A sofa bed hidden pulley moving device

Abstract

The utility model relates to sofa bed technical field especially a sofa bed hidden formula pulley moving device, including sofa frame, the inside slide of sofa frame is installed with folding pad, still include: pulley hidden adjusting assembly, pulley hidden adjusting assembly includes slide column, the lower extreme of folding pad is installed with the downward opening's cylinder groove, the inside of cylinder groove is installed to slide column, the periphery end surface of slide column upper extreme with the inside end surface of cylinder groove all are set up the thread groove of mutual cooperation, the periphery end surface of slide column lower extreme sets up multiple groups of toothing, the periphery of cylinder groove rotatoryly is equipped with the swivel, and the one end rotatoryly installed of swivel has the rotary lever, this sofa bed hidden formula pulley moving device has solved the single gyro wheel structure of prior art and has the shortcoming that the stability is poor and is easy to sway.

Description

Technical Field

[0001] This utility model relates to the field of sofa bed technology, and in particular to a hidden pulley moving device for sofa beds. Background Technology

[0002] Sofa beds can be folded and transformed into sofas and beds. To make it easier for users to push and pull folding sofa beds, the bottom of the foldable area of ​​this type of sofa bed is supported by rollers. Although this support method is beneficial for users to push and pull folding, it will reduce stability and make the folding area prone to wobbling. If the rollers are replaced with support columns, it will make it more inconvenient for users to push and pull folding. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as poor stability and easy wobbling due to the single roller structure, by proposing a hidden pulley moving device for sofa beds.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] Design a concealed caster moving device for a sofa bed, including a sofa frame, on the inner side of which a folding cushion is slidably mounted, and further including:

[0006] A pulley concealment adjustment assembly includes a sliding column. A downward-opening cylindrical groove is installed at the lower end of the folding pad. The sliding column is installed inside the cylindrical groove. The outer periphery of the upper end of the sliding column and the inner end of the cylindrical groove are both provided with mating threaded grooves. Multiple sets of toothed grooves are provided on the outer periphery of the lower end of the sliding column. A rotating ring is rotatably fitted around the cylindrical groove. A rotating rod is rotatably mounted on one end of the rotating ring. A second insert tooth is integrally formed on one end of the rotating rod, and the second insert tooth can engage with the interior of the toothed groove. A pulley is rotatably mounted on the lower end of the sliding column.

[0007] Preferably, a limiting groove is formed on the outer wall of the cylindrical groove, and the rotating rod can be housed inside the limiting groove.

[0008] Preferably, one end of the rotating rod is integrally formed with a first insert tooth, which can pass through the limiting groove and engage with the tooth groove.

[0009] Preferably, a rotating groove is formed on the outer end face of the cylindrical groove, and the rotating ring rotates inside the rotating groove to increase the stability of the rotating ring.

[0010] Preferably, the sliding wheel includes two sets of rollers.

[0011] Preferably, a ball is nested at one outer end of the second tooth, and the ball rolls in contact with the surface of the tooth groove to reduce friction.

[0012] The concealed pulley moving device for a sofa bed proposed in this utility model has the following advantages:

[0013] The sliding column, through the set cylindrical groove and sliding column, can slide up and down in the cylindrical groove. The bottom of the sliding column is equipped with a sliding wheel. When the sliding column extends downward, the sliding wheel at the bottom of the sliding column can be used to reduce the friction during pushing, pulling and folding. When the sliding column retracts back into the cylindrical groove, the bottom of the cylindrical groove can be used to provide stable support. Attached Figure Description

[0014] Figure 1 A schematic diagram of the three-dimensional structure with the main body as the core;

[0015] Figure 2 A cross-sectional structural diagram of the main body;

[0016] Figure 3 for Figure 2 A magnified structural diagram of area A;

[0017] Figure 4 A three-dimensional structural diagram of the pulley-concealed adjustment component.

[0018] In the diagram: 1. Sofa frame; 2. Folding cushion; 3. Tube groove; 4. Sliding column; 5. Sliding wheel; 6. Threaded groove; 7. Gear groove; 8. Rotary ring; 9. Rotating rod; 10. First insert tooth; 11. Second insert tooth; 12. Limiting groove. Detailed Implementation

[0019] 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.

[0020] Example 1

[0021] Reference Figures 1-4 A sofa bed with concealed caster movement device includes a sofa frame 1, a folding cushion 2 slidably mounted on the inner side of the sofa frame 1, and further includes:

[0022] The pulley concealment adjustment assembly includes a sliding column 4, a downward-opening cylindrical groove 3 installed at the lower end of the folding pad 2, the sliding column 4 being installed inside the cylindrical groove 3, the outer end face of the upper end of the sliding column 4 and the inner end face of the cylindrical groove 3 both having mutually matching threaded grooves 6, the outer end face of the lower end of the sliding column 4 having multiple sets of toothed grooves 7, a rotating ring 8 being rotatably sleeved around the outer side of the cylindrical groove 3, a rotating rod 9 being rotatably installed at one end of the rotating ring 8, a second insert tooth 11 being integrally formed at one end of the rotating rod 9, the second insert tooth 11 being able to engage with the interior of the toothed groove 7, and a sliding wheel 5 being rotatably installed at the lower end of the sliding column 4.

