Hardness adjusting structure of sofa

Abstract

The utility model relates to a hardness adjusting structure of a sofa, and relates to the technical field of furniture, the hardness adjusting structure comprises a sofa frame and a cushion frame, the cushion frame is arranged above the sofa frame, a plurality of cushion springs are arranged in the middle of the cushion frame, the cushion frame comprises two symmetrically arranged side supports, one end between the two side supports is fixedly connected with a cross beam, and the other end between the two side supports is fixedly connected with the cross beam. A plurality of cushion springs are arranged between the two side supports in an arch shape, the two ends of each cushion spring are connected with the cross beam and the rotating shaft respectively, and the rotating shaft stretches or compresses the cushion springs through rotation. The sofa has the advantages that the hardness of the cushion of the sofa is adjusted, the comfort of the sofa is improved, and the functionality of the sofa is expanded.

Description

Technical Field

[0001] The present application relates to the technical field of furniture, and in particular to a hardness adjustment structure of a sofa. Background Art

[0002] A sofa is a cushioned multi-seat chair. A sofa is a backrest chair equipped with springs or thick foam plastics, etc., with armrests on both sides, and is a type of soft furniture.

[0003] The sofa is an indispensable piece of furniture in the living room. There are many different types of sofas. The softness and hardness of the seat cushions of different types of sofas are different. Different people have different requirements for the softness and hardness of the sofa. Therefore, there is an urgent need for a sofa that can adjust the softness and hardness of the seat cushions.

[0004] A sofa is generally provided with a cushion spring for support. Existing sofas capable of adjusting hardness generally have a movable structure that can be translated inside the sofa. The tension inside the cushion spring in the sofa is adjusted by the translation of the movable structure, thereby adjusting the hardness of the cushion. However, the movable structure may cause a large change in the height of the cushion spring during the movement and adjustment process, thereby changing the height of the sofa cushion and affecting the comfort of the sofa. Utility Model Content

[0005] In order to solve the problem in the prior art that the height of the sofa cushion changes greatly during adjustment in the hardness adjustment structure of the existing sofa, thus affecting the comfort of the sofa, the present application provides a sofa hardness adjustment structure.

[0006] The hardness adjustment structure of a sofa provided in the present application adopts the following technical scheme: a hardness adjustment structure of a sofa comprises a cushion frame, a plurality of cushion springs are arranged in the middle of the cushion frame, the cushion frame comprises two symmetrically arranged side brackets, a cross beam and a connecting plate are connected between the two side brackets, the connecting plate is rotatably connected to the side brackets through a rotating shaft, the cushion spring is arranged in an arch shape between the two side brackets, and the two ends of the cushion spring are respectively connected to the cross beam and the connecting plate, when the connecting plate rotates around the rotating shaft in a direction away from the cross beam, the connecting plate drives the cushion spring to move upward and stretches the cushion spring, and when the connecting plate rotates around the rotating shaft in a direction close to the cross beam, the connecting plate drives the cushion spring to move downward and compresses the cushion spring.

[0007] By adopting the above technical scheme, when the rotating shaft rotates in a direction away from the cross beam, the rotating shaft drives the connecting plate to stretch the cushion spring. At the same time, since the connection between the connecting plate and the cushion spring makes an arc motion, the connecting plate lifts one end of the cushion spring upward, so that the cushion spring is stretched while the height remains unchanged, the tension inside the cushion spring becomes larger, the supporting performance is improved, and the hardness of the sofa increases; when the rotating shaft rotates in a direction close to the cross beam, the rotating shaft drives the connecting plate to compress the cushion spring. At the same time, since the connection between the connecting plate and the cushion spring makes an arc motion, the connecting plate presses one end of the cushion spring downward, so that the cushion spring is compressed while the height remains unchanged, the tension inside the cushion spring becomes smaller, the supporting performance is reduced, and the hardness of the sofa is reduced.

[0008] Optionally, the connecting plate extends upward from the rotating shaft, and a connection point between the connecting plate and the cushion spring is located above a reference plane where the rotating shaft and the crossbeam are located.

[0009] Optionally, the connecting plate extends below the rotating shaft, and the connection between the connecting plate and the cushion spring is located below a reference plane where the rotating shaft and the crossbeam are located.

[0010] Optionally, an adjustment drive assembly for driving the rotating shaft to rotate is provided at one end of the rotating shaft.

