Connecting structure of folding frame, folding bed frame, and sofa bed
By incorporating locking and hinge components at the joints of the folding bed frame, the problems of loosening and deformation during long-term use are resolved, improving stability and simplifying the operation process.
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
Existing folding bed frame structures are prone to loosening and deformation under long-term use or when subjected to heavy loads. Furthermore, the folding operation is cumbersome and the stability is insufficient, making it difficult to meet usage requirements.
Locking and hinge components are installed at the joints of the folding bed frame. The frame can be folded by the cooperation of the hinge and locking ends and is fixed in the unfolded position. Sliding locking and abutment components are used to improve the stability of the connection.
It achieves a stable connection of the frame, improves the stability of the folding joints, and simplifies the folding and unfolding operations.
Smart Images
Figure CN2026073074_23072026_PF_FP_ABST
Abstract
Description
A connecting structure for a folding frame, a folding bed frame, and a sofa bed.
[0001] Cross-reference of related applications
[0002] This application claims priority based on Chinese Patent Application No. 2025201038616, filed on January 16, 2025, entitled "A connecting structure for a folding frame, a folding bed frame, 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 connecting structure for a folding frame, a folding frame, and a sofa bed. Background Technology
[0004] Non-folding bed frames are favored for their superior stability, load-bearing capacity, durability, and comfort in providing even support. However, they also have drawbacks such as taking up a lot of space, being inconvenient to move, and potentially being more expensive. They are suitable for users who require high stability and durability, but not so suitable for environments with limited space or where frequent bed movement is necessary. The emergence of folding bed frames has solved the aforementioned problems of large space occupation and inconvenient movement.
[0005] However, the structure of folding bed frames is relatively complex, and the joints are often weak points. Under long-term use or when subjected to heavy weight or external impact, problems such as loosening and deformation can easily occur, which reduces their stability to some extent and affects safety. In addition, some folding beds have cumbersome and complicated folding operations, making them difficult to use and operate. Furthermore, the support at the folding points and legs is poor, resulting in insufficient stability and making it difficult to meet actual usage requirements.
[0006] Utility Model Content
[0007] This utility model provides a connecting structure for a folding frame, a folding frame, and a sofa bed, which can realize the folding of the frame, with a stable connection, simple structure, and simple folding and unfolding operation.
[0008] To solve the above-mentioned technical problems, this utility model provides a connection structure for a folding frame, including a first frame and a second frame, wherein the first frame and the second frame are folded together, the first frame is provided with at least two first connectors, and the second frame is provided with second connectors corresponding to the first connectors;
[0009] The first connector and the second connector include a hinge end and a locking end. The hinge ends are hinged together so that the first frame and the second frame can switch between an unfolded position and a folded position.
[0010] It also includes a third locking element. When the first frame and the second frame are folded to the unfolded position, the first frame and the second frame are located on the same plane, and the locking ends of the first connector and the second connector are locked together by the third locking element.
[0011] When the first frame and the second frame are folded to the folded position, the locking ends of the first connector and the second connector are released from the locking connection.
[0012] In some embodiments, the first connector and the second connector are arranged along the thickness direction of the first frame and the second frame.
[0013] In some embodiments, the hinged end protrudes from the upper frame surface of the first and second frames.
[0014] In some embodiments, the locking end is located on the lower frame surface of the first and second frames.
[0015] In some embodiments, the two locking ends of the first connector and the second connector extend towards each other in a horizontal direction to form a locking portion.
[0016] In some embodiments, the locking portion has a locking hole along the thickness direction.
[0017] In some embodiments, when the first frame and the second frame are folded to the unfolded position, the two locking holes of the first connector and the second connector partially or completely overlap, and the third locking member is inserted into the locking hole.
[0018] In some embodiments, the third locking element includes a support foot and a pin, the pin being disposed at the end of the support foot for insertion into the locking hole.
[0019] This utility model provides a connection structure for a folding frame, including a first frame and a second frame. The first frame and the second frame are folded together. Hinges are provided on the first frame and the second frame. The first frame and the second frame are hinged together through the hinges, so that the first frame and the second frame can switch between an unfolded position and a folded position.
[0020] A sliding locking member is provided on the other side of the frame edge where the hinge of the first frame is located. The sliding locking member can slide along the frame edge of the first frame to the same side of the frame edge of the second frame. The first frame includes a first abutting member, and the second frame includes a second abutting member.
[0021] When the first frame and the second frame are folded to the unfolded position, the first frame and the second frame are on the same plane, the first abutting member and the second abutting member abut each other, and the sliding locking member partially slides into the frame edge of the second frame; when the first frame and the second frame are folded to the folded position, the sliding locking member is located in the first frame, and the first abutting member and the second abutting member are released from contact.
