A functional sofa frame with adjustable sitting depth

Abstract

The utility model relates to sofa frame technical field, concretely is a kind of adjustable function sofa frame of sitting depth, including straight pipe and moving frame, the straight pipe is set to two, two the straight pipe front and back two sides terminal between respectively connected with flat pipe and bottom cross pipe, the upper portion of straight pipe is equipped with U-shaped frame, the inside of U-shaped frame is equipped with guide rail, the lower portion of guide rail is equipped with second pulley.This kind of adjustable function sofa frame of sitting depth, the telescopic of electric telescopic link can drive moving frame relative straight pipe and back frame to move, to adjust the length that moving frame front portion extends out flat pipe, adjust the overall sitting depth of sofa frame, and in the adjustment process, first pulley and second pulley always provide stable support in the lower portion of moving frame, avoid the problem such as adjustment difficulty caused by moving frame gravity, reduce the abrasion between moving frame and U-shaped frame simultaneously, prolong the service life of sofa.

Description

Technical Field

[0001] This utility model relates to the field of sofa frame technology, specifically a functional sofa frame with adjustable seat depth. Background Technology

[0002] The sofa frame is an important internal support structure of the sofa, and its stability directly determines the overall quality of the sofa. The seat depth of a sofa refers to the distance from the front edge of the seat cushion to the backrest. A suitable seat depth allows the user's back to be fully supported, while the legs can also be comfortably stretched. If the seat depth is too shallow, the legs will dangle, and if the seat depth is too deep, the lower back may dangle.

[0003] At present, we can only try out and select different sofas when purchasing them, but we cannot adjust the seat depth of the sofa according to the needs of different family usage scenarios.

[0004] To address the aforementioned issues, we have made improvements by proposing a functional sofa frame with adjustable seat depth. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model provides a functional sofa frame with adjustable seat depth, including straight tubes and a movable frame. The straight tubes are configured as two tubes, and flat tubes and bottom horizontal tubes are respectively connected between the front and rear ends of the two straight tubes. A U-shaped frame is installed on the upper part of the straight tubes, and a guide rail is provided inside the U-shaped frame. A second pulley is provided at the lower part of the guide rail.

[0007] The movable frame is configured with two lower connecting rods and two upper connecting rods. The outer sides of the two lower connecting rods are provided with first pulleys. A lower horizontal tube is installed between the two lower connecting rods on the side near the bottom horizontal tube. The front and rear ends of the two upper connecting rods are respectively connected to the upper horizontal tube and the connecting tube. The lower horizontal tube and the upper horizontal tube are installed in an alternating manner.

[0008] As a preferred embodiment of this utility model, the two ends of the guide rail are welded to the inner surfaces of the two sides of the U-shaped frame, the first pulley is rotatably connected to the lower connecting rod, the bottom of the first pulley is engaged with the upper surface of the guide rail, a support plate is bolted to the inner surface of the straight tube, the second pulley is rotatably connected to the top of the support plate, the upper part of the second pulley is engaged with the bottom of the lower connecting rod, and a stabilizing component is welded between the bottom of the guide rail and the straight tube.

[0009] As a preferred embodiment of this utility model, the two ends of the flat tube are respectively connected to the ends of the two straight tubes on the same side by bolts. A mounting bracket is installed on the middle of the upper surface of the flat tube by bolts. An electric telescopic rod is installed on the upper part of the mounting bracket. The telescopic part of the electric telescopic rod is connected to the lower horizontal tube.

[0010] As a preferred technical solution of this utility model, a plurality of vertical tubes are welded between the lower connecting rod and the upper connecting rod on the same side. The two ends of the upper horizontal tube are respectively welded to the front ends of the two upper connecting rods. The lower horizontal tube is located behind the upper horizontal tube, and the two ends of the lower horizontal tube are respectively welded to the two lower connecting rods.

