Chair back structure and seat

Abstract

The utility model provides a chair back structure and a seat, the chair back structure comprises a back bracket and a back frame arranged on the back bracket, and the back bracket and the back frame are positioned on two different planes; the back bracket comprises an annular bracket body, at least two fixing parts formed by extending from one side of the bracket body to the direction close to the back frame, and first fixing holes penetrating through the fixing parts; the two fixing parts are arranged at an interval; the back frame comprises an annular back frame body, at least two mounting parts and first threaded holes; one side of the back frame body protrudes and extends to form the at least two mounting parts; each first threaded hole is formed in the corresponding mounting part; the fixing part and the mounting part are arranged opposite to each other, and a first screw sequentially penetrates through the first fixing hole and the first threaded hole to form threaded connection and fixation. The chair back structure is convenient for rapid boxing, increases the loading quantity, and reduces the boxing and transportation cost.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a chair back structure and a seat. Background Technology

[0002] A chair is a type of seating furniture with a backrest, and some also have armrests. With market competition and social development, the industry is also evolving, resulting in a wide variety of chair types, each with different functions to meet the needs of users.

[0003] Existing chairs generally include a base, a seat, a back support, and a back frame; the seat is fixed to the base, the back support is fixed to one side of the seat, and the back frame is installed on the back support to achieve the effect of leaning back.

[0004] However, the aforementioned back support and back frame are both integrated structures, forming a certain angle between them. Therefore, they occupy a large volume during packaging, resulting in a smaller container capacity and increased packaging and transportation costs. Utility Model Content

[0005] This utility model provides a chair back structure to solve the problem of high packaging and transportation costs of existing chair back structures.

[0006] In a first aspect, this utility model provides a chair back structure, including a back support and a back frame mounted on the back support, wherein the back support and the back frame are located on two different planes;

[0007] The back support includes a ring-shaped support body, at least two fixing parts extending from one side of the support body toward the back frame, and a first fixing hole penetrating each of the fixing parts; the two fixing parts are arranged at intervals.

[0008] The back frame includes a ring-shaped back frame body, at least two mounting portions extending from one side of the back frame body, and a first threaded hole formed in each of the mounting portions; the fixing portion is disposed opposite to the mounting portion and is screwed and fixed by a first screw passing through the first fixing hole and the first threaded hole in sequence.

[0009] Preferably, the fixing part includes a fixing part body fixed to the bracket body, a guide groove formed by recessing the fixing part body into the mounting part from one end of the fixing part body near the mounting part, and a clearance position passing through the fixing part body on the side away from the bracket body; the clearance position communicates with the guide groove, and the first fixing hole is formed in the fixing part body.

[0010] The mounting part includes a mounting part body and a connecting part extending from the side of the mounting part body away from the back support, the connecting part being fixed to the back frame body; the mounting part body is disposed in the guide groove, and the connecting part is located in the clearance position.

[0011] Preferably, the guide groove wall includes two semi-circular arc sidewalls disposed opposite to each other and a flat bottom wall connecting the two semi-circular arc sidewalls; the flat bottom wall is disposed opposite to the clearance position;

[0012] The mounting body includes a cylindrical limiting rod and a flat portion formed on the side of the limiting rod near the back support; the first threaded hole is formed on the limiting rod; the two sides of the limiting rod respectively abut against the two semi-circular sidewalls, and the flat portion contacts the flat bottom wall.

[0013] Preferably, the chair back structure further includes reinforcing ribs fixed to the outside of the fixing part;

[0014] The back frame also includes a groove formed by the recess of the back frame body from the side near the back support toward the direction away from the back support, the groove being located on opposite sides of the mounting portion; the reinforcing rib is disposed in the groove.

[0015] Preferably, the chair back structure further includes a support portion fixed to the bracket body and located between the two fixing portions, the support portion having a second fixing hole passing through it;

[0016] The chair back structure also includes a limiting groove recessed on one side of the back frame body and a second threaded hole penetrating the groove wall; the end of the support part away from the bracket body is disposed in the limiting groove, and the support part and the back frame body are fixedly connected by a second screw passing through the second fixing hole and the second threaded hole in sequence.

[0017] Preferably, the limiting groove is a semi-circular arc structure; the support part includes a support part body formed on the bracket body and a semi-circular arc part formed by extending from the support part body towards one end close to the back frame, the second fixing hole is formed in the semi-circular arc part, and the semi-circular arc part is disposed in the semi-circular arc groove.

[0018] Preferably, the chair back structure further includes a first support plate fixed to the bracket body and located on one side of the support portion, and a second support plate fixed to the back frame body and located on the side of the limiting groove near the back bracket; the first support plate is in contact with the second support plate.

