Elastic backrest and chair

Abstract

An elastic backrest, comprising a backrest frame and an elastic buffer connector (2), wherein longitudinal support tubes on two sides of the backrest frame are made of two or more segmented support tubes, wherein at least two segmented support tubes on each side of the backrest frame are connected by the elastic buffer connector (2), wherein the elastic buffer connector (2) comprises an elastic material frame (22) as well as an upper connector (21) and a lower connector (23) respectively fixed to two ends of the elastic material frame (22), wherein the upper connector (21) and an upper segmented support tube are connected to each other by sleeving, and wherein the lower connector (23) and a lower segmented support tube are connected to each other by sleeving.

Description

Title of the invention: Elastic backrest and chair Technical field

[0001] The present invention applies to the technical field of chairs, and relates in particular to an elastic backrest for a chair. CONTEXT OF THE INVENTION

[0002] An outdoor chair is often used in outdoor environments, such as for outdoor camping and fishing, and is also an indispensable item for getting close to nature. At present, given the variety of usage environments, outdoor chairs available on the market mainly focus on the stability of the structure, the reliability of product quality and the convenience of use, and are designed to improve the characteristics of the products themselves (for example, thicker tubes with a thicker wall combined with each other are used for a backrest), while the comfort of use of the backrest fails to be improved by taking into account the seating comfort of the user of the chair based on the above.

[0003] With regard to outdoor chairs available on the market, the backrests are formed by combining tubes rigidly, and the comfort of the backrests is not improved by an elastic buffer structure, so that people experience discomfort and discomfort when contacting the backrests during use, and the comfort of the backrests cannot be ensured, which greatly reduces people's experience with the outdoor chairs, while also diminishing the pleasant feeling of being close to nature. SUMMARY

[0004] The object of the invention is to provide an elastic backrest for a chair which has a simple structure, is easy to assemble and is very comfortable.

[0005] This object is achieved according to the invention. Advantageous embodiments are provided.

[0006] The elastic backrest of the invention comprises a backrest frame and an elastic buffer connector, wherein longitudinal support tubes on two sides of the backrest frame are made of two or more segmented support tubes, at least two segmented support tubes on each side of the backrest frame are connected by the elastic buffer connector, the elastic buffer connector comprises an elastic material frame as well as an upper connector and a lower connector respectively fixed to two ends of the elastic material frame, the upper connector and an upper segmented support tube are connected to each other by sleeving, and the lower connector and the lower segmented support tube are connected to each other by sleeving.

[0007] The segmented support tube may be provided with insertion holes, and the upper connector and the lower connector are respectively inserted into corresponding insertion holes and fit tightly with the segmented support tube; or are fixed by bolts, rivets or pins.

[0008] The upper connector and the lower connector may be further provided with a convex limiting ring abutting an end portion of the segmented support tube.

[0009] The upper connector and the lower connector may be provided with insertion holes, and the segmented support tube is inserted into corresponding insertion holes and fits tightly with the upper connector or the lower connector; or is secured by bolts, rivets or pins.

[0010] The elastic material frame may be made of metal or plastic, the elastic material frame has an internal extension portion, and the internal extension portions of the elastic material frames located on two sides of the backrest frame are provided to extend toward each other.

[0011] The inner extension portion of the elastic material frame can be bent into a "U" or inverted "U" shaped structure, and the inner extension portion is made of round steel.

[0012] The inner extension part of the elastic material frame can be bent into an "L" shape, and the inner extension part is made of round steel.

[0013] The elastic material frame may have an internal extension portion, and the internal extension portions of the elastic material frames located on two sides of the backrest frame are provided to extend toward each other.

[0014] The inner extension portion of the elastic material frame may have a "U" or inverted "U" shaped structure by bending round steel.

[0015] The inner extension portion of the elastic material frame may be formed into an "L" shape by bending round steel.

[0016] An end portion of the inner extension portion of the elastic material frame opposite the segmented support tube can be bent backward.

[0017] The chair of the invention comprises a chair seat, a backrest, a seat tube and leg tubes, wherein the backrest is arranged above the seat tube, a plurality of leg tubes and the seat tube are fixed or hinged, the chair seat is arranged on the backrest and the seat tube, the backrest is as described in one of the preceding embodiments, and a lowest segmented support tube is hinged or fixed with the seat tube.

