006] The technical problem to be solved by this utility model is to provide a folding hinge connection structure for a sofa bed and a sofa bed that is easy to assemble and disassemble and saves transportation space.
[0007] To solve the above-mentioned technical problems, this utility model provides a folding hinge connection structure for a sofa bed, including a left armrest, a right armrest, and a bed frame. The bed frame includes a first bed frame and a second bed frame arranged sequentially along the width direction of the armrest. The folding hinge includes a first arm and a second arm hinged at one end, and the other end of the first arm is fixedly connected to the left armrest or the right armrest. The second arm extends from the end away from the first arm to form a support surface for supporting the second bed frame. A first connecting groove is provided on the support surface, and the second bed frame is provided with a first connecting post that cooperates with the first connecting groove.
[0008] The first connecting slot is divided into a first part and a second part that are interconnected, so that the folding hinge can switch between a locked position and an active position;
[0009] The end of the first connecting post extends radially outward with a flange. The diameter of the first part is larger than that of the flange, and the diameter of the second part is smaller than that of the flange. When the folding hinge is in the active position, the flange is located in the first part. When the folding hinge is in the locked position, the flange slides into the second part.
[0010] In some embodiments, the support surface is further provided with a first locking hole.
[0011] In some embodiments, the second bed frame is provided with a second locking hole that mates with the first locking hole.
[0012] In some embodiments, a first locking member is also included, which passes through the first locking hole and the second locking hole when the folding hinge is in the locked position, and locks the folding hinge to the second bed frame.
[0013] This utility model also provides a sofa bed, characterized in that it includes the folding hinge connection structure of the sofa bed described above.
[0014] In some embodiments, the left and right armrests extend into support rods for supporting the first bed frame in a direction that brings them closer together.
[0015] In some embodiments, the support rod is provided with a second connecting groove, and the first bed frame is provided with a second connecting post that cooperates with the second connecting groove.
[0016] In some embodiments, the second connecting slot is divided into a third and a fourth interconnected portion, so that the first bed frame can switch between a locked position and an active position.
[0017] In some embodiments, the end of the second connecting post extends radially outward with a flange, the diameter of the third portion is larger than that of the flange of the second connecting post, and the diameter of the fourth portion is smaller than that of the flange of the second connecting post.
[0018] In some embodiments, when the first bed frame is in the active position, the flange of the second connecting post is located in the third portion, and when the first bed frame is in the locked position, the flange of the second connecting post slides into the second portion.
[0019] In some embodiments, a third locking hole is provided on the uprights of the left and right handrails.
[0020] In some embodiments, the left and right sides of the first bed frame are provided with fourth locking holes that cooperate with the third locking hole.
[0021] In some embodiments, a second locking member is also included, which passes through the third and fourth locking holes and locks the first bed frame to the left and right armrests when the first bed frame is in the locked position.
[0022] Compared with the prior art, the beneficial effects of this utility model are that by setting a first connecting groove on the support surface of the second arm of the folding hinge, and setting a first connecting post with a specific flange on the second bed frame, the first connecting groove is divided into a first part and a second part that are connected. The diameter of the first part is larger than the diameter of the flange, and the diameter of the second part is smaller than the diameter of the flange. The flange can slide between the first part and the second part, so that the folding hinge can switch between the active position and the locked position, which facilitates the disassembly and assembly of the second bed frame and the folding hinge and saves transportation space. Attached Figure Description
[0023] Figure 1 is a schematic diagram of the sofa bed without the bed frame installed in a preferred embodiment of the present invention;
[0024] Figure 2 is a schematic diagram of the installation of the first bed frame of the sofa bed in a preferred embodiment of the present invention;
[0025] Figure 3 is a schematic diagram of the sofa bed in the locked position in a preferred embodiment of the present invention;
[0026] Figure 4 is a schematic diagram of the installation of the second bed frame of the sofa bed in a preferred embodiment of the present invention;
[0027] Figure 5 is a schematic diagram of the second bed frame of the sofa bed in the locked position in a preferred embodiment of the present invention;
[0028] Figure 6 is an external view of the sofa bed in an embodiment of the present invention;
[0029] Figure 7 shows another angle view of the sofa bed in an embodiment of the present invention. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0033] This embodiment provides a sofa bed, including a bed board 9, a mattress 1, and a folding hinge connection structure. The bed board 9 is divided into a first bed board 94 connected to a first bed frame 5 and a second bed board 95 connected to a second bed frame 6.
