Seat connecting structure and seat

Abstract

The utility model discloses a seat connecting structure and a seat.The seat connecting structure comprises a backrest and armrests, the backrest can rotate relative to the armrests, the backrest and the armrests have an overlapping area, the overlapping area has the maximum outer contour curve in the sitting posture state, and the maximum outer contour curve comprises a first curve, a second curve and a third curve; the maximum rotation radius of the third curve is not greater than the minimum rotation radius of the second curve, and the maximum rotation radius of the second curve is not greater than the minimum rotation radius of the first curve. According to the seat connecting structure and the seat, the structural arrangement is reasonable, good matching in the backrest rotating process can be achieved, and the seat is more attractive.

Description

Technical Field

[0001] The present application relates to the technical field of seats, and in particular to a seat connection structure and a seat. Background Art

[0002] Existing seating furniture, such as chairs, sofas, etc., can provide people with a comfortable resting position, are loved by people, and are widely used in people's home life.

[0003] The matching relationship between the backrest and armrest of the traditional sofa is misaligned. Although the matching difficulty is low, the shape is discontinuous and there is a significant gap. In addition, if there is relative rotation between the armrest and the backrest, it is easy to cause friction or the gap is too large and unsightly. Utility Model Content

[0004] The purpose of the present application is to provide a seat connection structure and a seat furniture, which has a simple structure, can reduce friction, and can also achieve the aesthetic connection between the backrest and the armrest during the rotation process.

[0005] In a first aspect, the present application provides a seat connection structure, comprising a backrest and an armrest, wherein the backrest can rotate relative to the armrest, the backrest and the armrest having an overlapping area, the overlapping area having a maximum outer contour curve in a sitting state, the maximum outer contour curve comprising a first curve, a second curve and a third curve connected in sequence, the maximum rotation radius of the third curve being no greater than the minimum rotation radius of the second curve, and the maximum rotation radius of the second curve being no greater than the minimum rotation radius of the first curve.

[0006] By adopting the above technical solution, in the sitting state, the maximum outer contour curve represents the outer intersecting contour of the backrest and the armrest. The setting of the rotation radius of the first curve, the second curve and the third curve connected in sequence of the maximum outer contour curve can achieve that when the backrest rotates from the sitting state to the lying state, the third curve smoothly enters the second curve area, and the second curve smoothly enters the first curve area, so that the friction between the backrest and the armrest is small, and even the effect of no mutual friction can be achieved, and the rotation is smoother. In addition, in the process of rotating from the sitting state to the lying state, the gap change between the backrest and the armrest can also be reduced in appearance, the gap difference is small, the shape is more continuous, and it is more beautiful.

[0007] In a further embodiment, during the rotation of the backrest from a sitting position to a lying position relative to the armrest, the distance between each point of the outer contour line of the backrest located in the overlapping area and the maximum outer contour curve is less than 20 mm.

[0008] By adopting the above technical solution, the position change of the combination of the backrest and the armrest can be small, and the visual appearance is better. The distance between each point of the outer contour line of the backrest in the overlapping area and the maximum outer contour curve is less than 20 mm. Of course, the smaller the better. The ideal distance between the outer contour line of the backrest and the maximum outer contour curve is zero during the rotation of the backrest. Because of the problem of processing accuracy, this solution can achieve a small change in distance during the rotation of the backrest, and the visual change is not obvious, which can improve the aesthetics of the seat in various states.

[0009] In a further embodiment, the rotation radius of each point on the first curve, the second curve and the third curve is the same.

[0010] By adopting the above technical solution, when the backrest rotates from a sitting position to a lying position relative to the armrest, the third curve enters the coverage area of ​​the second curve, and the second curve enters the coverage area of ​​the first curve. The rotation radius of each point on the first curve, the second curve and the third curve is the same, so that the backrest can rotate more smoothly and the possibility of the overlapping area entering the outside of the rotation area during the rotation of the backrest and causing interference in the rotation is reduced.

[0011] In a further embodiment, the armrest has a groove, and a partial area of ​​the backrest is located in the groove.

[0012] By adopting the above technical solution, the backrest and the armrest are more compactly combined, the gap between the two is reduced, the gap is smaller, and the appearance looks better combined and more beautiful.

[0013] In a further embodiment, a motion envelope surface is formed on a side of the backrest facing the groove during rotation from a sitting position to a lying position, the groove has a bottom surface and a side surface, and the motion envelope surface has a gap with the bottom surface and the side surface.

[0014] By adopting the above technical solution, there is a gap between the motion envelope surface of the backrest and the bottom and side surfaces of the groove, which can make the rotation of the backrest smoother, reduce the possibility of interference, and improve the experience of adjusting the backrest posture.