[0018] The chair may further include armrests, wherein the armrests each have one end connected to an upper end of the leg tubes, and the other end hinged or secured with the lower connector or a lower segmented support tube.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0020] The backrest frame is designed in multiple sections connected by the elastic buffer connector of the present invention, so that the backrest has elasticity as a whole, the comfort of the chair is improved, and furthermore, the elastic buffer connector and the backrest frame are connected by sleeve, so that it is simple to use and convenient to install. Brief description of the drawings

[0021] The drawings of the description forming part of the present application are used to provide a better understanding of the present application. The exemplary embodiments of the present application and their description are used to explain the present application, but do not constitute a limitation of the present application.

[0022] [Fig-1] shows an overall structural schematic view of a chair (with armrests) of the present invention;

[0023] [Fig.2] shows a structural schematic view of an elastic buffer connector of the present invention;

[0024] [Fig.3] shows an overall structural schematic view of the chair (without armrests) of the present invention; and

[0025] [Fig.4] shows a structural schematic view of another buffer connector elastic of the present invention.

[0026] The reference signs are as follows: 1 upper backrest tube; 2 elastic buffer connector; 21 upper connector; 22 elastic material frame; 23 lower connector; 3 lower backrest tube; 4 seat tube; 5 foot tube; 6 armrest. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] It should be noted that the following detailed description is given by way of example and is intended to provide further explanation of the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application relates.

[0028] It should be noted that the terms used herein are intended only to describe embodiments and are not intended to limit the exemplary embodiments within the scope of this application. As used herein, the singular form is also intended to include the plural form unless the context clearly indicates otherwise. Furthermore, it is also to be understood that when the terms "contain" and / or "comprise" are used in this description, they indicate the presence of a feature, step, operation, part, component and / or combination thereof.

[0029] Furthermore, in describing the present invention, it is to be understood that the orientation or positional relationships indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "front", "rear", "left", "right", "vertical", "horizontal", "upper", "lower", "inner", "clockwise" and "counterclockwise" are orientation or positional relationships shown on the basis of drawings, which are merely intended to facilitate the explanation of the present invention and to simplify the description, rather than to indicate or imply that the devices or elements mentioned must have a particular orientation, or be constructed or operate in the particular orientation, and therefore should not be construed as a limitation of the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or as implicitly indicating the number of associated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly mean the inclusion of one or more such features. In the description of the present invention, unless otherwise indicated, the term "a plurality of" means two or more, unless expressly defined otherwise.

[0031] In the present invention, unless expressly indicated and defined otherwise, terms such as "mount", "couple", "connect" and "fix" are to be understood in a broad sense. For example, a connection may be a fixed connection, a detachable connection or a one-piece connection, may be a mechanical connection or an electrical connection, or may be a direct coupling, an indirect coupling via an intermediate or internal communication between two elements. For those skilled in the art, the specific meanings of the aforementioned terms in the present invention could be understood according to specific circumstances.

[0032] In the present invention, unless expressly stated otherwise and defined differently, a first characteristic that is "above" or "below" a second characteristic may include the first characteristic and the second characteristic in direct contact, and may also include the first characteristic and the second characteristic not in direct contact but in contact via another characteristic therebetween. Additionally, the first characteristic "on" or "above" the second characteristic has the first characteristic directly above or not directly above the second characteristic, or simply means that the level of the first characteristic is higher than that of the second characteristic. A first characteristic "under" or "below" a second characteristic has the first characteristic directly below or not directly below the second characteristic, or simply means that the level of the first characteristic is lower than that of the second characteristic.

[0033] The present invention is described in more detail below in conjunction with the drawings and embodiments.

[0034] A chair according to [Fig.l] is a chair with armrests, and comprises a chair seat, a backrest, a seat tube 4, leg tubes 5 and armrests 6. The backrest is arranged above the seat tube 4. The chair seat is arranged on the backrest and the seat tube 4. A plurality of leg tubes 5 are connected with the seat tube 4, and upper portions of the leg tubes 5 are higher than a plane where the seat tube 4 is located. The armrests 6 each have one end connected to an upper end of the leg tubes 5 and the other end connected to the backrest.

