Seat and chair back thereof

Abstract

The utility model relates to the field of seat accessories, in particular to a seat and a seat back thereof. The chair back comprises a chair back framework used for being connected to the rear end of a chair seat or a tray and a chair back frame fixedly connected to the chair back framework. A flexible supporting surface layer is arranged on the front end face of the chair back frame, and the edge of the flexible supporting surface layer is connected to the edge of the chair back frame; the chair back frame and / or the chair back framework in the flexible supporting surface layer are / is connected with a waist rest assembly, the waist rest assembly is longitudinally and movably arranged on the chair back frame or the chair back framework, and a shifting part for driving the waist rest assembly to longitudinally move is arranged on the rear side of the chair back frame or the chair back framework; the waist rest assembly can support the flexible supporting surface layer forwards. According to the scheme, the back and the waist of a passenger can be supported at the same time, the effect of supporting the waist is achieved, the height of the waist rest can be adjusted according to the requirement of a user, and therefore the use comfort is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of seat accessories, especially to a seat and a chair back thereof. BACKGROUND

[0002] The seat is a kind of seat with backrest and armrest, and the backrest on the seat is generally upright or inclined, when the back of the user is attached to the backrest, there will be a gap between the back of the user and the backrest, so that the back of the human body cannot be completely attached to the backrest, which reduces the supporting effect of the backrest on the back of the human body, and reduces the use comfort of the human body.In addition, a kind of seat with backrest waist rest on the market, but the waist rest is fixed on the backrest and does not move, and the position of the back of the user attached to the waist rest will also be different, which reduces the use comfort of the user. SUMMARY

[0003] To solve the above problems, the first purpose of the utility model is to provide a seat back, the back and waist of the occupant can be supported simultaneously in the scheme, the waist height can be adjusted according to the user's demand, so as to improve the use comfort.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A seat back, comprising a back frame for connecting to the rear end of the seat or tray, and a back frame connected to the back frame; characterized in that: the front end of the back frame is provided with a flexible support surface layer, and the edge of the flexible support surface layer is connected to the edge of the back frame; the back frame and / or the back frame in the flexible support surface layer is connected with a waist rest assembly, the waist rest assembly is longitudinally arranged on the back frame or the back frame, and a driving part is arranged on the back of the back frame or the back frame to drive the longitudinal movement of the waist rest assembly; the waist rest assembly can support the flexible support surface layer forward.

[0006] The utility model adopts the above technical scheme, and the technical scheme relates to a seat back, the lower end of the back frame in the seat back is connected to the rear end of the seat or tray, and the flexible support surface layer on the back frame can be used to support the back of the human body.On this basis, the back frame and / or the back frame in the scheme is connected with a waist rest assembly, the waist rest assembly is in the flexible support surface layer, and the waist rest assembly is supported on the rear side of the flexible support surface layer during use, and then is supported on the waist position of the occupant;The setting of such waist rest does not affect the support of the flexible support surface layer on the back.Further, the waist rest assembly in the scheme is longitudinally arranged on the back frame or the back frame, and the height of the waist rest assembly can be adjusted by acting on the driving part during use, so as to adapt to the use demand of different users.

[0007] Based on the above scheme, the back and waist of the passenger can be supported simultaneously in the scheme, the waist support effect is achieved, and the waist support height can be adjusted according to the user demand, so that the use comfort is improved.

[0008] As a preferred, a recess is built on the rear side wall of the chair back frame, the recess extends to the bottom of the chair back frame; the chair back skeleton is embedded in the recess of the chair back frame, and the bottom of the chair back skeleton is connected to the rear end of the seat or tray. During installation, the bottom of the chair back skeleton is fixed to the rear end of the seat or tray, and then the chair back skeleton is embedded in the recess on the rear side of the chair back frame and fixed.

[0009] In a specific embodiment, the chair back skeleton includes a bottom frame part connected to the rear end of the seat or tray, a longitudinal support connected above the bottom frame part, and a top support connected above the longitudinal support; the top support, the longitudinal support, and part of the bottom frame part of the chair back skeleton are embedded in the recess, and the longitudinal support is located in the middle of the chair back frame.

[0010] As a preferred, a through hole is arranged in the recess of the chair back frame corresponding to the waist part, and a sliding hole corresponding to the through hole is built on the chair back skeleton embedded in the recess; the waist support assembly and the actuating part are connected and slidably arranged on the sliding hole. In this scheme, the through hole is arranged in the recess of the chair back frame, and the sliding hole is arranged on the chair back skeleton, so that the waist support assembly and the actuating part can be installed on the sliding hole of the chair back skeleton.

[0011] As a preferred, an annular plate is built on the chair back skeleton and extends into the through hole, and the sliding hole is built in the annular plate. In this way, the annular plate is embedded in the through hole, so that the sliding hole can correspond to the through hole.

