A sofa chair

Abstract

The sofa chair comprises a cushion, a support plate and a first component, the first component is arranged on the support plate, the first component moves along a first direction, a first through hole is arranged in the first component, and the support plate passes through the first through hole; a backrest is fixedly installed on the first component; a clamping mechanism is arranged between the first component and the support plate, the clamping mechanism comprises a first rack arranged on the first component, a second rack arranged on the support plate and a spring arranged in the first component. The engagement of the first rack and the second rack limits the movement of the first component along the vertical direction, so that when no one leans on the backrest, the backrest can freely slide along the vertical direction, the user can accurately adjust the height according to the own demand, and no tool is needed; when someone leans on the backrest, the leaning force automatically triggers the clamping mechanism, the backrest is fixed and stable, there is no risk of displacement, and the operation is simple.

Description

Technical Field

[0001] This disclosure relates to the field of chairs, and more particularly to a sofa chair. Background Technology

[0002] As a widely used piece of furniture in daily life and public spaces, the comfort and adaptability of sofas and chairs directly affect the user experience. Ergonomic studies show that the height of the sofa backrest, especially the support height corresponding to the lumbar region, needs to be adapted to users of different heights and body types in order to effectively relieve lumbar pressure and avoid discomfort caused by prolonged sitting.

[0003] In existing technologies, the backrest height adjustment structure of sofa chairs mostly adopts a 'screw + buckle' combination method: the backrest and seat cushion support structure are fixed by screws, and the buckles have multiple preset adjustment positions. During adjustment, the screws must be loosened manually, the backrest moved vertically to the target position, and then the screws tightened to complete the fixation. This type of adjustment method has significant drawbacks: it is cumbersome to operate, requiring tools or manual screw tightening during the adjustment process, which involves many steps and is time-consuming. For people with mobility impairments or temporary use scenarios such as public places, the operation threshold is high; moreover, frequent screw tightening and buckle adjustment by a large number of people in public places can easily lead to component wear and tear, and it also cannot quickly adapt to the lumbar support needs of different users. Utility Model Content

[0004] This disclosure provides a sofa chair to at least solve the above-mentioned technical problems existing in the prior art.

[0005] According to a first aspect of this disclosure, a sofa chair is provided, comprising: A seat cushion designed to support the weight of a person; A support plate, which is fixedly disposed on the seat cushion along a first direction; A first component is disposed on the support plate, the first component moves along a first direction, and a first through hole is provided in the first component, through which the support plate passes; A backrest, which is fixedly mounted on the first component, is used to support the weight of a human body leaning against it. A locking mechanism is provided between the first component and the support plate. The locking mechanism includes a first rack on the first component, a second rack on the support plate, and a spring inside the first component. When no one is leaning against the backrest, the spring force causes the first rack and the second rack to separate, and the first component can slide freely along the vertical direction of the support plate. When someone is leaning against the backrest, the leaning force overcomes the spring force, causing the first rack and the second rack to lock together, and the first component is fixed relative to the support plate.

[0006] Furthermore, a first through hole is provided in the first component along a first direction, the support plate passes through the first through hole, and the first rack is located on the inner wall of the first through hole.

[0007] Furthermore, one end of the spring is fixedly installed on the inner wall of the first through hole, the other end of the spring abuts against the support plate, and the length direction of the spring is perpendicular to the first direction.

[0008] Furthermore, the snap-fit ​​mechanism also includes a second component, which is disposed on the side of the spring near the support plate. The side of the second component facing the support plate is provided with a plurality of first arc-shaped protrusions arranged along the first direction. The support plate is correspondingly provided with a plurality of second arc-shaped protrusions arranged along the first direction. When the first component is stationary relative to the support plate, the first arc-shaped protrusions abut against the second arc-shaped protrusions, and the first arc-shaped protrusions are embedded between two adjacent second arc-shaped protrusions.

[0009] Furthermore, the tooth profiles of the first rack and the second rack are matched, and the teeth of both the first rack and the second rack extend along the first direction. When the first rack and the second rack are engaged, the teeth mesh with each other to restrict the first component from sliding along the first direction of the support plate.

