Elastic backrest and chair

Abstract

Elastic backrest, comprising a backrest frame and an elastic buffer connector (2), in which longitudinal support tubes on two sides of the backrest frame are made up of two or more segmented support tubes, in which at least two segmented support tubes on each side of the backrest frame are connected by the elastic buffer connector (2), in which the elastic buffer connector (2) comprises a frame of elastic material (22) as well as an upper connector (21) and a lower connector (23) respectively fixed to two ends of the frame of elastic material (22), in which the upper connector (21) and an upper segmented support tube are connected to each other by sleeving, and in which 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 camping and fishing, and is also an indispensable item for getting closer to nature. Currently, given the variety of environments in which it is used, outdoor chairs available on the market primarily emphasize structural stability, reliable product quality, and ease of use, and are designed to improve the characteristics of the products themselves (for example, thicker tubes with thicker walls are used together for a backrest), while the comfort of using the backrest is not improved by taking into account the seating comfort of the chair user based on the above.

[0003] With regard to outdoor chairs available on the market, the backrests are formed by combining tubes in a rigid way, and the comfort of the backrests is not improved by an elastic buffer structure, so that people experience discomfort and unease in contact with the backrests during use, and the comfort of the backrests cannot be ensured, which considerably reduces the experience of people 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 up 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 a frame made of elastic material as well as an upper connector and a lower connector respectively fixed to two ends of the frame made of elastic material, 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 have insertion holes, and the upper connector and 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 further be provided with a convex limiting ring which butts against an end part of the segmented support tube.

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

[0010] The elastic material frame can be made of metal or plastic, the elastic material frame has an internal extension part, and the internal extension parts of the elastic material frames located on two sides of the backrest frame are designed to extend towards each other.

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

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

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

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

[0015] The internal extension part of the frame made of elastic material can be formed into an "L" shape by bending round steel.

[0016] An end part of the internal extension part of the frame made of elastic material opposite the segmented support tube can be bent backwards.

[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 articulated, 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 articulated or fixed with the seat tube.

[0018] The chair may further include armrests, in which the armrests each have one end connected to an upper end of the foot tubes, and the other end articulated or fixed with the lower connector or a lower segmented support tube.

[0019] Compared to 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 sleeving, so that it is simple to use and convenient to install. Brief description of the drawings

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

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

[0023] [Fig.2] shows a schematic structural 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 schematic structural 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 IMPLEMENTATION METHODS

[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 that commonly understood by a person skilled in the art relevant to this application.

[0028] It should be noted that the terms used here are intended solely to describe embodiments and are not intended to limit the examples of 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 should also 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 a combination thereof.

[0029] Furthermore, in the description of the present invention, it should be understood that the orientation or position relationships indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "front", "back", "left", "right", "vertical", "horizontal", "upper", "lower", "inside", "clockwise" and "counterclockwise" are orientation or position relationships represented on the basis of drawings, which are intended simply 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 interpreted as a limitation of the present invention.

[0030] Furthermore, the terms "first" and "second" are used solely for descriptive purposes and shall not be construed 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 specified, the term "a plurality of" means two or more, unless expressly defined otherwise.

[0031] In the present invention, unless expressly stated otherwise and defined, 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 connection 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 as such, a first feature that is "above" or "below" a second feature may have the first and second features in direct contact, and may also have the first and second features not in direct contact but in contact through another feature between them. Furthermore, the first feature "On" or "above" the second characteristic means the first characteristic is either 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 means the first characteristic is either 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 together with the drawings and embodiments.

[0034] A chair according to [Fig. 1] 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 the 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 can 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 armrest is provided between the leg tubes and the backrest.

[0036] Both the chair with armrests and the chair without armrests use the following structure for the backrest: 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 up of two or more segmented support tubes, and the lowest segmented support tubes are articulated or fixed to 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 comprises a frame made of elastic material 22 and 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, thus improving the overall strength and 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. 1] 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 the 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 segmented support tubes includes the following two cases.

[0039] First case: the segmented support tube has insertion holes, and the upper connector 21 and the lower connector 23 are respectively inserted into corresponding insertion holes and fit tightly with the segmented support tube; or are fixed by bolts, rivets, or pins. Of course, a hollow segmented support tube can also be selected directly, with the upper connector 21 or the lower connector 23 then being inserted into the segmented support tube. To further improve connection stability, the upper connector 21 and the lower connector 23 are also provided with a convex limiting ring that abuts 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 design the upper connector 21 and the lower connector 23 directly 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 strength and stability of the connection, the segmented support tube is further provided with a convex limiting ring that abuts against 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 maintenance and replacement of the elastic buffer connector 2 as well as assembly and disassembly, and also allows customization of the colors, shapes and materials (e.g. iron tube or aluminum tube) of the elastic buffer connectors 2 and the segmented support tubes, to meet the requirements of different usage scenarios and customization of appearances.

[0042] The elastic material frame is made of metal, plastic, or other elastic materials. The elastic material frame 22 includes an internal extension portion. The internal extension portions of the elastic material frames 22 located on two sides of the backrest frame are designed to extend towards each other, and end portions of the internal extension portions of the elastic material frames 22 opposite the segmented support tubes are bent backwards, 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 back, and once the end portions of the internal extension portions of the elastic material frames 22 are bent backwards, a gap is left between the end portions and the chair back, thus preventing people from butting up against the chair back and experiencing discomfort..

[0043] As shown in [Fig. 2], the internal extension portion of the frame made of elastic material 22 is formed into an "L" shape by bending round steel. As shown in [Fig. 4], the internal extension portion of the frame made of elastic material 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, in order to perform an elastic buffer function when the back of people rests against the back of the chair during use, thus improving the comfort of the back of the outdoor chair.

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

[0046] Although embodiments of the present invention have been presented and described above, it is understood that the above embodiments are given by way of example and shall not be construed as a limitation of the present invention. A person 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 aforementioned embodiments in accordance with the technical essence of the present invention remain within the scope of the technical solutions of the present invention.

Claims

Demands

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

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

3. Elastic folder 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 part of the segmented support tube.

4. Elastic backrest according to any 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 closely with the upper connector (21) or the lower connector (23).

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

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

7. Elastic backrest according to claim 6, characterized in that the elastic material frame (22) is made of metal or plastic, and in which the internal extension parts 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 internal extension part of the frame made of elastic material (22) is folded into a "U" or inverted "U" shaped structure, and the internal extension part is made of round steel.

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

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

11. Chair, comprising a chair seat, a backrest, a seat tube (4) and foot tubes (5), wherein the backrest is arranged above the seat tube (4), a plurality of foot tubes (5) and the seat tube (4) are fixed or articulated, 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 any one of claims 1 to 10, and a lower segmented support tube is articulated or fixed with the seat tube (4).

12. 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 foot tubes (5), and wherein the other end is articulated or fixed with the lower connector (23) or a lower segmented support tube.

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