[0023] Furthermore, refer to Figure 3 A limiting groove 12 is provided on the outer wall of the cylindrical groove 3, and the rotating rod 9 can be housed inside the limiting groove 12;

[0024] Furthermore, refer to Figure 3 , Figure 4 One end of the rotating rod 9 is integrally formed with a first insert tooth 10, which can pass through the limiting groove 12 and engage with the tooth groove 7.

[0025] Furthermore, refer to Figure 3 A rotating groove is provided on the outer end face of the cylindrical groove 3, and the rotating ring 8 rotates inside the rotating groove to increase the stability of the rotating ring 8.

[0026] Furthermore, refer to Figure 4 The sliding wheel 5 includes two sets of rollers.

[0027] Furthermore, a ball is nested at one end of the outer side of the second insert 11, and the ball rolls into contact with the surface of the tooth groove 7 to reduce friction.

[0028] Working principle:

[0029] The sofa frame 1 and the folding cushion 2 are slidably installed together via a track. When it is necessary to pull the folding cushion 2 outward to facilitate its unfolding, refer to... Figure 3 :

[0030] First, pull the rotating rod 9 outward, causing it to rotate along the rotating ring 8. When the rotating rod 9 is parallel to the ground, the second insert 11 will engage with the inside of the tooth groove 7. Then, push the rotating rod 9 laterally, causing the rotating ring 8 to rotate along the cylindrical groove 3. At the same time, the second insert 11 on the rotating rod 9 engages with the tooth groove 7, causing the sliding column 4 to rotate synchronously. When the sliding column 4 rotates, it engages with the cylindrical groove 3 through the tooth groove 7, allowing the sliding column 4 to move up and down. After the rotating rod 9 has made a large displacement, rotate it downward, causing the rotating rod 9 to... The second insert 11 is disengaged from the tooth groove 7, and then the rotating rod 9 is pushed in the opposite direction to return it to its initial position. The rotating rod 9 is rotated upward again, so that the second insert 11 on the rotating rod 9 is inserted into the tooth groove 7 again. Then the rotating rod 9 is pushed horizontally, and the rotating rod 9 drives the rotating ring 8 to rotate along the cylindrical groove 3. This operation is repeated until the cylindrical groove 3 is lifted off the ground and the sliding wheel 5 bears the weight. Finally, the rotating rod 9 is locked into the limiting groove 12. At this time, the first insert 10 will be locked into the tooth groove 7, so that the sliding column 4 cannot rotate freely, thereby fixing the extension height of the sliding column 4 in the cylindrical groove 3.

[0031] As the sliding column 4 rotates and extends downwards, the design of the two sets of rollers in the sliding wheel 5 reduces friction between the rollers and the ground by having the two sets of rollers rotate in opposite directions when the sliding column 4 is rotating.

[0032] After the folding pad 2 is moved, the rotating rod 9 drives the rotating ring 8 to rotate in the opposite direction, causing the sliding column 4 to retract into the cylindrical groove 3, and the sliding wheel 5 to detach from the ground, and once again play a supporting role through the cylindrical groove 3.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sofa bed hidden pulley moving device, comprising a sofa frame (1), a folding cushion (2) is slidingly installed on the inner side of the sofa frame (1), characterized in that: Also includes: The pulley concealment adjustment assembly includes a sliding column (4), and the lower end of the folding pad (2) is equipped with a downward-opening cylindrical groove (3). The sliding column (4) is installed inside the cylindrical groove (3). The outer end face of the upper end of the sliding column (4) and the inner end face of the cylindrical groove (3) are both provided with mutually cooperating threaded grooves (6). The outer end face of the lower end of the sliding column (4) is provided with multiple sets of toothed grooves (7). A rotating ring (8) is rotatably sleeved on the outer periphery of the cylindrical groove (3). A rotating rod (9) is rotatably installed on one end of the rotating ring (8). A second insert tooth (11) is integrally formed on one end of the rotating rod (9). The second insert tooth (11) can be inserted into the interior of the toothed groove (7). A sliding wheel (5) is rotatably installed on the lower end of the sliding column (4).

2. A sofa bed hidden pulley moving device according to claim 1, characterized in that: The outer wall of the cylindrical groove (3) is provided with a limiting groove (12), and the rotating rod (9) can be housed inside the limiting groove (12).

3. The sofa bed concealed caster moving device according to claim 2, characterized in that: One end of the rotating rod (9) is integrally formed with a first insert tooth (10), which can pass through the limiting groove (12) and engage with the tooth groove (7).

4. The sofa bed concealed caster moving device according to claim 1, characterized in that: The outer end face of the cylindrical groove (3) is provided with a rotating groove, and the rotating ring (8) rotates inside the rotating groove to increase the stability of the rotating ring (8).

5. The sofa bed hidden pulley moving device according to claim 1, wherein: The sliding wheel (5) includes two sets of rollers.

6. The sofa bed hidden pulley moving device according to claim 1, wherein: The outer end of the second insert (11) is nested with a ball, which rolls into contact with the surface of the tooth groove (7) to reduce friction.

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