[0011] As a preferred technical solution of this utility model, the lower front ends of the two lower connecting rods are respectively welded with bottom support tubes, and the bottom of the bottom support tubes are rotatably mounted with movable wheels, and the movable wheels are equipped with buckles.

[0012] As a preferred embodiment of this utility model, the lower parts of the front and rear ends of the two straight tubes are respectively welded with support feet.

[0013] As a preferred embodiment of this utility model, vertical back frames are welded to the upper part of the rear ends of the two straight tubes respectively, and the top of the two back frames are connected to forward-protruding extension frames.

[0014] The beneficial effects of this utility model are:

[0015] 1. This type of adjustable seat depth sofa frame can move the movable frame relative to the straight tube and back frame by extending and retracting the electric telescopic rod, thereby adjusting the length of the flat tube extending from the front of the movable frame and adjusting the overall seat depth of the sofa frame. During this adjustment process, the first and second pulleys always provide stable support under the movable frame, avoiding problems such as adjustment difficulties caused by the weight of the movable frame, while reducing wear between the movable frame and the U-shaped frame and extending the service life of the sofa.

[0016] 2. The upper horizontal tube is located in front of the lower horizontal tube. During use, the upper horizontal tube provides effective support for the front of the sofa frame, preventing damage to the rear electric telescopic rod from human pressure and edge collisions. At the same time, because the upper horizontal tube is higher than the lower horizontal tube, it can better provide leg support for the user, improving the comfort of use. In addition, the extension frame at the top of the sofa frame protrudes forward, which can provide neck support for the user, making the sofa frame more ergonomic. Attached Figure Description

[0017] 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:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the lower structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the movable frame structure of this utility model;

[0021] Figure 4 This is a partially enlarged structural diagram of the first and second pulleys of this utility model;

[0022] In the diagram: 1. Straight tube; 2. Back frame; 3. Moving frame; 301. Lower connecting rod; 302. Upper connecting rod; 4. U-shaped frame; 5. Guide rail; 6. First pulley; 7. Support plate; 8. Second pulley; 9. Bottom support tube; 10. Support foot; 11. Moving wheel; 12. Electric telescopic rod; 13. Mounting frame; 14. Flat tube; 15. Lower horizontal tube; 16. Stabilizer; 17. Vertical tube; 18. Upper horizontal tube; 19. Extension frame; 20. Bottom horizontal tube; 21. Connecting tube. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] Example: Figure 1-4 As shown, a functional sofa frame with adjustable seat depth includes a straight tube 1 and a movable frame 3. The straight tube 1 is configured as two tubes, and a flat tube 14 and a bottom horizontal tube 20 are respectively connected between the front and rear ends of the two straight tubes 1. A U-shaped frame 4 is installed on the upper part of the straight tube 1. A guide rail 5 is provided inside the U-shaped frame 4, and a second pulley 8 is provided at the lower part of the guide rail 5.

[0025] The movable frame 3 is configured with two lower connecting rods 301 and two upper connecting rods 302. The outer side of the two lower connecting rods 301 is provided with a first pulley 6. A lower horizontal tube 15 is installed between the two lower connecting rods 301 on the side near the bottom horizontal tube 20. The front and rear ends of the two upper connecting rods 302 are respectively connected to the upper horizontal tube 18 and the connecting tube 21. The lower horizontal tube 15 and the upper horizontal tube 18 are installed alternately in front and behind.

[0026] The two ends of the guide rail 5 are welded to the inner surfaces of the two sides of the U-shaped frame 4 respectively. The first pulley 6 is rotatably connected to the lower connecting rod 301. The bottom of the first pulley 6 is snapped into the upper surface of the guide rail 5. The inner surface of the straight tube 1 is connected to the support plate 7 by bolts. The second pulley 8 is rotatably connected to the top of the support plate 7. The upper part of the second pulley 8 is snapped into the bottom of the lower connecting rod 301. A stabilizing component 16 is welded between the bottom of the guide rail 5 and the straight tube 1.