[0022] In some embodiments, the first abutment and the second abutment include abutment portions that are parallel to the sliding locking member, and when the first frame and the second frame are folded to the unfolded position, the abutment portions of the first abutment and the second abutment abut against each other.
[0023] In some embodiments, the frame edge where the sliding locking member is located is provided with a limiting slide, and the sliding locking member slides along the limiting slide.
[0024] In some embodiments, the sliding locking member is provided with a limiting post, which is inserted into the limiting slide and can slide along the limiting slide.
[0025] In some embodiments, the sliding lock is provided with a sliding handle.
[0026] In some embodiments, the folding angle between the first frame and the second frame is in the range of 0-180°. When the frame is in the unfolded position, the folding angle is 180°, and when the frame is in the folded position, the folding angle is 0°.
[0027] To address the aforementioned problems, this utility model also provides a folding bed frame, including the aforementioned connection structure of the folding frame.
[0028] To address the aforementioned issues, this utility model also provides a sofa bed, including the aforementioned folding bed frame.
[0029] Compared to existing technologies, this utility model connects two frames together by setting a locking element at the folding joint on the folding bed frame. This allows the folding joint to be fixed when the folding bed frame is in the unfolded position, enabling the folding bed frame to be folded in half and remain stable when unfolded. This improves the stability of the folding joint and simplifies the folding and unfolding operation. Attached Figure Description
[0030] Figure 1 is a schematic diagram of the folded frame of Embodiment 1 in a half-folded position;
[0031] Figure 2 is a schematic diagram of the folding frame in the unfolded position in Embodiment 1;
[0032] Figure 3 is an enlarged view of the folded connection in Figure 2;
[0033] Figure 4 is a schematic diagram of the folding frame before assembly in Example 1;
[0034] Figure 5 is a front view of Figure 4;
[0035] Figure 6 is an enlarged view of the folded connection in Figure 5;
[0036] Figure 7 is a schematic diagram of the folding frame of Embodiment 1 when it is in the unfolded position and locked.
[0037] Figure 8 is a front view of Figure 7;
[0038] Figure 9 is an enlarged view of the folded connection in Figure 8;
[0039] Figure 10 is a schematic diagram of the folding frame in the unfolded position in Embodiment 2;
[0040] Figure 11 is a schematic diagram of the folding frame in the folded position of Embodiment 2;
[0041] Figure 12 is a top view of Figure 11;
[0042] Figure 13 is a schematic diagram of the folding frame in Embodiment 2 when it is not locked;
[0043] Figure 14 is an enlarged view of the folded connection in Figure 12;
[0044] Figure 15 is a top view of Figure 13;
[0045] Figure 16 is an enlarged view of the folded connection in Figure 15;
[0046] Figure 17 is a schematic diagram of the folding frame locked in Embodiment 2;
[0047] Figure 18 is an enlarged view of the folded connection in Figure 17;
[0048] Figure 19 is a top view of Figure 17;
[0049] Figure 20 is an enlarged view of the folded connection in Figure 19. Detailed Implementation
[0050] 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.
[0051] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are 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, and therefore should not be construed as a limitation of 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.
[0052] 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.
[0053] Example 1
[0054] This embodiment provides a folding frame connection structure applied to the seat of a sofa bed, including a first frame 1 and a second frame 2. The first frame 1 and the second frame 2 are folded together. The first frame 1 is provided with at least two first connectors 3, and the second frame 2 is provided with second connectors 4 corresponding to the first connectors 3. The first connectors 3 and the second connectors 4 include hinge ends 31 and 41, and locking ends 32 and 42. The hinge ends 31 and 41 are hinged together so that the first frame 1 and the second frame 2 can switch between an unfolded position and a folded position. The folding angle between the first frame 1 and the second frame 2 is in the range of 0-180°. When in the unfolded position, the folding angle is 180°, and when in the folded position, the folding angle is 0°.
[0055] It also includes a third locking member 5. When the first frame 1 and the second frame 2 are folded to the unfolded position, the first frame 1 and the second frame 2 are located on the same plane, and the locking ends 41 and 42 of the first connector 3 and the second connector 4 are locked together by the third locking member 5. When the first frame 1 and the second frame 2 are folded to the folded position, the locking ends 41 and 42 of the first connector 3 and the second connector 4 are unlocked.
[0056] Specifically, the first connector 3 and the second connector 4 are arranged along the thickness direction of the first frame 1 and the second frame 2, and the hinge ends 31 and 32 protrude from the upper frame surfaces of the first frame 1 and the second frame 2. The locking ends 41 and 42 are located on the lower frame surfaces of the first frame 1 and the second frame 2 and are fixed to the lower frame surfaces.