[0019] Preferably, the first support plate includes a rectangular frame and a plurality of partitions spaced apart within the frame; the second support plate is disposed on the upper surface of the frame.

[0020] Preferably, the support portion includes two parts, which are respectively disposed at intervals between the two fixing portions;

[0021] The limiting groove includes two grooves, which are respectively disposed between the two mounting parts; each of the supporting parts is disposed in one of the limiting grooves.

[0022] Secondly, this utility model embodiment provides a seat, including the aforementioned backrest structure.

[0023] Compared with the prior art, the chair back structure of this utility model, by installing the back frame onto the back support, the back support includes a ring-shaped support body, at least two fixing parts extending from one side of the support body towards the back frame, and a first fixing hole penetrating each fixing part; the two fixing parts are arranged at intervals; the back frame includes a ring-shaped back frame body, at least two mounting parts protruding from one side of the back frame body, and a first threaded hole formed in each mounting part; the fixing parts and mounting parts are arranged opposite each other and are screwed together by first screws passing through the first fixing hole and the first threaded hole in sequence; the back frame and the back support are fixedly connected by the first screws, which facilitates the assembly and disassembly of the back frame and the back support, thus reducing the maximum packing value, increasing the container capacity, and reducing packing and transportation costs. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the chair back structure provided in this embodiment of the utility model;

[0026] Figure 2 This is an exploded structural diagram of the chair back structure provided in this embodiment of the utility model;

[0027] Figure 3 yes Figure 1 A sectional view along line AA.

[0028] Figure 4 yes Figure 2 Enlarged view of part B in the middle;

[0029] Figure 5 yes Figure 2 Enlarged view of part C;

[0030] Figure 6This is a schematic diagram of the back frame of the chair back structure provided in this embodiment of the utility model;

[0031] Figure 7 yes Figure 6 Enlarged view of part of D;

[0032] Figure 8 This is a schematic diagram of the internal structure of the chair back structure provided in this embodiment of the utility model;

[0033] Figure 9 This is a schematic diagram of the assembled state of the chair back structure provided in this embodiment of the utility model;

[0034] Figure 10 This is a schematic diagram of the disassembled and packed state of the chair back structure provided in this embodiment of the utility model.

[0035] In the diagram, 100 is the chair back structure; 1 is the back support; 11 is the support body; 12 is the fixing part; 121 is the fixing part body; 122 is the guide groove; 1221 is the semi-circular side wall; 1222 is the flat bottom wall; 123 is the clearance position; 13 is the first fixing hole; 2 is the back frame; 21 is the back frame body; 22 is the mounting part; 221 is the mounting part body; 2211 is the limiting rod; 2212 is the flat part; 222 is the connecting part; 23 is the first threaded hole; 24 is the limiting groove; 25 is the second threaded hole; 3 is the first screw; 4 is the second screw; 5 is the reinforcing rib; 6 is the groove; 7 is the support part; 71 is the support part body; 72 is the semi-circular part; 73 is the second fixing hole; 8 is the first support plate; 81 is the frame; 82 is the partition; and 9 is the second support plate. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, every other embodiment obtained by those of ordinary skill in the art without creative effort is within the protection scope of the present utility model.

[0037] Example 1

[0038] Combined with appendix Figures 1-8 As shown, this embodiment of the present invention provides a chair back structure 100, including a back support 1 and a back frame 2 mounted on the back support 1. The back support 1 and the back frame 2 are located on two different planes. The back support 1 includes a ring-shaped support body 11, at least two fixing parts 12 extending from one side of the support body 11 toward the back frame 2, and a first fixing hole 13 penetrating each fixing part 12; the two fixing parts 12 are arranged at intervals.

[0039] The back frame 2 includes a ring-shaped back frame body 21, at least two mounting portions 22 extending from one side of the back frame body 21, and a first threaded hole 23 formed in each mounting portion 22. The fixing portion 12 is arranged opposite to the mounting portion 22 and is screwed together by a first screw 3 passing through the first fixing hole 13 and the first threaded hole 23 in sequence. The two fixing portions 12 and the two mounting portions 22 are fixedly connected, which facilitates the shifting of the back frame 2 and the back support 1 under pressure, and the fixing effect is good.

[0040] Specifically, during use, a nut with a pre-embedded first threaded hole 23 is installed on the back frame 2. During installation, the mounting part 22 of the back frame 2 is aligned with the fixing part 12 of the back bracket 1, and then the first screw 3 is screwed through the first fixing hole 13 and the first threaded hole 23 in sequence to achieve assembly. When packing, the first screw 3 is removed to separate the back frame 2 and the back bracket 1. This reduces the maximum packing size, increases the container capacity, and reduces packing and transportation costs.