[0010] Furthermore, at least two springs are provided, and the at least two springs are respectively located on both sides of the first rack.

[0011] Furthermore, the first rack is integrally formed on the inner wall of the first through hole, and the second rack is integrally formed on the surface of the support plate facing the inner wall of the first through hole.

[0012] Furthermore, the support plate is vertically fixed to the rear edge of the seat cushion, and the length direction of the support plate is consistent with the first direction.

[0013] Furthermore, there are two support plates, one of which is located inside the first through hole and the other is located outside the first component. When the first rack and the second rack are engaged with each other, the outer wall of the first component abuts against the support plate.

[0014] Furthermore, the spring is in a compressed state.

[0015] Compared with the prior art, this disclosure sofa chairIt has the following beneficial effects: When no one is leaning against it, the spring is in a compressed state, and the first rack and the second rack are separated from each other. At this time, the first component can slide freely along the vertical direction of the support plate. When someone leans against it, the leaning force pushes the first component to move towards the support plate; the first rack gradually approaches and meshes with the second rack. At this time, the meshing of the first rack and the second rack restricts the movement of the first component in the vertical direction, thus realizing that when no one is leaning against it, the backrest can slide freely in the vertical direction. Users can precisely adjust the height according to their own needs without tools. When someone leans against it, the leaning force automatically triggers the locking mechanism, and the backrest is fixed and stable with no risk of displacement. The operation is simple.

[0016] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this disclosure, nor is it intended to limit the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0017] The above and other objects, features, and advantages of this disclosure will become readily apparent from the following detailed description of exemplary embodiments, taken in conjunction with the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which: In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0018] Figure 1 A schematic diagram of the overall structure of this disclosure is shown; Figure 2 A first schematic diagram of the support plate and the first component of this disclosure is shown; Figure 3 A second schematic diagram of the support plate and the first component of this disclosure is shown; Figure 4 A schematic diagram of the support plate and the first component of this disclosure unfolded is shown; Figure 5 A cross-sectional view of the first component of this disclosure is shown.

[0019] Explanation of the labels in the diagram: 100. Seat cushion; 200. Support plate; 300, First component; 310, First through hole; 400. Backrest; 500, snap-fit ​​mechanism; 510, first rack; 520, second rack; 530, spring; 540, second component; 550, first arc-shaped protrusion; 560, second arc-shaped protrusion. Detailed Implementation

[0020] To make the objectives, features, and advantages of this disclosure more apparent and understandable, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0021] As a widely used piece of furniture in daily life and public spaces, the comfort and adaptability of sofas and chairs directly affect the user experience. Ergonomic studies show that the height of the sofa backrest, especially the support height corresponding to the lumbar region, needs to be adapted to users of different heights and body types in order to effectively relieve lumbar pressure and avoid discomfort caused by prolonged sitting.

[0022] In existing technology, the backrest height adjustment structure of sofas and chairs mostly adopts a "screw + buckle" connection method: the backrest and seat cushion support structure are fixed by screws, and the buckles have multiple preset adjustment positions. Adjustment requires manually loosening the screws, moving the backrest vertically to the target position, and then tightening the screws to complete the fixation. This type of adjustment method has the following significant drawbacks: The operation is cumbersome: the adjustment process requires the use of tools or manual screw turning, which involves many steps and takes a long time. For people with mobility impairments or temporary use scenarios (such as public places), the operation threshold is high. In public places, if a large number of people want to achieve the best fit, they need to frequently turn the screws and move the buckles, which is quite inconvenient.

