Chair back connecting piece

Abstract

A chair back connecting piece is provided with a connecting main body, a first spiral piece and a second spiral piece, one end of the connecting main body is provided with a first connecting thread, and the other end of the connecting main body is provided with a second connecting thread; internal threads are respectively arranged on the inner walls of the first spiral piece and the second spiral piece; a first perforated section and a second perforated section are arranged in the connecting body, the first perforated section is located at the end where the first connecting threads are located, and the second perforated section is located at the end where the second connecting threads are located; the diameter of the first perforation section is larger than that of the second perforation section, and the part, protruding towards the interior of the connecting body relative to the first perforation section, of the second perforation section forms a limiter. A chair cushion support supporting pipe to be connected is inserted into the first perforated section, and a chair back connecting pipe of a chair back support to be connected is inserted into the second perforated section and is inserted into the chair cushion support supporting pipe. The connecting effect of conventional screws is replaced, and the chair back is more convenient to connect and adjust.

Description

Technical Field

[0001] The utility model relates to the field of seats, in particular to a chair back connector. Background Art

[0002] The backrest of an ergonomic chair often requires an adjustably connected seat cushion bracket. One feasible connection method involves providing support tubes on the left and right sides of the seat cushion bracket in a front-to-back direction, and a seat back connecting tube extending forward from the bottom of the seat back bracket. The seat back connecting tube is inserted into the support tube, and holes or slots are provided in the support tube. These holes or slots contain fixing screws that screw into threaded holes in the seat back connecting tube to secure the relative position of the seat back connecting tube and the support tube. When adjustment is required, the screws are removed to allow the seat back connecting tube to move freely within the support tube. However, this screw positioning method generally requires pre-drilling during production. Because the bracket is a sheet metal structure, the holes may be misaligned during drilling. In particular, the pre-set holes or threaded holes in the seat back connecting tube for the screws are easily misaligned due to the large sheet metal tolerances and the bracket's elastic deformation. This makes the holes difficult to install and inconvenient when adjusting the seat back. Utility Model Content

[0003] In view of the above situation, in order to solve the problems existing in the above technology, the utility model proposes a chair back connector, which is provided with a connecting body, a first screw and a second screw, and the connecting body is provided with a first connecting thread at one end and a second connecting thread at the other end; the inner walls of the first screw and the second screw are respectively provided with internal threads, and the first screw and the second screw are respectively fixed on the first connecting thread and the second connecting thread through threaded connection; a first perforated section and a second perforated section are provided inside the connecting body, the first perforated section is located at the end where the first connecting thread is located, and the second perforated section is located at the end where the second connecting thread is located; the diameter of the first perforated section is larger than the diameter of the second perforated section, and the part of the second perforated section protruding toward the inside of the connecting body relative to the first perforated section constitutes a limiter; the support tube of the seat cushion bracket to be connected is inserted into the first perforated section, and the seat back connecting tube of the seat back bracket to be connected is inserted into the second perforated section and inserted into the seat cushion bracket support tube.

[0004] According to a seat back connector of the present application, the outer wall diameter of the seat cushion bracket support tube is smaller than the diameter of the first perforated section and larger than the diameter of the second perforated section, and the outer wall diameter of the seat back connecting tube is smaller than the diameter of the second perforated section and smaller than the inner wall diameter of the seat cushion bracket support tube.

[0005] According to a chair back connector of the present application, the end plane of the seat cushion bracket support tube is pressed against the limiting plane of the limiter.

[0006] According to a chair back connector of the present application, the outer end of the first connecting thread is provided with a plurality of first elastic claws for clamping the seat cushion bracket support tube when subjected to external pressure, and the inner wall of the first spiral component is provided with a tightening slope at the end where the first elastic claws are located for pressing the first elastic claws when the first spiral component is screwed in.

[0007] According to a chair back connector of the present application, the outer end of the second connecting thread is provided with a plurality of second elastic claws for clamping the chair back connecting tube when subjected to external pressure, and the inner wall of the second spiral is provided with a tightening slope at the end where the second elastic claws are located for tightening the second elastic claws when the second spiral is screwed in.

[0008] According to a chair back connector of the present application, a first outer ring and a second outer ring are further provided on the outer wall of the connecting body, and a connecting portion is provided between the first outer ring and the second outer ring.

[0009] After adopting the technology proposed by the present invention, the chair back connector according to the embodiment of the present invention has the following beneficial effects.

[0010] 1) The connection of the main body, the first screw, the second screw, the cushion bracket support tube and the seat back connecting tube not only replaces the connection function of conventional screws, but also makes the connection and adjustment of the seat back more convenient.