[0041] In this embodiment, the fixing part 12 includes a fixing part body 121 fixed to the bracket body 11, a guide groove 122 recessed inward from one end of the fixing part body 121 near the mounting part 22, and a clearance position 123 penetrating the fixing part body 121 on the side away from the bracket body 11; the clearance position 123 communicates with the guide groove 122, and the first fixing hole 13 is formed in the fixing part body 121. The mounting part 22 includes a mounting part body 221 and a connecting part 222 extending from the side of the mounting part body 221 away from the back bracket 1, and the connecting part 222 is fixed to the back frame body 21; the mounting part body 221 is disposed in the guide groove 122, and the connecting part 222 is located in the clearance position 123.

[0042] Specifically, such as Figure 9 As shown, during installation, the mounting body 221 of the back frame 2 is inserted along the guide groove 122 and abuts against the fixing body 121. Then, the first screw 3 is screwed through the first fixing hole 13 and the first threaded hole 23 in sequence to secure the assembly. Figure 10 As shown, when packing, the first screw 3 is removed, and the back frame 2 is easily disassembled by lifting it along the direction away from the fixing part body 121 of the guide groove 122. This reduces the maximum packing value, increases the container load, and reduces packing and transportation costs.

[0043] In this embodiment, the groove wall of the guide groove 122 includes two semi-circular arc sidewalls 1221 arranged opposite to each other and a flat bottom wall 1222 connecting the two semi-circular arc sidewalls 1221; the flat bottom wall 1222 is arranged opposite to the clearance position 123.

[0044] The mounting body 221 includes a cylindrical limiting rod 2211 and a flat portion 2212 formed on the side of the limiting rod 2211 near the back support 1; the first threaded hole 23 is formed on the limiting rod 2211; the two sides of the limiting rod abut against the two semi-circular sidewalls 1221 respectively, and the flat portion 2212 contacts the flat bottom wall 1222. This can improve the installation guidance accuracy of the back frame 2 and the back support 1.

[0045] Optionally, the guide groove 122 is designed in the shape of a dovetail groove to facilitate the installation of the back frame 2 and the back bracket 1.

[0046] In this embodiment, the chair back structure 100 further includes reinforcing ribs 5 fixed to the outer side of the fixing part 12, improving the structural strength of the fixing part 12. The back frame 2 also includes a groove 6 formed by the recess of the back frame body 21 from the side near the back support 1 towards the side away from the back support 1, the groove 6 being located on opposite sides of the mounting part 22; the reinforcing ribs 5 are disposed within the groove 6. This facilitates the assembly of the reinforcing ribs 5 and saves installation space.

[0047] In this embodiment, the chair back structure 100 further includes a support portion 7 fixed to the bracket body 11 and located between the two fixing portions 12, and the support portion 7 is provided with a second fixing hole 73 passing through it.

[0048] The chair back structure 100 further includes a limiting groove 24 recessed into one side of the back frame body 21 and a second threaded hole 25 penetrating the groove wall of the limiting groove 24; the end of the support part 7 away from the bracket body 11 is disposed in the limiting groove 24, and the support part 7 and the back frame body 21 are fixedly connected by a second screw 4 passing through the second fixing hole 73 and the second threaded hole 25 in sequence. This further enhances the fixing effect of the back frame 2 and the back bracket 1 and improves the overall stability.

[0049] In this embodiment, the limiting groove 24 is a semi-circular arc structure; the support part 7 includes a support part body 71 formed on the bracket body 11 and a semi-circular arc part 72 formed by extending from the support part body 71 toward one end close to the back frame 2, the second fixing hole 73 is formed in the semi-circular arc part 72, and the semi-circular arc part 72 is disposed in the semi-circular arc groove.

[0050] In this embodiment, the chair back structure 100 further includes a first support plate 8 fixed to the support body 11 and located on one side of the support portion 7, and a second support plate 9 fixed to the back frame body 21 and located on the side of the limiting groove 24 near the back support 1; the first support plate 8 contacts the second support plate 9. This improves the support effect of the back frame 2 and the back support 1.

[0051] In this embodiment, the first support plate 8 includes a rectangular frame 81 and a plurality of partitions 82 spaced apart within the frame 81; the second support plate 9 is disposed on the upper surface of the frame 81.

[0052] In this embodiment, the support portion 7 includes two parts, which are respectively spaced apart between the two fixing portions 12. The limiting groove 24 includes two parts, which are respectively disposed between the two mounting portions 22; each support portion 7 is disposed within one of its limiting grooves 24. This increases overall stability.

[0053] In this embodiment, both the first screw 3 and the second screw 4 are M6 socket head cap screws.

[0054] Example 2

[0055] This utility model embodiment provides a seat, including the aforementioned backrest structure 100. It is easy to install and comfortable to use.

[0056] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0057] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this utility model, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this utility model.