[0034] The folding hinge connection structure includes a left armrest 3, a right armrest 4, and a bed frame. The bed frame includes a first bed frame 5 and a second bed frame 6 arranged sequentially along the width direction of the armrests. The folding hinge 7 includes a first arm 71 and a second arm 72 hinged at one end. The other end of the first arm 71 is fixedly connected to the left armrest 3 or the right armrest 4. The end of the second arm 72 away from the first arm 71 extends into a support surface 721 for supporting the second bed frame 6. A first connecting groove is provided on the support surface 721. The second bed frame 6 is provided with a first connecting post 62 that cooperates with the first connecting groove. The first connecting groove is divided into a first part and a second part that are interconnected, so that the folding hinge 7 can switch between a locked position and a movable position.
[0035] The end of the first connecting post 62 extends radially outward with a flange. The diameter of the first part is larger than that of the flange, and the diameter of the second part is smaller than that of the flange. When the folding hinge 7 is in the active position, the flange is located in the first part. When the folding hinge 7 is in the locked position, the flange slides into the second part.
[0036] When connecting the second bed frame 6 and the folding hinge 7, insert the first connecting post 62 into the first part, and then push the first connecting post into the second part in the horizontal direction. This allows the flange and the second part to engage and complete the installation. When disassembling the second bed frame 6 and the folding hinge 7, push the first connecting post 62 out of the second part into the first part. At this time, the flange slides into the first part, releasing the engagement and completing the disassembly.
[0037] To further enhance the connection stability between the second bed frame and the folding hinge, a threaded hole is provided on the support surface 721 as a first locking hole. The second bed frame 6 is provided with a threaded hole 61 that mates with the first locking hole as a second locking hole. A bolt is also included as a first locking element. When the folding hinge 7 is in the locked position, the first locking element passes through the first and second locking holes, locking the folding hinge 7 to the second bed frame 6.
[0038] In this embodiment, for the installation of the first bed frame 5, the left armrest 3 and the right armrest 4 extend in a direction closer to each other to form support rods 31 and 41 for supporting the first bed frame. The support rods 31 and 41 are provided with a second connecting groove 311, and the first bed frame 5 is provided with a second connecting post 52 that mates with the second connecting groove 311. The second connecting groove 311 is divided into a third part 3111 and a fourth part 3112 that are interconnected, allowing the first bed frame 5 to switch between a locked position and an open position. The end of the second connecting post 52 extends radially outward with a flange 521. The diameter of the third part 3111 is larger than the flange 521 of the second connecting post 52, and the diameter of the fourth part 3112 is smaller than the flange 521 of the second connecting post 52. When the first bed frame 5 is in the open position, the flange 521 of the second connecting post 52 is located in the third part 3111; when the first bed frame 5 is in the locked position, the flange 521 of the second connecting post 52 slides into the fourth part 3112.
[0039] When installing the first bed frame 5, insert the second connecting post 52 of the first bed frame 5 into the third part 3111, and then push the second connecting post 52 horizontally into the fourth part 3112. This allows the flange 521 of the second connecting post 52 to engage with the fourth part 3112 to complete the installation. When disassembling the first bed frame 5, push the second connecting post 52 out of the fourth part 3112 into the third part 3111. At this time, the flange 521 of the second connecting post 52 is released from its engagement with the fourth part 3112, completing the disassembly.