[0011] By adopting the above technical solution, the operator can adjust the rotation of the rotating shaft by adjusting the driving component to achieve rapid adjustment of the hardness of the sofa.

[0012] Optionally, an adjustment component is connected between the rotating shaft and the adjustment drive component, and the adjustment component includes a sector-shaped tooth fixedly connected to the rotating shaft, and a mounting plate extends downward from the side bracket close to the sector-shaped tooth, and a gear is rotatably arranged on the mounting plate, and the gear is meshed with the sector-shaped tooth, and the adjustment drive component is connected to the gear transmission.

[0013] By adopting the above technical solution, the driving gear rotates when the hardness is adjusted, and the gear drives the rotating shaft to rotate clockwise or counterclockwise through the sector teeth to achieve the stretching or compression of the seat cushion spring.

[0014] Optionally, the adjustment drive component is configured as at least one of a manual drive component and an electric drive component.

[0015] Optionally, the manual drive assembly includes an adjustment handle disposed on one side outside the cushion frame, and the adjustment handle is connected to the rotating shaft.

[0016] By adopting the above technical solution, during manual adjustment, the operator turns the adjustment handle upward or downward, and the adjustment handle drives the rotating shaft to rotate for adjustment.

[0017] Optionally, the adjustment drive assembly adopts an electric drive assembly, and the electric drive assembly includes an adjustment motor arranged on the outside of the side bracket, and a transmission is connected to the output shaft of the adjustment motor, and the transmission is connected to the rotating shaft.

[0018] By adopting the above technical solution, during electric adjustment, the adjustment motor drives the shaft to rotate through the transmission for adjustment.

[0019] Optionally, a torsion spring is passed through the interior of the rotating shaft, one end of the torsion spring is fixedly connected to the rotating shaft, and the other end extends to the outside of the rotating shaft and is fixedly connected to the side bracket.

[0020] By adopting the above technical solution, when the cushion spring is arranged between the rotating shaft and the cross beam, it will exert an elastic force on the rotating shaft to drive the rotating shaft to rotate. By setting the torsion spring, the elastic force of the torsion spring is used to offset the elastic force exerted by the cushion spring on the rotating shaft, so as to facilitate the adjustment mechanism to drive the rotating shaft to rotate, thereby improving the overall stability.

[0021] Optionally, a sofa frame is also included, and two sides of the bottom of the cushion frame are connected to the sofa frame via sliding rails.

[0022] By adopting the above technical solution, the cushion frame reciprocates above the sofa frame through the slide rail, thereby realizing the position adjustment of the cushion and expanding the functionality of the sofa.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. In the present application, a rotating shaft is arranged in the seat cushion frame, and the seat cushion spring is arranged in an arch shape inside the seat cushion frame and one end is connected to the rotating shaft. The seat cushion spring is stretched and compressed by the rotation of the rotating shaft, so that the arch curvature and internal tension of the seat cushion spring can be adjusted, and the hardness of the sofa cushion can be adjusted effectively, thereby improving the comfort of the sofa and expanding the functionality of the sofa. The overall structure is simple and easy to use.

[0025] 2. In the present application, an upwardly extending connecting plate is arranged on the rotating shaft, and the rotating shaft is connected to the cushion spring through the connecting plate. The connection between the cushion spring and the connecting plate is bent downward in a Z shape, so that the cushion spring is driven to move along an arc when the rotating shaft rotates. The vertical height of the cushion spring is also compensated accordingly when it is stretched or compressed, thereby ensuring that the height of the cushion spring remains unchanged after adjustment, avoiding the situation where the height of the cushion changes too much during the hardness adjustment of the sofa, and improving the comfort of the sofa. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a sofa hardness adjustment structure in an embodiment of the present application.

[0027] Figure 2It is a schematic diagram of a top view of a hardness adjustment structure of a sofa in an embodiment of the present application.

[0028] Figure 3 It is a left-side cross-sectional structural schematic diagram of a hardness adjustment structure of a sofa in an embodiment of the present application.

[0029] Figure 4 It is a partially enlarged schematic diagram of a hardness adjustment structure of a sofa in Example 1 of the present application.

[0030] Figure 5 It is a partially enlarged schematic diagram of a hardness adjustment structure of a sofa in Example 2 of the present application.