[0023] Please see Figure 1 , Figure 2 and Figure 3 To address the aforementioned technical problems, a sofa chair is designed, comprising a seat cushion 100, a support board 200, a first component 300, a backrest 400, and a snap-fit ​​mechanism 500. The specific structure and connection relationship of each component are as follows: Seat Cushion 100: Designed to support the weight of the human body, it is filled with high-elasticity sponge, covered with wear-resistant fabric, and has anti-slip pads on the bottom to improve placement stability; Support plate 200: It is fixedly installed on the seat cushion 100 along the first direction (vertical direction in this application), specifically vertically fixed to the rear edge of the seat cushion 100, and the length direction of the support plate 200 is consistent with the first direction; the support plate 200 is made of hard metal plate with a thickness of 2-3mm to ensure structural strength and avoid deformation under stress; Please see Figure 3 and Figure 4The first component 300 is disposed on the support plate 200 and can move along the first direction; a first through hole 310 is provided in the first component 300 along the first direction, through which the support plate 200 passes, so that the first component 300 can slide up and down along the length direction (vertical direction) of the support plate 200; the first component 300 is made of engineering plastic (such as ABS plastic) or lightweight aluminum alloy, taking into account both lightweight and structural strength; Backrest 400: Fixedly installed on the first component 300 to support the weight of the human body; the backrest 400 adopts an ergonomic curved design, is filled with memory foam, and is covered with the same wear-resistant fabric as the seat cushion 100. It is detachably fixed to the first component 300 by bolts, which is convenient for later replacement or maintenance. Please see Figure 4 and Figure 5 The locking mechanism 500 is located between the first component 300 and the support plate 200. It is the core structure for realizing the "free sliding and leaning fixation" of the backrest 400. It includes a first rack 510 on the first component 300, a second rack 520 on the support plate 200, and a spring 530 inside the first component 300.

[0024] When no one is leaning against the backrest 400, the elastic force of the spring 530 causes the first rack 510 and the second rack 520 to separate from each other, and the first component 300 can slide freely along the vertical direction of the support plate 200. The user can easily push the backrest 400 to any height to achieve fine adjustment. When someone is leaning against the backrest 400, the leaning force overcomes the elastic force of the spring 530, causing the first rack 510 and the second rack 520 to engage with each other. The first component 300 is fixed relative to the support plate 200 to ensure the support stability of the backrest 400.

[0025] Please see Figure 4 and Figure 5 Further optimization involves the first rack 510 located on the inner wall of the first through hole 310, and the first rack 510 is integrally formed on the inner wall of the first through hole 310. The second rack 520 is integrally formed on the surface of the support plate 200 facing the inner wall of the first through hole 310. The integrally formed structure prevents the rack from falling off and improves service life. The tooth shapes of the first rack 510 and the second rack 520 are matched (e.g., both adopt helical or straight tooth structures), and the teeth extend along the first direction (vertical direction). When engaged, the teeth mesh with each other, which can effectively limit the vertical sliding of the first component 300 along the support plate 200 and prevent the backrest 400 from shifting. At the same time, when the human body leans against it, it can easily engage and quickly limit the sliding of the first component 300 relative to the support plate 200.

[0026] Please see Figure 5One end of the spring 530 is fixedly installed on the inner wall of the first through hole 310, and the other end abuts against the support plate 200. The length direction of the spring 530 is perpendicular to the first direction (i.e., the horizontal direction in this application). The spring 530 is preferably a compression spring 530. Under normal conditions (when no one is leaning against it), it is in a compressed state and continuously provides horizontal elastic force to push the first rack 510 away from the second rack 520, ensuring that the first component 300 can slide freely. At the same time, the spring 530 can provide a certain pressure so that the first component 300 and the backrest 400 overcome the effect of gravity and prevent the first component 300 and the backrest 400 from falling to the bottom of the support plate 200. There are at least two springs 530, which are located on both sides of the first rack 510, so that the first component 300 is subjected to balanced force and there is no jamming during the sliding process.

[0027] To further improve the stability of the snap-fit ​​mechanism, the snap-fit ​​mechanism 500 also includes a second component 540: the second component 540 is disposed on the side of the spring 530 near the support plate 200, and the side of the second component 540 facing the support plate 200 is provided with a plurality of first arc-shaped protrusions 550 arranged along the first direction (vertical direction); the support plate 200 is correspondingly provided with a plurality of second arc-shaped protrusions 560 arranged along the first direction; when the first component 300 is stationary relative to the support plate 200 (when someone leans against it), the first arc-shaped protrusions 550 and the second arc-shaped protrusions 560 abut against each other, and the first arc-shaped protrusions 550 are embedded between two adjacent second arc-shaped protrusions 560, restricting the sliding of the first component 300 relative to the support plate 200, thereby facilitating adjustment and restricting the movement of the first component 300, that is, when the operator moves the first component 300 to any position, the first component 300 can still remain stationary relative to the support plate 200 under the interaction force of the first arc-shaped protrusions 550 and the second arc-shaped protrusions 560.