[0027] When the movable frame 3 moves forward, the first pulley 6 rolls forward along the guide rail 5, and the second pulley 8 rotates in place as the movable frame 3 moves. The first pulley 6 and the second pulley 8 together provide support for the lower part of the movable frame 3, reduce the resistance during the movement of the movable frame 3, and improve the stability of the movable frame 3. At this time, the seat depth of the sofa frame increases.

[0028] Similarly, when the movable frame 3 moves backward, the first pulley 6 rolls backward along the guide rail 5, and the second pulley 8 rotates in place as the movable frame 3 moves, at which point the seat depth of the sofa frame decreases.

[0029] The two ends of the flat tube 14 are respectively connected to the ends of the two straight tubes 1 on the same side by bolts. A mounting bracket 13 is installed on the middle of the upper surface of the flat tube 14 by bolts. An electric telescopic rod 12 is installed on the upper part of the mounting bracket 13. The telescopic part of the electric telescopic rod 12 is connected to the lower horizontal tube 15. When the telescopic part of the electric telescopic rod 12 extends, it pushes the entire moving frame 3 forward. When the telescopic part of the electric telescopic rod 12 shortens, it pulls the entire moving frame 3 backward. At this time, the moving wheel 11 provides support for the front end of the extended part of the moving frame 3 to prevent the overall center of gravity of the sofa frame from shifting.

[0030] Several vertical tubes 17 are welded between the lower connecting rod 301 and the upper connecting rod 302 on the same side. The two ends of the upper horizontal tube 18 are welded to the front ends of the two upper connecting rods 302 respectively. The lower horizontal tube 15 is located behind the upper horizontal tube 18, and the two ends of the lower horizontal tube 15 are welded to the two lower connecting rods 301 respectively. During the use of this sofa frame, the upper horizontal tube 18 is always located at the front of the sofa. After adjusting the seat depth of the sofa frame according to the user's needs, the upper horizontal tube 18 is located behind the user's knees when the user sits down, which can provide more stable support for the user's legs. At the same time, the obstruction of the upper horizontal tube 18 can prevent the user's weight from directly pressing on the electric telescopic rod 12 and causing damage to the electric telescopic rod 12.

[0031] The lower front ends of the two lower connecting rods 301 are respectively welded with bottom support tubes 9. The bottom of the bottom support tubes 9 is rotatably mounted with a movable wheel 11. The movable wheel 11 is equipped with a lock. After the seat depth is adjusted, the lock can prevent the movable wheel 11 from moving during use.

[0032] Support legs 10 are welded to the lower parts of the front and rear ends of the two straight pipes 1 respectively.

[0033] Vertical back frames 2 are welded to the upper part of the rear ends of the two straight tubes 1 respectively. The top of the two back frames 2 is connected to a forward-protruding extension frame 19. When the user leans back, the end of the extension frame 19 can provide support for the user's neck, improving the user's comfort.

[0034] Working principle: When this type of adjustable seat depth sofa frame is in use, the extension part of the electric telescopic rod 12 extends and pushes the entire movable frame 3 forward. When the movable frame 3 moves forward, the first pulley 6 rolls forward along the guide rail 5, and the second pulley 8 rotates in place as the movable frame 3 moves. The first pulley 6 and the second pulley 8 together provide support for the lower part of the movable frame 3, reducing the resistance during the movement of the movable frame 3 and improving the stability of the movable frame 3. At this time, the seat depth of the sofa frame increases, and the movable wheel 11 provides support for the front end of the extended movable frame 3, preventing the overall center of gravity of the sofa frame from shifting.

[0035] Similarly, when the telescopic part of the electric telescopic rod 12 is shortened, the entire movable frame 3 is pulled backward. When the movable frame 3 moves backward, the first pulley 6 rolls backward along the guide rail 5, and the second pulley 8 rotates in place as the movable frame 3 moves. At this time, the seat depth of the sofa frame is reduced.