[0031] Explanation of the accompanying drawings: 1. Sofa frame; 2. Cushion frame; 21. Side bracket; 22. Crossbeam; 23. Rotating shaft; 24. Cushion spring; 25. Connecting rod; 26. Fastener; 27. Connecting plate; 28. Adjusting drive assembly; 281. Manual driving assembly; 2811. Adjusting rotating shaft; 2812. Adjusting handle; 282. Electric driving assembly; 2821. Transmission; 2822. Adjusting motor; 29. ​​Adjusting assembly; 291. Fan-shaped teeth; 292. Arc groove; 293. Fixing cover; 294. Gear; 295. Limiting rod; 210. Mounting plate; 211. Torsion spring; 3. Slide rail. DETAILED DESCRIPTION

[0032] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0033] See also Figure 1-5 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of this application, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical content disclosed in this application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this application. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this application without substantially changing the technical content.

[0034] The following is combined with Figure 1-5 This application is described in further detail.

[0035] Embodiment 1:

[0036] This embodiment discloses a hardness adjustment structure of a sofa.

[0037] Reference Figure 1 A sofa hardness adjustment structure comprises a sofa frame 1 formed by assembling profiles, slide rails 3 are arranged above the two opposite sides of the sofa frame 1, a cushion frame 2 is arranged above the sofa frame 1, the cushion frame 2 is slidably connected to the slide rails 3, and the cushion frame 2 can freely reciprocate along the slide rails 3 to adjust the position of the cushion frame 2.

[0038] Reference Figure 2 and Figure 3 The seat frame 2 includes two symmetrically arranged side brackets 21, one end of the two side brackets 21 is fixedly connected by a cross beam 22, and a rotating shaft 23 is rotatably connected between the other ends of the two side brackets 21. Five seat springs 24 are arranged between the cross beam 22 and the rotating shaft 23. The five seat springs 24 are all bent in an arch shape. The seat springs 24 adopt serpentine springs. The five seat springs 24 are arranged parallel to the side brackets 21. A hook-shaped fastener 26 is arranged on the cross beam 22. An upwardly extending connecting plate 27 is connected above the rotating shaft 23. The upper end of the connecting plate 27 is also bent to form a hook-shaped portion. The two ends of the seat spring 24 are respectively connected to the fastener 26 and the connecting plate 27. The end of the seat spring 24 connected to the connecting plate 27 is bent downward to form a Z shape, and the seat spring 24 is connected to the rotating shaft through the connecting plate 27 and the Z-shaped end. The height of one end connected to the shaft 23 is increased. When the shaft 23 rotates, the end of the cushion spring 24 connected to the shaft 23 moves along an arc, so that the cushion spring 24 moves in the horizontal direction to stretch and compress. At the same time, a certain height is adjusted in the vertical direction to compensate for the change in height of the cushion spring 24 during the stretching or compression process, thereby ensuring that the height of the adjusted cushion spring 24 remains unchanged and reducing the amplitude of the change in the seat height during the hardness adjustment process. The five cushion springs 24 are connected in the middle by two connecting rods 25. The connecting rods 25 connect the five cushion springs 24 in the width direction so that the five cushion springs 24 form a whole, thereby improving the supporting performance of the cushion spring 24. An adjustment component 29 is connected to one end of the shaft 23, and an adjustment drive component 28 connected to the adjustment component 29 is arranged on the outer side of the cushion frame 2.

[0039] Reference Figure 3 and Figure 4A torsion spring 211 is provided inside the rotating shaft 23, one end of the torsion spring 211 is fixedly connected to the inner wall of the rotating shaft 23, and the other end of the torsion spring 211 extends to the outside of the rotating shaft 23. A mounting plate 210 is extended downwardly from the lower side bracket 21, and the other end of the torsion spring 211 is fixedly connected to the mounting plate 210. When the cushion spring 24 is installed inside the cushion frame 2, it will exert an elastic force on the rotating shaft 23 to drive the rotating shaft 23 to rotate. The torsion spring 211 is provided to exert a reverse elastic force on the rotating shaft 23 through the torsion spring 211, so that the force in the rotating shaft 23 is balanced, and the stability of the rotating shaft 23 is maintained. When adjusting, there is no need to resist the elastic force exerted by the cushion spring 24 on the rotating shaft, which is convenient for adjusting the rotating shaft 23.