[0015] In a further embodiment, the groove has a first edge contour, and the backrest has a second edge contour. During the rotation of the backrest from a sitting position to a lying position relative to the armrest, on the center plane of the backrest, the projection of the second edge contour is always located within the projection of the first edge contour; in the sitting position, the second edge contour is the maximum outer contour curve, and the first edge contour is similar to the second edge contour.

[0016] By adopting the above technical solution, when the backrest rotates from a sitting position to a lying position relative to the armrest, the projection of the second edge contour on the center surface of the backrest is always located within the projection of the first edge contour, and the matching part of the backrest and the armrest is always located in the groove during the rotation process, effectively preventing the backrest from interfering with the outer part of the armrest groove during the rotation process. The first edge contour is similar to the second edge contour, and when there is a gap in the groove between the backrest and the armrest, the appearance seam looks more uniform and more beautiful.

[0017] In a further embodiment, during the rotation of the backrest relative to the armrest from a sitting position to a lying position, the distance between the first edge contour and the second edge contour changes by no more than 10 mm.

[0018] By adopting the above technical solution, the distance between the first edge contour and the second edge contour changes by no more than 10 mm, and the visual change is not obvious when the backrest rotates from a sitting position to a lying position relative to the armrest, and the overall visual effect is better.

[0019] In a further embodiment, the groove has a first edge contour, and the backrest has a second edge contour. During the rotation of the backrest from a sitting position to a lying position relative to the armrest, on the center plane of the backrest, the projection of the second edge contour is always outside the projection of the first edge contour.

[0020] By adopting the above technical solution, when observed from the outside, the backrest can completely cover the groove. When the backrest rotates from a sitting position to a lying position relative to the armrest, no gap exposed by the groove can be seen. The overall appearance is better, more beautiful, and more upscale.

[0021] In a further embodiment, the groove is located on the outer surface of the armrest, and the backrest and the armrest form a C-shaped structure.

[0022] By adopting the above technical solution, the groove is located on the outer surface of the armrest, and the backrest and the armrest are connected on the outside, so that the joint gap between the backrest and the armrest can be located in the outer area of ​​the seat, reducing the risk of people accidentally entering the gap between the backrest and the armrest and causing the hand to be pinched, which is safer and does not affect the overall visual appearance.

[0023] In a second aspect, the present application provides a seat comprising the seat connection structure as described in the first aspect.

[0024] The seat furniture adopting the seat connection structure of the first aspect has a simple structure, which can not only improve the production efficiency of the seat, but also achieve good coordination and aesthetics between the backrest and the armrest during the rotation process.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. The seat connection structure of the present application has a simple structure, low cost and is easy to produce and process.

[0027] 2. The seat connection structure of the present application has smooth and flexible rotation, convenient operation, and is safer.

[0028] 3. The seat connection structure of the present application can be designed and processed with complex curved surfaces, with flexible and diverse shapes, and also has an overall and beautiful appearance in all rotation states.

[0029] 4. The seat of the present application can achieve good coordination and aesthetics with the armrests during the rotation of the backrest, thereby increasing the comfort experience of the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional structural schematic diagram of the backrest and armrest assembly of the first embodiment of the seat connection structure of the present application;

[0031] Figure 2 This is a schematic diagram of the top view of the assembly of the backrest and the armrest of the first embodiment of the seat connection structure of the present application;

[0032] Figure 3 It is a side view structural diagram of the backrest and armrest assembly of the first embodiment of the seat connection structure of the present application;

[0033] Figure 4 It is a structural schematic diagram of the first embodiment of the seat connection structure of the present application in the sitting position and lying position of the backrest;

[0034] Figure 5 This is a schematic structural diagram of a backrest of the first embodiment of the seat connection structure of the present application;

[0035] Figure 6 This is a schematic structural diagram of an armrest of a first embodiment of the seat connection structure of the present application;

[0036] Figure 7 It is a schematic diagram of the longitudinal surface structure of the backrest and armrest assembly of the first embodiment of the seat connection structure of the present application;

[0037] Figure 8 It is a schematic diagram of a first cross-sectional structure of a backrest and an armrest assembled in a first embodiment of a seat connection structure of the present application;

[0038] Fig. 9 It is a top view of a first cross-sectional structure of a backrest and an armrest assembled in a first embodiment of the seat connection structure of the present application;

[0039] Fig.10 It is a schematic diagram of a second cross-sectional structure of a backrest and an armrest assembly in a first embodiment of the seat connection structure of the present application;

[0040] Fig.11 It is a top view of the second cross-sectional structure of the backrest and armrest assembly of the first embodiment of the seat connection structure of the present application;

[0041] Fig.12 It is a schematic diagram of the third transverse cross-sectional structure of the backrest and armrest assembly of the first embodiment of the seat connection structure of the present application;

[0042] Fig.13 It is a top view of the third transverse cross-sectional structure of the backrest and armrest assembly of the first embodiment of the seat connection structure of the present application;

[0043] Fig.14 is a side view of a second embodiment of the seat connection structure of the present application;

[0044] Fig.15 is a transverse cross-sectional schematic diagram of a second embodiment of the seat connection structure of the present application;

[0045] Fig.16 It is a schematic diagram of the appearance structure of the seat of the present application.