[0036] During use, the upper horizontal tube 18 is always located at the front of the sofa. After adjusting the seat depth of the sofa according to the user's needs, the upper horizontal tube 18 is located behind the user's knees when the user sits down, which can provide more stable support for the user's legs. At the same time, the obstruction of the upper horizontal tube 18 can prevent the user's weight from directly pressing on the electric telescopic rod 12 and causing damage to the electric telescopic rod 12. The top of the two back frames 2 is connected to the forward-protruding extension frame 19. When the user leans back, the end of the extension frame 19 can provide support for the user's neck, improving the user's comfort.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A functional sofa frame with adjustable seat depth, comprising a straight tube (1) and a movable frame (3), characterized in that, The straight pipe (1) is configured as two pipes, and a flat pipe (14) and a bottom horizontal pipe (20) are respectively connected between the front and rear ends of the two straight pipes (1). A U-shaped frame (4) is installed on the upper part of the straight pipe (1), and a guide rail (5) is provided inside the U-shaped frame (4). A second pulley (8) is provided at the lower part of the guide rail (5). The movable frame (3) is configured with two lower connecting rods (301) and two upper connecting rods (302). The outer sides of the two lower connecting rods (301) are provided with first pulleys (6). A lower horizontal tube (15) is installed between the two lower connecting rods (301) on the side near the bottom horizontal tube (20). The front and rear ends of the two upper connecting rods (302) are respectively connected to the upper horizontal tube (18) and the connecting tube (21). The lower horizontal tube (15) and the upper horizontal tube (18) are installed alternately in front and behind.

2. The adjustable seat depth functional sofa frame according to claim 1, characterized in that, The two ends of the guide rail (5) are welded to the inner surfaces of the two sides of the U-shaped frame (4), the first pulley (6) is rotatably connected to the lower connecting rod (301), the bottom of the first pulley (6) is engaged with the upper surface of the guide rail (5), the inner surface of the straight tube (1) is connected to the support plate (7) by bolts, the second pulley (8) is rotatably connected to the top of the support plate (7), the upper part of the second pulley (8) is engaged with the bottom of the lower connecting rod (301), and a stabilizing component (16) is welded between the bottom of the guide rail (5) and the straight tube (1).

3. A functional sofa frame with adjustable seat depth according to claim 1, characterized in that, The two ends of the flat tube (14) are respectively connected to the ends of the two straight tubes (1) on the same side by bolts. A mounting bracket (13) is installed on the middle of the upper surface of the flat tube (14) by bolts. An electric telescopic rod (12) is installed on the upper part of the mounting bracket (13). The telescopic part of the electric telescopic rod (12) is connected to the lower horizontal tube (15).

4. A functional sofa frame with adjustable seat depth according to claim 1, characterized in that, Several vertical tubes (17) are welded between the lower connecting rod (301) and the upper connecting rod (302) on the same side. The two ends of the upper horizontal tube (18) are respectively welded to the front ends of the two upper connecting rods (302). The lower horizontal tube (15) is located behind the upper horizontal tube (18), and the two ends of the lower horizontal tube (15) are respectively welded to the two lower connecting rods (301).

5. A functional sofa frame with adjustable seat depth according to claim 1, characterized in that, The lower front ends of the two lower connecting rods (301) are respectively welded with bottom support tubes (9), and the bottom of the bottom support tubes (9) is rotatably mounted with a movable wheel (11), and a lock is installed on the movable wheel (11).

6. A functional sofa frame with adjustable seat depth according to claim 1, characterized in that, Support feet (10) are welded to the lower parts of the front and rear ends of the two straight pipes (1).

7. A functional sofa frame with adjustable seat depth according to claim 1, characterized in that, Vertical back frames (2) are welded to the upper part of the rear ends of the two straight tubes (1), and the top of the two back frames (2) is connected to a forward-protruding extension frame (19).

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