[0057] The two locking ends 41 and 42 of the first connector 3 and the second connector 4 extend towards each other in the horizontal direction to form a locking part. The locking part has a locking hole in the thickness direction. When the first frame 1 and the second frame 2 are folded to the unfolded position, the two locking holes of the first connector 3 and the second connector 4 partially or completely overlap. The third locking member 5 includes a support foot 51 and a pin 52. The pin 52 is located at the end of the support foot 51 and is inserted into the locking hole, thereby locking the two locking ends 41 and 42 together. The support foot 51 is used to support the ground.
[0058] The unfolding and folding process of the folding frame in this embodiment is as follows:
[0059] When the user needs to install the sofa bed seat frame, due to the presence of hinge ends 31 and 32, the first frame 1 and the second frame 2 can be unfolded to a folding angle of 180°. At this time, the first frame 1 and the second frame 2 are on the same horizontal plane, and the two locking holes on the locking parts of the locking ends 41 and 42 of the first frame 1 and the second frame 2 are aligned until they partially overlap (i.e., the overlapping space allows the pin 52 of the third locking member 5 to be inserted). Then, the pin 52 of the third locking member 5 is inserted into the locking hole, thereby fixing the folding connection. Then, the unfolded folding frame is placed on the seat of the sofa bed with the support legs 51 facing down. At the same time, a base plate for installing springs is covered on top of the folding frame. When the user needs to store or disassemble the folding frame, the folding frame is flipped off the sofa bed so that the third locking member 5 faces up, and then the third locking member 5 is pulled out to release the locking ends 41 and 42. The first frame 1 and the second frame 2 are then folded to the half-fold position.
[0060] In this embodiment, the folding frame, while achieving the folding connection, also includes locking ends 41 and 42. The two locking ends 41 and 42, located respectively in the first frame 1 and the second frame 2, are locked together at the folding connection using a pin 52. This locks the folding frame in the unfolded position, resulting in stronger connection stability at the folding connection and simplifying the folding and unfolding operations.
[0061] Example 2
[0062] This embodiment provides a connection structure for a folding frame applied to the backrest frame of a sofa bed. It includes a first frame 1 and a second frame 2, which are folded together. Hinges are provided on the first frame 1 and the second frame 2, and the first frame 1 and the second frame 2 are hinged together by the hinges, allowing the first frame 1 and the second frame 2 to switch between an unfolded position and a folded position. The folding angle between the first frame 1 and the second frame 2 is within the range of 0-180°. When in the unfolded position, the folding angle is 180°, and when in the folded position, the folding angle is 0°.
[0063] A sliding locking member 8 is provided on the other side of the frame edge where the hinge member 6 of the first frame 1 is located. A limiting slide 801 is provided on the frame edge where the sliding locking member 8 is located. The sliding locking member 8 has a sliding handle, and a limiting post 802 is provided on the opposite side of the sliding handle. The limiting post 801 is inserted into the limiting slide 802. Under the action of the sliding handle, the limiting post 802 slides along the limiting slide 801, thereby allowing the sliding locking member 8 to slide along the frame edge of the first frame 1 to the same side of the frame edge of the second frame 2. The first frame 1 includes a first abutting member 7, and the second frame 2 includes a second abutting member 9. The first abutting member 7 and the second abutting member 9 each have an abutting portion, which is parallel to the sliding locking member 8. When the first frame 1 and the second frame 2 are folded to the unfolded position, the first frame 1 and the second frame 2 are located on the same plane, and the abutting portions of the first abutting member 7 and the second abutting member 9 abut against each other. The sliding locking member 8 partially slides into the frame edge of the second frame 2. The sliding locking member 8 connects the first frame 1 and the second frame 2 together. The abutting portions of the first abutting member 7 and the second abutting member 9 are press-fitted together and abut against each other. When the first frame 1 and the second frame 2 are folded to the folded position, the sliding locking member 8 is located on the first frame 1, and the first abutting member 7 and the second abutting member 9 are released from contact.
[0064] The unfolding and folding process of the folding frame in this embodiment is as follows:
[0065] When the user needs to install the sofa bed seat frame, due to the presence of hinge 6, the first frame 1 and the second frame 2 can be unfolded to a folding angle of 180°. At this point, the first frame 1 and the second frame 2 are on the same horizontal plane, and the abutting parts of the first abutting part 7 and the second abutting part 9 abut against each other. Then, by pulling the sliding handle, the sliding locking part 8 slides from the first frame 1 to the second frame 2, thereby locking the first frame 1 and the second frame 2 together. At the same time, the abutting parts of the first abutting part 7 and the second abutting part 9 also form an interference fit with the locking part 8, which can prevent the sliding locking part 8 from shaking under the action of external force, and the first frame 1 and the second frame 2 are more stably connected together. Then, the unfolded folded frame is placed at the back of the sofa bed, and a base plate for installing springs is placed on top of the folded frame.