[0012] As a preferred, a connecting block is built on the actuating part and extends forward into the sliding hole, and the rear end of the waist support assembly abuts against the front end of the connecting block and is fixed by a screwing part.

[0013] As a preferred, a sliding groove is built on the rear end surface of the chair back skeleton and is in the same direction as the sliding hole, the actuating part is partially embedded in the sliding groove, and a knob is built on the actuating part for being actuated by fingers. During use, the user applies force to the knob with the hand, so that the actuating part can move along the sliding groove, thereby driving the waist support assembly to move up and down relative to the sliding hole.

[0014] In a specific embodiment, the flexible support surface layer is built as an elastic mesh cloth, which has the effects of elasticity and air permeability.

[0015] Preferably, a top opening is formed on the chair back frame, and a groove is arranged around the top opening; a top support of the chair back frame is arranged in a ring shape around the top opening; and the top support is embeddedly fixed in the groove at the edge of the top opening.

[0016] The second object of the present application is to provide a seat, characterized in that it comprises the seat back as described above. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 4 is a front view of the seat back.

[0018] Figure 2 Fig. 5 is a back view of the seat back.

[0019] Figure 3 Fig. 6 is an exploded view of a lumbar support assembly on the seat back.

[0020] Figure 4 Fig. 7 is an exploded view of the seat back. DETAILED DESCRIPTION

[0021] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0022] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] Example 1:

[0027] like Figures 1-4 As shown, this embodiment relates to a chair back, including a chair back frame 1 for connection to the rear end of the seat or tray, and a chair back frame 2 fixed to the chair back frame 1. A flexible support surface layer is provided on the front end face of the chair back frame 2, and the edge of the flexible support surface layer is connected to the edge of the chair back frame 2. In a specific implementation, the flexible support surface layer is constructed as an elastic mesh fabric, which provides elastic support while also being breathable (not shown in the figures). A lumbar support assembly 3 is connected to the chair back frame 2 and / or chair back frame 1 within the flexible support surface layer. The lumbar support assembly 3 is longitudinally movably disposed on the chair back frame 2 or chair back frame 1, and a toggle component 4 for driving the longitudinal movement of the lumbar support assembly 3 is provided on the rear side of the chair back frame 2 or chair back frame 1. The lumbar support assembly 3 can support the flexible support surface layer forward. The lower end of the chair back frame 1 in this chair back is connected to the rear end of the seat or tray, and the flexible support surface layer on the chair back frame 2 can be used to support the human back. Based on this, a lumbar support component 3 is connected to the backrest frame 2 and / or backrest skeleton 1 in this solution. The lumbar support component 3 is located within the flexible support surface layer. In use, the lumbar support component 3 supports the rear side of the flexible support surface layer, thereby supporting the lumbar region of the occupant. This lumbar support configuration does not affect the flexible support surface layer's support of the back. Furthermore, the lumbar support component 3 in this solution is longitudinally movable on the backrest frame 2 or backrest skeleton 1. In use, the height of the lumbar support component 3 can be adjusted by the actuating component 4 to adapt to the usage needs of different users.

[0028] Based on the above scheme, the back and waist of the user can be supported simultaneously in this scheme, which has a waist supporting effect, and the height of the waist support can be adjusted according to the user's needs, thereby improving the comfort of use.

[0029] As Figure 4 shown, the rear wall of the chair back frame 2 is provided with a groove 21 extending to the bottom of the chair back frame 2. The chair back skeleton 1 is embedded in the groove 21 of the chair back frame 2, and the bottom of the chair back skeleton 1 is connected to the rear end of the seat or tray. During installation, the bottom of the chair back skeleton 1 is fixed to the rear end of the seat or tray, and then the chair back skeleton 1 is embedded in the groove 21 on the rear side of the chair back frame 2 and fixed. In a specific embodiment, the chair back skeleton 1 includes a bottom frame portion 11 connected to the rear end of the seat or tray, a longitudinal support 12 connected above the bottom frame portion 11, and a top support 13 connected above the longitudinal support 12. The top support 13, the longitudinal support 12, and part of the bottom frame portion 11 of the chair back skeleton 1 are embedded in the groove 21, and the longitudinal support 12 is located in the middle of the chair back frame 2. The chair back frame 2 is provided with a top opening 20, and the groove 21 is arranged around the top opening 20. The top support 13 of the chair back skeleton 1 is arranged in the form of a ring around the top opening 20. The top support 13 is embedded and fixed in the groove 21 on the edge of the top opening 20.

