Triple-folding sofa bed frame
By designing a three-fold sofa bed frame, and utilizing a combination of trusses, rotating frames, and support frames, the problems of small area and unstable support in existing sofa beds are solved, achieving the effect of large-area unfolding and stable support.
Patent Information
- Application Number
- CN202520618198.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-04-02
AI Technical Summary
Existing sofa beds have a small unfolded area and lack an effective support structure, resulting in instability during use.
Design a three-fold sofa bed frame, including a truss, a rotating frame, a diagonal brace, and a support frame. Through the cooperation of multiple pivots and limit bolts, it can flexibly switch between sofa and bed, and provide stable support when unfolded.
This design achieves a sofa bed with a large unfolded area, a stable structure, and is easy to move and fold, making it suitable for use as multifunctional furniture.
Smart Images
Figure CN223759521U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of sofa bed, concretely relates to a three-fold sofa bed frame. BACKGROUND
[0002] Sofa bed refers to the furniture that can be used as sofa and bed. Modern room layout advocates simplicity, and multi-functional furniture is becoming the choice of the public, and sofa bed is one of them. In small-sized room, a sofa bed is necessary to meet the occasional needs of the visitors. The existing sofa bed is unfolded and folded through folding, and the sofa back is erected as sofa, and the sofa back is laid down as bed, but the unfolded bed area is small, and the fixing mechanism is mostly at the two ends of the shaft rod, and there is no supporting structure below after the sofa back is laid down. UTILITY MODEL CONTENT
[0003] The utility model discloses a three-fold sofa bed frame, simple structure is convenient for the two form switching of sofa and bed, is big after unfolding, can be folded when carrying, and the structure is stable when being used as bed or sofa, practicality is strong, is suitable for promotion.
[0004] The utility model provides the following technical scheme: a three-fold sofa bed frame, including truss, be equipped with the receiving groove on the truss, the receiving groove front end penetrates through, and be equipped with the first rotary frame through the first pivot, the first rotary frame is equipped with the inclined support frame on the side away from the first pivot, the inclined support frame is equipped with the clamping groove on the side to the first rotary frame,
[0005] The outer side of the truss away from the first pivot side is installed with the second rotary frame through the second pivot, the top of the second rotary frame is equipped with the limiting peg through the slot sliding, the other side of the limiting peg is equipped with the support frame, the limiting peg is connected through the cross type slot sliding of support frame, the support frame is received in the clamping groove, the limiting peg is equipped with the lug, the lug is matched with the shape of the slot, and the slot wall is equipped with two groups of sliding grooves for the lug sliding insertion.
[0006] Preferably, the truss is fixedly provided with a blocking wall, the inclined support frame is rotatably connected with the first rotary frame through a third pivot, is attached to the blocking wall, and forms an obtuse angle with the first rotary frame, the support frame is attached to the clamping groove, and is parallel to the second rotary frame.
[0007] Preferably, the truss bottom is fixedly provided with a supporting leg below the first pivot and the second pivot, when the first rotary frame is in the same straight line with the truss, the height of the supporting leg is the same as the height of the inclined support frame, when the second rotary frame is in the same straight line with the truss, the lug is located in the other group of sliding grooves of the clamping groove, and the support frame is inclined outward and is the same height as the supporting leg.
[0008] Preferably, the outer side of the second rotating frame is provided with a sliding rail, on which a bracket is slidably mounted, and the bracket extends above the support frame.
[0009] The beneficial effects of this utility model are: simple structure, easy to switch between sofa and bed modes, large unfolded area, foldable for transport, and stable structure when used as a bed or sofa, making it highly practical, as detailed below:
[0010] (1) This utility model is provided with a first rotating frame. When the sofa bed is being moved, the diagonal support frame can be folded up and attached to the first rotating frame. The second rotating frame rotates to be parallel to the truss, so that the sofa back can be folded up for easy handling. When the diagonal support frame needs to be supported, it leans against the blocking wall. When the sofa bed is used as a sofa, the first rotating frame is folded into the storage slot. At this time, the support frame is stuck in the slot of the diagonal support frame and is in an inclined state to support the sofa back. When the sofa bed is used as a bed, the first rotating frame is rotated to make it flip half a turn and the second rotating frame is laid flat to obtain a three-sided bed board, so that the sofa bed can have a larger area when unfolded.