[0035] The chair may also be a chair without armrests according to [Fig. 3]. This chair has substantially the same structure as the chair with armrests and differs in that a plurality of leg tubes 5 are arranged directly below the seat tubes and in that no armrests are provided between the leg tubes and the backrest.

[0036] Both the chair with armrests and the chair without armrests use the backrest of the following structure: an elastic backrest, comprising a backrest frame and an elastic buffer connector 2, in which the longitudinal support tubes on both sides of the backrest frame are composed of two or more segmented support tubes, and the lowest segmented support tubes are articulated or fixed with the seat tubes. At least two segmented support tubes on each side of the backrest frame are connected by the elastic buffer connector 2. The elastic buffer connector 2 includes an elastic material frame 22, as well as an upper connector 21 and a lower connector 23 respectively fixed to two ends of the elastic material frame 22 by welding.The upper connector 21 and the lower connector 23 are fixed to the elastic material frame 22 by welding, thereby improving the overall strength and use stability of the elastic buffer connector 2. The upper connector 21 and an upper segmented support tube are connected to each other by sleeving, and the lower connector 23 and a lower segmented support tube are connected to each other by sleeving.

[0037] The chairs according to [Fig.l] and [Fig.3] each have two segmented support tubes, and the two upper left and right segmented support tubes are connected to form an inverted U-shaped upper backrest tube 1, and two lower segmented support tubes are lower backrest tubes 3. The armrest of the chair with armrests has one end connected to upper ends of the leg tubes 5, and the other end hinged or fixed with the lower connector 23. In other embodiments, when the lower connector 23 is short and the lower backrest tube 3 is long, the other end of the armrest can also be hinged or fixed directly with the lower backrest tube 3.

[0038] A sleeve structure of the elastic buffer connector 2 and the segmented support tubes includes the following two cases.

[0039] First case: The segmented support tube is provided with insertion holes, and the upper connector 21 and the lower connector 23 are respectively inserted into corresponding insertion holes and fit closely with the segmented support tube; or are fixed by bolts, rivets or pins. Of course, a hollow segmented support tube can also be directly selected, with the upper connector 21 or the lower connector 23 then being inserted into the segmented support tube. In order to further improve the connection stability, the upper connector 21 and the lower connector 23 are further provided with a limiting convex ring abutting against an end portion of the segmented support tube.

[0040] Second case: The upper connector 21 and the lower connector 23 are provided with insertion holes, and the segmented support tube is inserted into corresponding insertion holes and fits tightly with the upper connector 21 or the lower connector 23; or is fixed by bolts, rivets or pins. Of course, it is also possible to directly design the upper connector 21 and the lower connector 23 as hollow tubes, with the segmented support tubes then being inserted into the upper connector 21 and the lower connector 23. In order to further improve the connection strength and stability, the segmented support tube is further provided with a limiting convex ring abutting an end portion of the upper connector 21 or the lower connector 23.

[0041] The upper connector 21 or the lower connector 23 and the segmented support tube are fixed by bolts, which can facilitate the maintenance and replacement of the elastic buffer connector 2 as well as the assembly and disassembly, and also allows the colors, shapes and materials (e.g., iron tube or aluminum tube) of the elastic buffer connectors 2 and the segmented support tubes to be customized, to meet the requirements of different usage scenarios and appearance customization.

[0042] The elastic material frame is made of metal, plastic, or other elastic materials. The elastic material frame 22 has an inner extension portion. The inner extension portions of the elastic material frames 22 located on two sides of the backrest frame are provided to extend toward each other, and end portions of the inner extension portions of the elastic material frames 22 away from the segmented support tubes are bent backward, wherein one side of a chair back in contact with a human body is defined herein as a front, and the other side of the chair back is defined as a rear, and after the end portions of the inner extension portions of the elastic material frames 22 are bent backward, a gap is left between the end portions and the chair back, thereby preventing people from butting against the chair back and experiencing discomfort..