[0046] Reference numerals:

[0047] 1. Backrest; 11. First curve; 12. Second curve; 13. Third curve; 14. Second edge profile; 15. Assembly surface; 2. Armrest; 21. Groove; 211. First edge profile; 212. Bottom; 213. Side; 3. Overlap area; 4. Seat cushion; R, Second curve rotation radius; O, Backrest rotation center. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various configurations. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0052] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0053] Embodiment 1

[0054] See also Figure 1-Figure 13 The seat connection structure of this embodiment includes a backrest 1 and an armrest 2, and the backrest 1 can rotate relative to the armrest 2.

[0055] See also Figure 2 The projections of the backrest 1 and the armrest 2 on the center plane of the backrest 1 (the dotted line in the figure) have an overlapping area 3, the two armrests 2 are located on the inner side of the backrest 1, and the armrest 2 and the backrest 1 are connected to form a C-shaped semi-frame.

[0056] See also Figure 3 , represents the side view of the backrest 1 and the armrest 2 after being assembled in the sitting state. The overlapping area 3 has a maximum outer contour curve in the sitting state. The maximum outer contour curve in this embodiment is equivalent to the part of the curve where the projection curve of the backrest 1 on the central plane of the backrest 1 in the sitting state is located within the projection curve of the armrest 2 on the central plane of the backrest 1. The maximum outer contour curve includes a first curve 11, a second curve 12 and a third curve 13 connected in sequence. The maximum rotation radius of the third curve 13 is not greater than the minimum rotation radius of the second curve 12, and the maximum rotation radius of the second curve 12 (the dotted circle in the figure represents the circle drawn along the rotation center O of the backrest by the rotation radius R of the second curve) is not greater than the minimum rotation radius of the first curve 11. In this embodiment, the first curve 11 is larger than the second curve 12, and the second curve 12 is larger than the third curve 13.

[0057] See also Figure 4When the backrest 1 rotates from a sitting position (shown by the dotted line outline of the backrest 1 in the figure) to a lying position (shown by the solid line outline of the backrest 1 in the figure), the third curve 13 enters the second curve 12 area, and the second curve 12 enters the first curve 11 area, both within the original overlapping area 3, and the interference between the backrest 1 and the armrest 2 in the overlapping area 3 is small, and the rotation is smoother. In the optimal solution, the rotation radius of each point on the first curve 11, the second curve 12 and the third curve 13 is the same, the appearance changes little, and it is more beautiful.

[0058] See also Figure 4 and Figure 5 When the backrest 1 rotates relative to the armrest 2 from the sitting position to the lying position, the distance between each point of the second edge contour 14 of the backrest 1 located in the overlapping area 3 and the maximum outer contour curve is less than 20 mm, and optimally less than 10 mm. Such a design can make the appearance of the backrest 1 in various postures not too abrupt, and the side view 213 is more coordinated and beautiful.

[0059] See also Figure 6 The handrail 2 has a groove 21 , and the groove 21 has a first edge contour 211 .

[0060] See also Figure 5 and Figure 6 The backrest 1 has a mounting surface 15 , which matches with the groove 21 of the armrest 2 and is at least partially located in the groove 21 .

[0061] See also Figure 4-Figure 6 In this embodiment, the second edge contour 14 of the backrest 1 is located outside the first edge contour 211, and a part of the backrest 1 is located in the groove 21. In the sitting state, the groove 21 cannot be seen from the outside, and the appearance is simpler.

[0062] See also Figure 7 A motion envelope surface is formed on the side of the backrest 1 facing the groove 21 during the rotation from the sitting position to the lying position. The groove 21 has a bottom surface 212 and a side surface 213 , and there is a gap between the motion envelope surface and the bottom surface 212 and the side surface 213 .

[0063] See also Figure 8-Figure 13 It can be clearly seen from the cross sections at different heights that there is a gap between the motion envelope surface and the bottom surface 212 and the side surface 213, which reduces interference and makes the backrest 1 rotate more smoothly.