[0066] When the user needs to store or disassemble the folding frame, slide the sliding locking piece 8 back onto the first frame 1, then release the abutment of the first abutment piece 7 and the second abutment piece 9, and fold the first frame 1 and the second frame 2 to the folded position.
[0067] This embodiment improves the connection stability of the folding joint by using the sliding locking member 8 and the first abutting member 7 and the second abutting member 9. The sliding locking member 8 connects the first frame 1 and the second frame 2. The abutting parts of the two abutting members are interference fit and abut against each other, making the connection of the folding joint of the folding frame more stable and the unfolding and folding operation simple.
[0068] 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
[0069] This invention connects two frames together by setting a locking element at the folding joint on the folding bed frame. This allows the folding joint to be fixed when the folding bed frame is in the unfolded position, enabling the folding bed frame to be folded in half and remain stable when unfolded. This improves the stability of the folding joint, and the folding and unfolding operations are simple, making it highly practical for industrial use.
Claims
1. A connection structure for a folding frame, comprising a first frame and a second frame, wherein the first frame and the second frame are folded together, characterized in that, The first frame is provided with at least two first connectors, and the second frame is provided with second connectors corresponding to the first connectors; The first connector and the second connector include a hinge end and a locking end. The hinge ends are hinged together so that the first frame and the second frame can switch between an unfolded position and a folded position. It also includes a third locking element. When the first frame and the second frame are folded to the unfolded position, the first frame and the second frame are located on the same plane, and the locking ends of the first connector and the second connector are locked together by the third locking element. When the first frame and the second frame are folded to the folded position, the locking ends of the first connector and the second connector are released from the locking connection.
2. The connection structure of the folding frame according to claim 1, characterized in that, The first connector and the second connector are arranged along the thickness direction of the first frame and the second frame.
3. The connection structure of the folding frame according to claim 2, characterized in that, The hinged end protrudes from the upper frame surface of the first frame and the second frame.
4. The connection structure of the folding frame according to claim 3, characterized in that, The locking end is located on the lower frame surface of the first frame and the second frame.
5. The connection structure of the folding frame according to claim 1, characterized in that, The two locking ends of the first connector and the second connector extend towards each other in the horizontal direction to form a locking part.
6. The connection structure of the folding frame according to claim 5, characterized in that, The locking part has a locking hole along the thickness direction.
7. The connection structure of the folding frame according to claim 6, characterized in that, When the first frame and the second frame are folded to the unfolded position, the two locking holes of the first connector and the second connector partially or completely overlap, and the third locking member is inserted into the locking hole.
8. The connection structure of the folding frame according to claim 7, characterized in that, The third locking element includes a support foot and a pin, the pin being located at the end of the support foot for insertion into the locking hole.
9. A connection structure for a folding frame, comprising a first frame and a second frame, wherein the first frame and the second frame are folded together, characterized in that, The first frame and the second frame are provided with hinges, and the first frame and the second frame are hinged together by the hinges, so that the first frame and the second frame can switch between an unfolded position and a folded position; A sliding locking member is provided on the other side of the frame edge where the hinge of the first frame is located. The sliding locking member can slide along the frame edge of the first frame to the same side of the frame edge of the second frame. The first frame includes a first abutting member, and the second frame includes a second abutting member. When the first frame and the second frame are folded to the unfolded position, the first frame and the second frame are on the same plane, the first abutting member and the second abutting member abut each other, and the sliding locking member partially slides into the frame edge of the second frame; when the first frame and the second frame are folded to the folded position, the sliding locking member is located in the first frame, and the first abutting member and the second abutting member are released from contact.
10. The connection structure of the folding frame according to claim 9, characterized in that, The first abutting member and the second abutting member each include an abutting portion, which is parallel to the sliding locking member. When the first frame and the second frame are folded to the unfolded position, the abutting portions of the first abutting member and the second abutting member abut against each other.
11. The connection structure of the folding frame according to claim 10, characterized in that, The frame edge where the sliding locking member is located is provided with a limiting slide, and the sliding locking member slides along the limiting slide.
12. The connection structure of the folding frame according to claim 11, characterized in that, The sliding locking component is provided with a limiting post, which is inserted into the limiting slide and can slide along the limiting slide.
13. The connection structure of the folding frame according to claim 10, characterized in that, The sliding locking component is equipped with a sliding handle.
14. The connection structure of the folding frame according to any one of claims 1-13, characterized in that, The folding angle between the first frame and the second frame is in the range of 0-180°. When the frame is in the unfolded position, the folding angle is 180°, and when the frame is in the folded position, the folding angle is 0°.
15. A folding bed frame, characterized in that, The connection structure of the folding frame as described in any one of claims 1-14.
16. A sofa bed, characterized in that, Includes the folding bed frame as described in claim 15.