[0040] To further secure the first bed frame 5 and the armrests, threaded holes 421 are provided on the uprights 32 and 42 of the left armrest 3 and right armrest 4 as third locking holes. Threaded holes 53, which mate with the third locking holes, are provided on the left and right sides of the first bed frame 5 as fourth locking holes. Bolts are also included as second locking elements. When the first bed frame is in the locked position, the second locking elements pass through the third and fourth locking holes, locking the first bed frame to the left armrest 3 and right armrest 4.
[0041] The above description is only a preferred embodiment of the present utility model, but the design concept of the present utility model is not limited thereto. Any non-substantial modifications made to the present utility model by those skilled in the art within the scope of the technology disclosed in the present utility model using this concept shall be deemed as an infringement of the protection scope of the present utility model. Industrial applicability
[0042] This invention provides a first connecting groove on the support surface of the second arm of a folding hinge, and a first connecting post with a specific flange on the second bed frame. The first connecting groove is divided into a first part and a second part that are connected. The diameter of the first part is larger than the diameter of the flange, and the diameter of the second part is smaller than the diameter of the flange. The flange can slide between the first part and the second part, so that the folding hinge can switch between the active position and the locked position. This facilitates the assembly and disassembly of the second bed frame and the folding hinge, saves transportation space, and has good industrial applicability.
Claims
1. A folding hinge connection structure for a sofa bed, comprising a left armrest, a right armrest, and a bed frame, wherein the bed frame includes a first bed frame and a second bed frame arranged sequentially along the width direction of the armrest; the folding hinge includes a first arm and a second arm hinged at one end, the other end of the first arm being fixedly connected to the left armrest or the right armrest, characterized in that, The second arm extends from the end away from the first arm to form a support surface for supporting the second bed frame. The support surface is provided with a first connecting groove, and the second bed frame is provided with a first connecting post that mates with the first connecting groove. The first connecting slot is divided into a first part and a second part that are interconnected, so that the folding hinge can switch between a locked position and an active position; The end of the first connecting post extends radially outward with a flange. The diameter of the first part is larger than that of the flange, and the diameter of the second part is smaller than that of the flange. When the folding hinge is in the active position, the flange is located in the first part. When the folding hinge is in the locked position, the flange slides into the second part.
2. The folding hinge connection structure of the sofa bed according to claim 1, characterized in that, The support surface is also provided with a first locking hole.
3. The folding hinge connection structure of the sofa bed according to claim 2, characterized in that, The second bed frame is provided with a second locking hole that mates with the first locking hole.
4. The folding hinge connection structure of the sofa bed according to claim 3, characterized in that, It also includes a first locking member, which passes through the first locking hole and the second locking hole when the folding hinge is in the locked position, and locks the folding hinge to the second bed frame.
5. A sofa bed, characterized in that, The sofa bed includes the folding hinge connection structure as described in any one of claims 1-4.
6. The sofa bed according to claim 5, characterized in that, The left and right armrests extend into support rods that move closer to each other to support the first bed frame.
7. The sofa bed according to claim 6, characterized in that, The support rod is provided with a second connecting groove, and the first bed frame is provided with a second connecting post that cooperates with the second connecting groove.
8. The sofa bed according to claim 7, characterized in that, The second connecting groove is divided into a third part and a fourth part that are interconnected, so that the first bed frame can switch between a locked position and an active position.
9. The sofa bed according to claim 8, characterized in that, The end of the second connecting post extends radially outward with a flange, the diameter of the third part is larger than the flange of the second connecting post, and the diameter of the fourth part is smaller than the flange of the second connecting post.
10. The sofa bed according to claim 9, characterized in that, When the first bed frame is in the movable position, the flange of the second connecting post is located in the third part; when the first bed frame is in the locked position, the flange of the second connecting post slides into the second part.
11. The sofa bed according to claim 5, characterized in that, A third locking hole is provided on the uprights of the left and right handrails.
12. The sofa bed according to claim 11, characterized in that, The first bed frame has a fourth locking hole on its left and right sides that mates with the third locking hole.
13. The sofa bed according to claim 12, characterized in that, It also includes a second locking member, which passes through the third and fourth locking holes when the first bed frame is in the locked position, and locks the first bed frame to the left and right armrests.