[0064] Embodiment 2

[0065] See also Fig.14 and Fig.15The difference between this embodiment and the first embodiment is that the first edge contour 211 of the groove 21 is located outside the second edge contour 14 of the backrest 1 and there is a gap between the two. When the backrest 1 rotates from the sitting state to the lying state relative to the armrest 2, the projection of the second edge contour 14 on the center plane of the backrest 1 is always located inside the projection of the first edge contour 211. In the sitting state, the second edge contour 14 is the maximum outer contour curve, and the first edge contour 211 is similar to the second edge contour 14.

[0066] See also Fig.15 During the rotation of the backrest 1 relative to the armrest 2 from a sitting position to a lying position, there is always a gap in the overlapping area 3 of the backrest 1 and the armrest 2, and the distance between the first edge contour 211 and the second edge contour 14 does not change by more than 10 mm, which can minimize the appearance changes in different postures.

[0067] Embodiment 3

[0068] See also Figure 1 and Figure 2 The difference between this embodiment and the first or second embodiment is that the maximum outer contour curve may also include the contour curve of the armrest 2 located inside the backrest 1 in the sitting state. This embodiment is used in combination with the first and second embodiments to achieve good visual effects on both the outer and inner sides.

[0069] In the specific implementation process, the armrest 2 can also be arranged on the outside of the backrest 1, and the seat connection structure in the above embodiment is still used between the backrest 1 and the armrest 2 to achieve smooth rotation while taking into account the beautiful appearance.

[0070] Embodiment 4

[0071] See also Fig.16 This embodiment discloses a seat, specifically a sofa, including a seat cushion 4 and the seat connection structure of the first embodiment or the second embodiment, wherein the backrest 1 or the armrest 2 of the seat connection structure is connected and fixed to the seat cushion 4.

[0072] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes, modifications, substitutions and variants, and these changes, modifications, substitutions and variants all fall within the scope of the utility model claimed for protection.

Claims

1. A seat connection structure, characterized in that: The invention comprises a backrest (1) and an armrest (2), wherein the backrest (1) can rotate relative to the armrest (2), the backrest (1) and the armrest (2) have an overlapping area (3), the overlapping area (3) has a maximum outer contour curve in a sitting state, the maximum outer contour curve comprises a first curve (11), a second curve (12) and a third curve (13) connected in sequence, the maximum rotation radius of the third curve (13) is not greater than the minimum rotation radius of the second curve (12), and the maximum rotation radius of the second curve (12) is not greater than the minimum rotation radius of the first curve (11).

2. The seat connection structure according to claim 1, characterized in that: During the rotation of the backrest (1) from a sitting position to a lying position relative to the armrest (2), the distance between each point of the outer contour line of the backrest (1) located in the overlapping area (3) and the maximum outer contour curve is less than 20 mm.

3. The seat connection structure according to claim 1, characterized in that: The rotation radius of each point on the first curve (11), the second curve (12) and the third curve (13) is the same.

4. The seat connection structure according to any one of claims 1 to 3, characterized in that: The armrest (2) has a groove (21), and a partial area of ​​the backrest (1) is located in the groove (21).

5. The seat connection structure according to claim 4, characterized in that: A motion envelope curved surface is formed on a side of the backrest (1) facing the groove (21) during rotation from a sitting position to a lying position, the groove (21) has a bottom surface (212) and a side surface (213), and there is a gap between the motion envelope curved surface and the bottom surface (212) and the side surface (213).

6. The seat connection structure according to claim 4, characterized in that: The groove (21) has a first edge contour (211), and the backrest (1) has a second edge contour (14); when the backrest (1) rotates relative to the armrest (2) from a sitting position to a lying position, on the central plane of the backrest (1), the projection of the second edge contour (14) is always located within the projection of the first edge contour (211); in the sitting position, the second edge contour (14) is the maximum outer contour curve, and the first edge contour (211) is similar to the second edge contour (14).

7. The seat connection structure according to claim 6, characterized in that: During the rotation of the backrest (1) relative to the armrest (2) from a sitting position to a lying position, the distance between the first edge contour (211) and the second edge contour (14) changes by no more than 10 millimeters.

8. The seat connection structure according to claim 4, characterized in that: The groove (21) has a first edge contour (211), and the backrest (1) has a second edge contour (14). When the backrest (1) rotates from a sitting position to a lying position relative to the armrest (2), on the central plane of the backrest (1), the projection of the second edge contour (14) is always located outside the projection of the first edge contour (211).

9. The seat connection structure according to claim 4, characterized in that: The groove (21) is located on the outer surface of the armrest (2), and the backrest (1) and the armrest (2) form a C-shaped structure.

10. A seat, characterized in that: It comprises a seat connection structure as described in any one of claims 1 to 9.

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