[0011] 2) It is easier for users to use than the original structure connected with screws. The original screw connection required drilling holes on the steel pipe, and the hole positions would deviate, resulting in misalignment of the holes during installation, making installation difficult. However, after switching to the structure of this application, as long as the threads are aligned, it is easier and more comfortable to screw in. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of a chair back connector according to the present application;

[0013] Figure 2 This is a schematic diagram of the internal structure of a chair back connector according to the present application;

[0014] Figure 3 A structural diagram of a connecting body in a chair back connector according to the present application;

[0015] Figure 4 This is a schematic diagram of the assembly structure of a chair back connector according to the present application.

[0016] In the figure,

[0017] Connecting body 1

[0018] First perforated section 101

[0019] Second perforated section 102

[0020] First connecting thread 11

[0021] First elastic claw 110

[0022] Second connecting thread 12

[0023] Second elastic claw 120

[0024] First spiral member 2

[0025] Second spiral member 3

[0026] Limiter 40

[0027] Limiting plane 41

[0028] Seat cushion bracket support tube 5

[0029] Backrest bracket 6

[0030] Seat back connecting pipe 61

[0031] Pressing slope 70

[0032] Connecting portion 81

[0033] First Outer Ring 82

[0034] Second Outer Ring 83 DETAILED DESCRIPTION

[0035] Various preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The following description with reference to the accompanying drawings is provided to facilitate understanding of the exemplary embodiments of the present invention as defined by the claims and their equivalents. It includes various specific details to aid understanding, but they are to be considered as illustrative only. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Moreover, for the sake of clarity and brevity, detailed descriptions of functions and structures well known in the art will be omitted.

[0036] like Figure 1-4As shown, a seat back connector is provided with a connecting body 1, a first screw member 2 and a second screw member 3, one end of the connecting body 1 is provided with a first connecting thread 11, and the other end is provided with a second connecting thread 12; the inner walls of the first screw member 2 and the second screw member 3 are respectively provided with internal threads, and the first screw member 2 and the second screw member 3 are respectively sleeved and fixed on the first connecting thread 11 and the second connecting thread 12 by threaded connection; a first perforated section 101 and a second perforated section 102 are provided inside the connecting body 1, the first perforated section 101 is located at the end where the first connecting thread 11 is located, and the second perforated section 102 is located at the end where the second connecting thread 12 is located; the diameter of the first perforated section 101 is larger than the diameter of the second perforated section 102, and the part of the second perforated section 102 protruding toward the inside of the connecting body 1 relative to the first perforated section 101 constitutes a limiter 40; the seat cushion bracket support tube 5 to be connected is inserted into the first perforated section 101, and the seat back connecting tube 61 of the seat back bracket 6 to be connected is inserted into the second perforated section 102 and inserted into the seat cushion bracket support tube 5.

[0037] The outer wall diameter of the seat cushion bracket support tube 5 is smaller than the diameter of the first perforated section 101 and larger than the diameter of the second perforated section 102 , and the outer wall diameter of the seat back connecting tube 61 is smaller than the diameter of the second perforated section 102 and smaller than the inner wall diameter of the seat cushion bracket support tube 5 .

[0038] The end plane of the seat cushion bracket support tube 5 is pressed against the limiting plane 41 of the limiter 40 .

[0039] The outer end of the first connecting thread 11 is provided with a plurality of first elastic claws 110 for clamping the seat cushion bracket support tube 5 when subjected to external pressure, and the inner wall of the first spiral member 2 is provided with a clamping slope 70 at the end where the first elastic claws 110 are located for clamping the first elastic claws 110 when the first spiral member 2 is screwed in.

[0040] The outer end of the second connecting thread 12 is provided with a plurality of second elastic claws 120 for clamping the chair back connecting tube 61 when subjected to external pressure, and the inner wall of the second screw member 3 is provided with a tightening inclined surface 70 at the end where the second elastic claws 120 are located for tightening the second elastic claws 120 when the second screw member 3 is screwed in.

[0041] A first outer ring 82 and a second outer ring 83 are further provided on the outer wall of the connecting body 1 , and a connecting portion 81 is provided between the first outer ring 82 and the second outer ring 83 .

[0042] The connecting portion 81, on the one hand, serves to connect the end of the first connecting thread 11 with the end of the second connecting thread 12, and, on the other hand, serves to provide a grip for applying force when tightening the first screw member 2 and the second screw member 3. The first outer ring 82 and the second outer ring 83, in conjunction with the connecting portion 81, on the one hand, strengthen the aforementioned grip for applying force when tightening the first screw member 2 and the second screw member 3, and, on the other hand, serves to limit the screw-in positions of the first screw member 2 and the second screw member 3, respectively, to avoid damage caused by improper force application or inconvenience in subsequent adjustment caused by over-tightening.