[0011] (2) This utility model is provided with a diagonal brace and a support frame. When the sofa bed is converted from a sofa to a bed, the limiting bolt is pulled to separate the protrusion from the slot of the second rotating frame. At this time, the support frame can rotate. When the truss, the first rotating frame and the second rotating frame are in a straight line, the diagonal brace is blocked outward by the blocking wall, and the support frame tilts outward. At this time, the protrusion is inserted into another set of slots, and the angle of the support frame is fixed. At this time, the diagonal brace and the support frame are supported on the four legs of the bed. The pivot connection is also supported by the support legs, making it more stable when used as a bed. Attached Figure Description
[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0013] Figure 1 This is an overall schematic diagram of the present invention;
[0014] Figure 2 This is a cross-sectional view of the bed shape of this utility model;
[0015] Figure 3 This is an enlarged view of point A of this utility model;
[0016] Figure 4 This is an enlarged view of section B of this utility model;
[0017] The following are marked in the diagram: 1. Truss; 2. Storage slot; 3. First rotating frame; 4. Support leg; 5. First pivot; 6. Diagonal brace; 7. Slot; 8. Second rotating frame; 9. Second pivot; 10. Support frame; 11. Sliding rail; 12. Bracket; 13. Limit bolt; 14. Slot; 15. Protrusion; 16. Third pivot; 17. Blocking wall. Detailed Implementation
[0018] 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.
[0019] 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.
[0020] 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 fixed 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0021] The structural features of this utility model will now be described in detail with reference to the accompanying drawings.
[0022] See Figures 1-2A three-fold sofa bed frame includes a truss 1, a sofa panel installed between two trusses 1, a storage groove 2 on the truss 1 with its front end through, and a first rotating frame 3 installed via a first pivot 5, a sofa panel installed between two first rotating frames 3, a diagonal support frame 6 installed on the side of the first rotating frame 3 away from the first pivot 5, a slot 7 on the side of the diagonal support frame 6 facing the first rotating frame 3, a second rotating frame 8 installed on the outer side of the truss 1 away from the first pivot 5 via a second pivot 9, a limiting bolt 13 slidably provided on the top of the second rotating frame 8 via a slot 14, a support frame 10 on the other side of the limiting bolt 13, a sliding rail 11 on the outer side of the second rotating frame 8, a bracket 12 slidably provided on the sliding rail 11, the bracket 12 extending above the support frame 10, a sofa panel installed on the bracket 12, and the bracket 12 can slide upwards, allowing the diagonal support frame 6 to flip, and a section of the support frame 10 stored in the slot 7, so that the second rotating frame 8 is kept in a diagonal backrest state.
[0023] See Figure 1 , 3 The limiting bolt 13 is slidably connected to the cross-shaped slot of the support frame 10, so that the limiting bolt 13 and the support frame 10 will not rotate. The limiting bolt 13 is provided with a protrusion 15, which matches the shape of the slot 14. The slot 14 is provided with two sets of sliding grooves on the groove wall for the protrusion 15 to slide into, so that the support frame 10 and the second rotating frame 8 can have two angles.
[0024] See Figure 2 , 4 The truss 1 is fixedly provided with a blocking wall 17. The diagonal brace 6 is rotatably connected to the first rotating frame 3 through the third rotating shaft 16. It is attached to the blocking wall 17 and forms an obtuse angle with the first rotating frame 3 to support the diagonal brace 6. The support frame 10 is attached to the slot 7 and is parallel to the second rotating frame 8. The second rotating frame 8 is in an inclined state and serves as a support for the sofa backrest. The bottom of the truss 1 is fixedly provided with a support leg 4 below the first rotating shaft 5 and the second rotating shaft 9. When the first rotating frame 3 and the truss 1 are on the same straight line, the height of the support leg 4 is the same as the height of the diagonal brace 6. When the second rotating frame 8 and the truss 1 are on the same straight line, the protrusion 15 is located in another set of sliding grooves in the slot 7, and the support frame 10 is inclined outward and is at the same height as the support leg 4, so that the diagonal brace 6 and the support frame 10 are supported on the four legs of the bed. The joint of the rotating shaft is also supported by the support leg 4.