[0058] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A chair back structure comprising a back support and a back frame mounted on the back support, the back support and the back frame being located in two different planes; characterized in that, the back support comprises a support body in a ring shape, at least two fixing portions formed by extending from one side of the support body towards the back frame, and a first fixing hole passing through each of the fixing portions; the two fixing portions are arranged in a spaced manner; the back frame comprises a frame body in a ring shape, at least two mounting portions formed by extending from one side of the frame body, and a first threaded hole formed in each of the mounting portions; the fixing portion and the mounting portion are arranged in a facing manner and are fixed by a first screw passing through the first fixing hole and the first threaded hole in sequence.

2. The chair back structure of claim 1, wherein the fixing portion comprises a fixing portion body fixed to the support body, a guide groove formed by recessing from one end of the fixing portion body towards the mounting portion, and an avoiding position passing through the fixing portion body away from the support body; the avoiding position is in communication with the guide groove, and the first fixing hole is formed in the fixing portion body; the mounting portion comprises a mounting portion body and a connecting portion formed by extending from one side of the mounting portion body away from the back support, and the connecting portion is fixed to the frame body; the mounting portion body is arranged in the guide groove, and the connecting portion is located in the avoiding position.

3. The chair back structure of claim 2, wherein, the groove wall of the guide groove comprises two oppositely arranged semicircular side walls and a flat bottom wall connecting the two semicircular side walls; the flat bottom wall is arranged opposite to the avoiding position; the mounting portion body comprises a limiting rod in a cylindrical shape and a flat portion formed on one side of the limiting rod close to the back support; the first threaded hole is formed in the limiting rod; the two sides of the limiting rod abut against the two semicircular side walls respectively, and the flat portion is in contact with the flat bottom wall.

4. The chair back structure of claim 1, wherein, the chair back structure further comprises a reinforcing rib fixed to the outside of the fixing portion; the back frame further comprises a groove formed by recessing from one side of the frame body close to the back support away from the back support, and the groove is located on the opposite sides of the mounting portion; the reinforcing rib is arranged in the groove.

5. The chair back structure of claim 1, wherein, the chair back structure further comprises a supporting portion fixed to the support body and located between the two fixing portions, and the supporting portion is provided with a second fixing hole passing therethrough; the chair back structure further comprises a limiting groove recessed in one side of the frame body and a second threaded hole passing through the groove wall of the limiting groove; one end of the supporting portion away from the support body is arranged in the limiting groove, and the supporting portion and the frame body are fixed and connected by a second screw passing through the second fixing hole and the second threaded hole in sequence.

6. The chair back structure of claim 5, wherein, the limiting groove is in a semicircular arc structure; the supporting portion comprises a supporting portion body formed on the support body and a semicircular arc portion formed by extending from one end of the supporting portion body close to the back frame; the second fixing hole is formed in the semicircular arc portion, and the semicircular arc portion is arranged in the semicircular arc groove.

7. The chair back structure of claim 5, wherein The chair back structure further comprises a first support plate fixed to the support body and located at one side of the support part, and a second support plate fixed to the back frame body and located at one side of the limiting groove close to the back support.

8. The chair back structure of claim 7, wherein, The first support plate comprises a rectangular frame and a plurality of partition plates arranged in the frame.

9. The chair back structure of claim 5, wherein, The support part comprises two, and is arranged between the two fixing parts respectively. The limiting groove comprises two, and is arranged between the two mounting parts respectively.

10. A seat, characterized by The chair back structure comprises a back frame body and a back support fixed to the back frame body. The back frame body comprises a back frame and a plurality of fixing parts arranged on the back frame. The back support comprises a support body and a plurality of mounting parts arranged on the support body. The support part comprises two, and is arranged between the two fixing parts respectively. The limiting groove comprises two, and is arranged between the two mounting parts respectively. The chair back structure comprises a back frame body and a back support fixed to the back frame body. The back frame body comprises a back frame and a plurality of fixing parts arranged on the back frame. The back support comprises a support body and a plurality of mounting parts arranged on the support body. The support part comprises two, and is arranged between the two fixing parts respectively. The limiting groove comprises two, and is arranged between the two mounting parts respectively. The chair back structure comprises a back frame body and a back support fixed to the back frame body. The back frame body comprises a back frame and a plurality of fixing parts arranged on the back frame. The back support comprises a support body and a plurality of mounting parts arranged on the support body. The support part comprises two, and is arranged between the two fixing parts respectively. The limiting groove comprises two, and is arranged between the two mounting parts respectively. The chair back structure comprises a back frame body and a back support fixed to the back frame body. The back frame body comprises a back frame and a plurality of fixing parts arranged on the back frame. The back support comprises a support body and a plurality of mounting parts arranged on

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