[0043] According to a chair back connector of the present application, when adjusting the chair back, after the first and second screws 3 are loosened, the steel pipe of the chair back connecting tube 61 can be pulled forward and backward. After adjusting the position, the first and second screws 3 can be tightened. There is a limiter inside the connecting body. After it is installed, it cannot be pushed inward. This ensures that the chair back connector and the seat cushion bracket support tube always maintain the closest connection distance, thereby ensuring structural stability and preventing the connecting body from being subjected to a large amount of overhanging force, thereby improving product life. The chair back connecting tube 61 of the chair back bracket 6 is inserted into the second perforated section 102 and inserted into the seat cushion bracket support tube 5, which can ensure that its force-bearing area is large and the force-bearing length is long, thereby better supporting the chair back and improving product quality.

[0044] The chair back connector of the present application, through the cooperation of a connecting body 1, a first screw member, a second screw member 3, a seat cushion bracket support tube 5, and a chair back connecting tube 61, not only replaces the connection function of conventional screws, but also makes the connection and adjustment of the chair back more convenient. It is more user-friendly than the original screw connection structure. The original screw connection requires drilling holes in the steel pipe, and the hole position may deviate, resulting in misalignment during installation and difficulty. However, with the structure of the present application, once the threads are aligned, screwing in is relatively easy and effortless.

[0045] The above is a detailed introduction to the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there may be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

[0046] Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented. Of course, the above-listed situations are only examples, and the present invention is not limited thereto. Those skilled in the art should understand that other variations or simplifications of the technical solution of the present invention can be appropriately applied to the present invention and should be included in the scope of the present invention.

Claims

1. A chair back connector, characterized in that: A connecting body (1), a first spiral member (2) and a second spiral member (3) are provided, wherein one end of the connecting body (1) is provided with a first connecting thread (11), and the other end is provided with a second connecting thread (12); the inner walls of the first spiral member (2) and the second spiral member (3) are respectively provided with internal threads, and the first spiral member (2) and the second spiral member (3) are respectively sleeved and fixed on the first connecting thread (11) and the second connecting thread (12) through threaded connection; a first perforated section (101) and a second perforated section (102) are provided inside the connecting body (1), and the first perforated section (101) is located at the first connecting thread ( 11) is located at the end where the second perforated section (102) is located; the diameter of the first perforated section (101) is larger than the diameter of the second perforated section (102), and the part of the second perforated section (102) protruding toward the inside of the connecting body (1) relative to the first perforated section (101) constitutes a limiter (40); the seat cushion bracket support tube (5) to be connected is inserted into the first perforated section (101), and the seat back connecting tube (61) of the seat back bracket (6) to be connected is inserted into the second perforated section (102) and inserted into the seat cushion bracket support tube (5).

2. The chair back connector according to claim 1, characterized in that: The outer wall diameter of the seat cushion bracket support tube (5) is smaller than the diameter of the first perforated section (101) and larger than the diameter of the second perforated section (102), and the outer wall diameter of the seat back connecting tube (61) is smaller than the diameter of the second perforated section (102) and smaller than the inner wall diameter of the seat cushion bracket support tube (5).

3. The chair back connector according to claim 1, characterized in that: The end plane of the seat cushion bracket support tube (5) is pressed against the limiting plane (41) of the limiter (40).

4. The chair back connector according to claim 1, characterized in that: The outer end of the first connecting thread (11) is provided with a plurality of first elastic claws (110) for clamping the seat cushion bracket support tube (5) when subjected to external pressure, and the inner wall of the first spiral member (2) is provided with a pressing inclined surface (70) at the end where the first elastic claws (110) are located for pressing the first elastic claws (110) when the first spiral member (2) is screwed in.

5. The chair back connector according to claim 1, characterized in that: The outer end of the second connecting thread (12) is provided with a plurality of second elastic claws (120) for clamping the chair back connecting tube (61) when subjected to external pressure, and the inner wall of the second spiral member (3) is provided with a pressing inclined surface (70) at the end where the second elastic claws (120) are located for pressing the second elastic claws (120) when the second spiral member (3) is screwed in.

6. The chair back connector according to claim 1, characterized in that: A first outer ring (82) and a second outer ring (83) are further provided on the outer wall of the connecting body (1), and a connecting portion (81) is provided between the first outer ring (82) and the second outer ring (83).

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