[0025] This utility model's three-fold sofa bed frame has a simple structure, facilitates switching between sofa and bed modes, has a large unfolded area, can be folded for transport, and is structurally stable when used as a bed or sofa. It is highly practical and suitable for widespread adoption.
[0026] For specific usage, please refer to... Figures 1-4When the sofa bed is being moved, the diagonal support frame 6 can be folded up and attached to the first rotating frame 3, and the second rotating frame 8 can be rotated to be parallel to the truss 1, so that the sofa back can be folded up for easy transport. When the diagonal support frame 6 needs to be supported, it leans against the blocking wall 17. When the sofa bed is used as a sofa, the first rotating frame 3 is folded into the storage slot 2. At this time, the support frame 10 is stuck in the slot 7 of the diagonal support frame 6 and is in an inclined state to support the sofa back. When the sofa bed is used as a bed, the first rotating frame 3 is rotated to make it flip half a turn, and the second rotating frame 8 is laid flat to obtain a three-sided bed board.
[0027] See Figure 1 , 2 4. When the sofa bed is converted from a sofa to a bed, the limiting bolt 13 is pulled to separate the protrusion 15 from the slot of the second rotating frame 8. At this time, the support frame 10 can rotate. When the truss 1, the first rotating frame 3, and the second rotating frame 8 are in a straight line, the diagonal brace 6 is blocked outward by the blocking wall 17, and the support frame 10 tilts outward. At this time, the protrusion 15 is inserted into another set of slots 14, and the angle of the support frame 10 is fixed. At this time, the diagonal brace 6 and the support frame 10 are supported on the four legs of the bed, and their pivot connection is supported by the support leg 4.
[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A three-fold sofa bed frame comprising a truss (1), characterized in that, The truss (1) is provided with a receiving groove (2), the receiving groove (2) is through the front end, and the first rotating frame (3) is installed through the first rotating shaft (5), the first rotating frame (3) is installed with the inclined support frame (6) away from the first rotating shaft (5) side, the inclined support frame (6) is provided with a clamping groove (7) towards the first rotating frame (3) side; The outer side of the truss (1) away from the first rotating shaft (5) side is installed with the second rotating frame (8) through the second rotating shaft (9), the top of the second rotating frame (8) is slidably provided with a limiting pin (13) through a slot (14), the other side of the limiting pin (13) is provided with a support frame (10), the limiting pin (13) is slidably connected with the support frame (10) through the cross-shaped slot, the support frame (10) is received in the clamping groove (7), the limiting pin (13) is provided with a protrusion (15), the protrusion (15) is matched with the shape of the slot (14), and two groups of sliding grooves are formed on the slot wall of the slot (14) for the sliding insertion of the protrusion (15).
2. A three-fold sofa bed frame according to claim 1, wherein, The truss (1) is fixedly provided with a blocking wall (17), the inclined support frame (6) is rotatably connected with the first rotating frame (3) through the third rotating shaft (16), is attached to the blocking wall (17), and is at an obtuse angle with the first rotating frame (3), the support frame (10) is attached to the clamping groove (7), and is parallel to the second rotating frame (8).
3. A three-fold sofa bed frame according to claim 2, wherein, The truss (1) is fixedly provided with a support leg (4) below the first rotating shaft (5) and the second rotating shaft (9), when the first rotating frame (3) is in the same straight line with the truss (1), the height of the support leg (4) is the same as the height of the inclined support frame (6), when the second rotating frame (8) is in the same straight line with the truss (1), the protrusion (15) is located in the other group of sliding grooves of the clamping groove (7), and the support frame (10) is inclined outward and is the same height as the support leg (4).
4. The triple-fold sofa bed frame of claim 1 wherein, The outer side of the second rotating frame (8) is provided with a sliding rail (11), the sliding rail (11) is slidably provided with a bracket (12), and the bracket (12) extends above the support frame (10).