[0043] As shown in [Fig.2], the inner extension portion of the elastic material frame 22 is formed into an "L" shape by bending round steel. As shown in [Fig.4], the inner extension portion of the elastic material frame 22 is formed into a "U" or inverted "U" shape by bending round steel.

[0044] In the present invention, the backrest has multiple sections, and the upper backrest tube and the disconnected lower backrest tubes are combined by round steel in a "flexible" manner, so as to accomplish an elastic buffer function at the time when people's back rests against the chair backrest during use, thereby improving the comfort of the outdoor chair backrest.

[0045] In the description of the present specification, the description referring to terms such as "an embodiment", "some embodiments", "example", "specific example" or "some examples" means that specific features, structures, materials or traits described in conjunction with this embodiment or example are included in at least one embodiment or example of the present invention. In the present specification, the indicative expressions of the aforementioned terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or traits may be combined in a suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are given by way of example and should not be construed as a limitation of the present invention. Those skilled in the art could make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principle and objects of the present invention. Any simple modification, any equivalent modification and any modification of the The above-mentioned embodiments in accordance with the technical essence of the present invention remain within the scope of the technical solutions of the present invention.

Claims

Claims

1. An elastic backrest, comprising a backrest frame and an elastic buffer connector (2), wherein longitudinal support tubes on two sides of the backrest frame are constituted of two or more segmented support tubes, wherein at least two segmented support tubes on each side of the backrest frame are connected by the elastic buffer connector (2), wherein the elastic buffer connector (2) comprises an elastic material frame (22) as well as an upper connector (21) and a lower connector (23) respectively fixed to two ends of the elastic material frame (22), wherein the upper connector (21) and an upper segmented support tube are connected to each other by sleeving, and wherein the lower connector (23) and a lower segmented support tube are connected to each other by sleeving.

2. An elastic backrest according to claim 1, characterized in that the segmented support tube is provided with insertion holes, and the upper connector (21) and the lower connector (23) are respectively inserted into corresponding insertion holes and fit closely with the segmented support tubes; or are fixed by bolts, rivets or pins.

3. An elastic backrest according to claim 1 or 2, characterized in that the upper connector (21) and the lower connector (23) are further provided with a convex limiting ring abutting against an end portion of the segmented support tube.

4. Elastic backrest according to one of claims 1 to 3, characterized in that the upper connector (21) and the lower connector (23) are provided with insertion holes, and the segmented support tubes are inserted into corresponding insertion holes and fit tightly with the upper connector (21) or the lower connector (23).

5. Elastic backrest according to claim 4, characterized in that the segmented support tubes are fixed by bolts, rivets or pins.

6. Elastic backrest according to one of claims 1 to 5, characterized in that the frame made of elastic material (22) comprises an internal extension part.

7. An elastic backrest according to claim 6, characterized in that the elastic material frame (22) is made of metal or plastic, and wherein the inner extension portions of the elastic material frames (22) located on two sides of the backrest frame are provided to extend towards each other.

8. Elastic backrest according to claim 6 or 7, characterized in that the inner extension part of the elastic material frame (22) is bent into a "U" or inverted "U" shaped structure, and the inner extension part is made of round steel.

9. Elastic backrest according to claim 6 or 7, characterized in that the inner extension part of the elastic material frame (22) is folded into an L-shaped structure, wherein the inner extension part is made of round steel.

10. Elastic backrest according to one of claims 6 to 9, characterized in that an end portion of the internal extension portion of the elastic material frame (22) opposite the segmented support tube is bent backwards.

11. Chair, comprising a chair seat, a backrest, a seat tube (4) and leg tubes (5), wherein the backrest is arranged above the seat tube (4), a plurality of leg tubes (5) and the seat tube (4) are fixed or hinged, wherein the chair seat is arranged on the backrest and the seat tube (4), characterized in that the backrest is the elastic backrest according to one of claims 1 to 10, and a lowest segmented support tube is hinged or fixed with the seat tube (4).

12. A chair according to claim 11, characterized in that the chair further comprises armrests (6), wherein the armrests (6) each have one end connected to an upper end of the leg tubes (5), and wherein the other end is hinged or fixed with the lower connector (23) or a lower segmented support tube.

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