[0040] One end of the rotating shaft 23 connected to the mounting plate 210 is connected with a sector tooth 291, and an arc groove 292 is opened in the middle of the sector tooth 291. A gear 294 meshing with the sector tooth 291 is rotatably set on the mounting plate 210. A fixing cover 293 is provided on the outer side of the gear 294. The fixing cover 293 is fixedly connected to the mounting plate 210. A limiting rod 295 is provided at one end of the fixing cover 293. The limiting rod 295 passes through the arc groove 292. The adjustment drive assembly 28 is transmission-connected with the gear 294. The adjustment drive assembly 28 drives the gear 294 to rotate. The gear 294 rotates and drives the rotating shaft 23 to rotate through the sector tooth 291 to adjust the cushion spring 24. When the sector tooth 291 rotates, the arc groove 292 moves along the limiting rod 295. The limiting rod 295 limits the movement of the sector tooth 291 to prevent the sector tooth 291 from excessive movement and disengagement from the gear 294.

[0041] Reference Figure 4 The adjustment drive assembly 28 adopts a manual drive assembly 281 , and the manual drive assembly 281 includes an adjustment handle 2812 arranged on one side of the cushion frame 2 , and the adjustment handle 2812 is connected to the gear 294 through the adjustment shaft 2811 .

[0042] The implementation principle of the hardness adjustment structure of a sofa in this embodiment is:

[0043] Reference Figure 3When adjusting the hardness of the sofa, the user rotates the adjustment handle 2812 upwards, and the adjustment handle 2812 drives the gear 294 to rotate counterclockwise, and the gear 294 starts the sector tooth 291 to rotate clockwise, and the sector tooth 291 drives the rotating shaft 23 to rotate clockwise, and the rotating shaft 23 drives one end of the cushion spring 24 to move along the arc toward the side of the cross beam 22 through the connecting plate 27. The tension inside the cushion spring 24 is compressed and becomes smaller, the arch curvature of the cushion spring 24 becomes smaller, and the arch height of the cushion spring 24 becomes higher. However, at the same time, the connecting plate 27 drives one end of the cushion spring 24 to move downward to compensate for the height of the cushion spring 24, and the overall height of the cushion spring 24 remains unchanged. Since the tension inside the cushion spring 24 becomes smaller, the cushion spring 24 becomes softer, and the hardness of the sofa is increased. The hardness decreases. On the contrary, when the adjustment handle 2812 is rotated downward, the adjustment handle drives the gear 294 to rotate clockwise, and the gear 294 starts the sector tooth 291 to rotate counterclockwise, and the sector tooth 291 drives the rotating shaft 23 to rotate counterclockwise. The rotating shaft 23 drives one end of the cushion spring 24 to move along the arc to the side away from the cross beam 22 through the connecting plate 27. The tension inside the cushion spring 24 increases, the arch curvature of the cushion spring 24 increases, and the arch height of the cushion spring 24 decreases. However, at the same time, the connecting plate 27 drives one end of the cushion spring 24 to move upward to compensate for the height of the cushion spring 24. The overall height of the cushion spring 24 remains unchanged. Due to the increase in the tension inside the cushion spring 24, the cushion spring 24 becomes harder, and the hardness of the sofa increases.

[0044] Embodiment 2:

[0045] The difference between this embodiment and the first embodiment is that the adjustment drive assembly 28 in this embodiment adopts an electric drive assembly 282, and the electric drive assembly 282 includes an adjustment motor 2822 arranged on one side of the side bracket 21, and the output shaft of the adjustment motor 2822 is connected to the transmission 2821, and the output shaft of the transmission 2821 is connected to the gear 294. When adjusting, the adjustment motor 2822 is started, and the adjustment motor 2822 drives the gear 294 to rotate through the transmission 2821 to adjust the rotation of the rotating shaft 23.

[0046] Embodiment three:

[0047] In this embodiment, on the basis of the first or second embodiment, the connecting plate 27 is arranged to extend downward, and the lower end of the connecting plate 27 is bent in the direction away from the cross beam 22 to form a hook-shaped portion. The connection between the connecting plate 27 and the seat spring 24 is located below the reference plane where the rotating shaft 23 and the cross beam 22 are located. The structures of the connecting plate 27 and the rotating shaft 23 are adjusted accordingly to avoid interfering with the movement of the seat spring 24. For example, avoidance grooves are set on the connecting plate 27 and the rotating shaft 23 to ensure free adjustment of the seat spring 24.