[0030] As Figure 1 and 4 shown, the groove 21 of the chair back frame 2 is provided with a through hole 22 corresponding to the waist position, and the chair back skeleton 1 embedded in the groove 21 is provided with a sliding hole 14 corresponding to the through hole 22. The waist support assembly 3 and the actuating part 4 are connected and slidably arranged on the sliding hole 14. In this scheme, the through hole 22 is arranged in the groove 21 of the chair back frame 2, and the sliding hole 14 is arranged on the chair back skeleton 1, so that the waist support assembly 3 and the actuating part 4 can be installed on the sliding hole 14 of the chair back skeleton 1. The chair back skeleton 1 is provided with a ring-shaped plate 15 extending into the through hole 22, and the sliding hole 14 is arranged inside the ring-shaped plate 15. In this way, based on the embedding of the ring-shaped plate 15 into the through hole 22, the sliding hole 14 can be corresponded to the through hole 22.

[0031] As preferred, the knob 4 is provided with a connecting block 41 extending into the sliding hole 14, the rear end of the lumbar support assembly 3 abuts the front end of the connecting block 41 and is fixed by a screwing member. The rear end surface of the backrest frame 1 is provided with a sliding groove 16, the sliding groove 16 is in the same direction as the sliding hole 14, the knob 4 is partially embedded in the sliding groove 16, and the knob 4 is provided with a knob 42 for finger operation. In use, the user applies force to the knob 42, so that the knob 4 can move along the sliding groove 16, thereby driving the lumbar support assembly 3 to move up and down relative to the sliding hole 14.

[0032] Embodiment 2:

[0033] The second purpose of the utility model is to provide a seat, which comprises the seat backrest in embodiment 1.

[0034] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model. The ordinary skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model.

Claims

1. A seat back comprising a backrest frame (1) for attachment to the rear end of a seat pan or tray, and a backrest shell (2) fixed to the backrest frame (1); characterized in that: The front end surface of the chair back frame (2) is provided with a flexible support surface layer, the edge of the flexible support surface layer is connected to the edge of the chair back frame (2); the chair back frame (2) and / or the chair back skeleton (1) in the flexible support surface layer is connected with a waist support assembly (3), the waist support assembly (3) is longitudinally movably arranged on the chair back frame (2) or the chair back skeleton (1), and a pushing part (4) for driving the waist support assembly (3) to move longitudinally is arranged on the rear side of the chair back frame (2) or the chair back skeleton (1); the waist support assembly (3) can forwardly support the flexible support surface layer.

2. A seat back as defined in claim 1, characterized by: A recess (21) is formed on the rear side wall of the chair back frame (2), the recess (21) extends to the bottom of the chair back frame (2); the chair back skeleton (1) is embedded in the recess (21) of the chair back frame (2), and the bottom of the chair back skeleton (1) extends from the bottom of the chair back frame (2) and is connected to the rear end of a seat or a tray.

3. A seat back as defined in claim 2, wherein: The chair back skeleton (1) comprises a bottom frame part (11) connected to the rear end of a seat or a tray, a longitudinal support (12) connected above the bottom frame part (11), and a top support (13) connected above the longitudinal support (12); the top support (13), the longitudinal support (12), and part of the bottom frame part (11) of the chair back skeleton (1) are embedded in the recess (21), and the longitudinal support (12) is located in the middle of the chair back frame (2).

4. A seat back as defined in claim 2, wherein: A through hole (22) corresponding to the waist position is arranged in the recess (21) of the chair back frame (2), and a sliding hole (14) corresponding to the through hole (22) is formed on the chair back skeleton (1) embedded in the recess (21); the waist support assembly (3) and the pushing part (4) are connected and slidably arranged in the sliding hole (14).

5. A seat back as defined in claim 4, wherein: An annular plate (15) extending into the through hole (22) is formed on the chair back skeleton (1), and the sliding hole (14) is formed in the annular plate (15).

6. A seat back as defined in claim 4, wherein: A connecting block (41) extending forward into the sliding hole (14) is formed on the pushing part (4), and the rear end of the waist support assembly (3) abuts against the front end of the connecting block (41) and is fixed by a screwing part.

7. A seat back as defined in claim 4, wherein: A sliding groove (16) is formed on the rear end surface of the chair back skeleton (1), the sliding groove (16) is in the same direction as the sliding hole (14), the pushing part (4) is partially embedded in the sliding groove (16), and a pushing block (42) for being pushed by fingers is formed on the pushing part (4).

8. A seat back as defined in claim 1, wherein: The flexible support surface layer is formed as an elastic mesh cloth.

9. A seat back as defined in claim 3, wherein: A top opening (20) is formed on the chair back frame (2), and the recess (21) is arranged around the top opening (20); the top support (13) of the chair back skeleton (1) is formed in an annular shape arranged around the top opening (20); and the top support (13) is embedded and fixed in the recess (21) at the edge of the top opening (20).

10. A seat, characterized by: A seat back according to any one of claims 1-9.

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