[0028] In addition, there are two support plates 200: one support plate 200 is inserted into the first through hole 310 and cooperates with the first rack 510 and the second component 540; the other support plate 200 is located outside the first component 300. When the first rack 510 and the second rack 520 are engaged with each other, the outer wall of the first component 300 abuts against the support plate 200 to form double-sided support, which avoids the first component 300 from being deformed by force on one side and improves the stability of the overall structure.

[0029] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A sofa chair, characterized in that, include: A seat cushion (100) for supporting the weight of a person; A support plate (200) is fixedly disposed on the seat cushion (100) along a first direction; A first component (300) is disposed on the support plate (200). The first component (300) moves along a first direction. A first through hole (310) is provided in the first component (300), and the support plate (200) passes through the first through hole (310). A backrest (400) is fixedly mounted on the first component (300) to support the weight of a human body leaning against it. A snap-fit ​​mechanism (500) is disposed between the first component (300) and the support plate (200). The snap-fit ​​mechanism (500) includes a first rack (510) disposed on the first component (300), a second rack (520) disposed on the support plate (200), and a spring (530) disposed in the first component (300). When no one is leaning against the backrest (400), the elastic force of the spring (530) causes the first rack (510) and the second rack (520) to separate from each other, and the first component can slide freely along the vertical direction of the support plate (200). When someone is leaning against the backrest (400), the leaning force overcomes the elastic force of the spring (530) and causes the first rack (510) and the second rack (520) to snap together, and the first component (300) is fixed relative to the support plate (200).

2. The sofa chair according to claim 1, characterized in that, The first component (300) has a first through hole (310) along the first direction, the support plate (200) passes through the first through hole (310), and the first rack (510) is located on the inner wall of the first through hole (310).

3. The sofa chair according to claim 2, characterized in that, One end of the spring (530) is fixedly installed on the inner wall of the first through hole (310), and the other end of the spring (530) abuts against the support plate (200). The length direction of the spring (530) is perpendicular to the first direction.

4. The sofa chair according to claim 3, characterized in that, The snap-fit ​​mechanism (500) further includes a second component (540), which is disposed on the side of the spring (530) near the support plate (200). The second component (540) has a plurality of first arcuate protrusions (550) arranged along the first direction on the side facing the support plate (200). The support plate (200) has a plurality of second arcuate protrusions (560) arranged along the first direction. When the first component (300) is stationary relative to the support plate (200), the first arcuate protrusions (550) abut against the second arcuate protrusions (560), and the first arcuate protrusions (550) are embedded between two adjacent second arcuate protrusions (560).

5. The sofa chair according to claim 1, characterized in that, The first rack (510) and the second rack (520) have matching tooth profiles, and the teeth of the first rack (510) and the second rack (520) extend along the first direction. When the first rack (510) and the second rack (520) are engaged, the teeth mesh with each other to restrict the first component (300) from sliding along the first direction of the support plate (200).

6. The sofa chair according to claim 1, characterized in that, At least two springs (530) are provided, and at least two springs (530) are respectively located on both sides of the first rack (510).

7. The sofa chair according to claim 2, characterized in that, The first rack (510) is integrally formed on the inner wall of the first through hole (310), and the second rack (520) is integrally formed on the surface of the support plate (200) facing the inner wall of the first through hole (310).

8. The sofa chair according to claim 1, characterized in that, The support plate (200) is vertically fixed to the rear edge of the cushion (100), and the length direction of the support plate (200) is consistent with the first direction.

9. The sofa chair according to claim 2, characterized in that, There are two support plates (200), one of which is located inside the first through hole (310) and the other is located outside the first component (300). When the first rack (510) and the second rack (520) are engaged with each other, the outer wall of the first component (300) abuts against the support plate (200).

10. The sofa chair according to claim 3, characterized in that, The spring (530) is in a compressed state.

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