[0048] In summary, in the present application, a rotating shaft is arranged in the cushion frame, and the cushion spring is arranged in an arch shape inside the cushion frame and one end is connected to the rotating shaft. The cushion spring is stretched and compressed by the rotation of the rotating shaft, so that the arch curvature and internal tension of the cushion spring can be adjusted, and the hardness of the sofa cushion can be adjusted effectively, thereby improving the comfort of the sofa and expanding the functionality of the sofa. The overall structure is simple and easy to use. In the present application, an upwardly extending connecting plate is arranged on the rotating shaft, and the rotating shaft is connected to the cushion spring through the connecting plate. The connection between the cushion spring and the connecting plate is bent downward in a Z shape, so that when the rotating shaft rotates, the cushion spring is driven to move along the arc. When the cushion spring is stretched or compressed, the vertical height is also compensated accordingly, ensuring that the height of the cushion spring remains unchanged after adjustment, avoiding the situation where the height of the cushion changes too much during the adjustment of the sofa hardness, and improving the comfort of the sofa. Therefore, the present application effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0049] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present application shall still be included in the protection scope of the present application.

Claims

1. A sofa hardness adjustment structure, comprising a cushion frame (2), wherein a plurality of cushion springs (24) are arranged in the middle of the cushion frame (2), characterized in that: The seat cushion frame (2) comprises two symmetrically arranged side brackets (21), a cross beam (22) and a connecting plate (27) being connected between the two side brackets (21), the connecting plate (27) being rotatably connected to the side brackets (21) via a rotating shaft (23), the seat cushion spring (24) being arranged between the two side brackets (21) in an arched shape, the two ends of the seat cushion spring (24) being respectively connected to the cross beam (22) and the connecting plate (27), when the connecting plate (27) rotates around the rotating shaft (23) in a direction away from the cross beam (22), the connecting plate (27) drives the seat cushion spring (24) to move upward and stretch the seat cushion spring (24), and when the connecting plate (27) rotates around the rotating shaft (23) in a direction close to the cross beam (22), the connecting plate (27) drives the seat cushion spring (24) to move downward and compress the seat cushion spring (24).

2. The hardness adjustment structure of a sofa according to claim 1, characterized in that: The connecting plate (27) extends upwardly from the rotating shaft (23), and the connection point between the connecting plate (27) and the cushion spring (24) is located above a reference plane where the rotating shaft (23) and the crossbeam (22) are located.

3. The hardness adjustment structure of a sofa according to claim 1, characterized in that: The connecting plate (27) extends below the rotating shaft (23), and the connection point between the connecting plate (27) and the cushion spring (24) is located below the reference plane where the rotating shaft (23) and the crossbeam (22) are located.

4. The sofa hardness adjustment structure according to claim 1, characterized in that: An adjustment drive assembly (28) for driving the rotating shaft (23) to rotate is provided at one end of the rotating shaft (23).

5. The sofa hardness adjustment structure according to claim 4, characterized in that: An adjustment assembly (29) is connected between the rotating shaft (23) and the adjustment drive assembly (28), the adjustment assembly (29) comprising a sector tooth (291) fixedly connected to the rotating shaft (23), a mounting plate (210) extending downwardly from the side bracket (21) close to the sector tooth (291), a gear (294) rotatably provided on the mounting plate (210), the gear (294) meshing with the sector tooth (291), and the adjustment drive assembly (28) is transmission-connected to the gear (294).

6. The hardness adjustment structure of a sofa according to claim 4 or 5, characterized in that: The adjustment drive component (28) is configured as at least one of a manual drive component (281) and an electric drive component (282).

7. The sofa hardness adjustment structure according to claim 6, characterized in that: The manual drive assembly (281) comprises an adjustment handle (2812) arranged on one side of the outside of the cushion frame (2), and the adjustment handle (2812) is connected to the rotating shaft (23).

8. The sofa hardness adjustment structure according to claim 6, characterized in that: The electric drive assembly (282) comprises an adjustment motor (2822) arranged outside the side bracket (21); a transmission (2821) is connected to the output shaft of the adjustment motor (2822); and the transmission (2821) is connected to the rotating shaft (23).

9. The sofa hardness adjustment structure according to claim 1, characterized in that: A torsion spring (211) is inserted into the interior of the rotating shaft (23); one end of the torsion spring (211) is fixedly connected to the rotating shaft (23), and the other end extends to the outside of the rotating shaft (23) and is fixedly connected to the side bracket (21).

10. The sofa hardness adjustment structure according to claim 1, characterized in that: It also comprises a sofa frame (1), and two sides of the bottom of the cushion frame (2) are connected to the sofa frame (1) via slide rails (3).

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