Backrest connecting piece

Abstract

The utility model discloses a backrest connecting piece which comprises a metal plate and a plastic piece, two ends of the metal plate are respectively provided with a mounting plate portion and a connecting plate portion, the plastic piece is formed on the connecting plate portion in an injection molding mode, and the plastic piece comprises a first connecting portion and a second connecting portion which are integrally connected. One end of the first connecting part is arranged on the connecting plate part, and the second connecting part is arranged at the other end of the first connecting part and obliquely extends upwards towards the metal plate from bottom to top; thus, through the design of all the components, the plastic part is formed on the metal plate in an injection molding mode, then the metal plate is connected with the chair, the use that a traditional backrest connecting piece is integrally made of plastic is omitted, the connecting strength between the backrest connecting piece and the chair is improved, the structural design is ingenious and reasonable, the service life is long, the usability is good, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technology of the seat field, in particular to a backrest connecting piece. Background Art

[0002] In daily life and office places, chairs are currently a widely used office supplies. With the improvement of people's living standards, people pay more attention to the comfort of seats. The majority of seat manufacturers continue to improve them to have more functions to meet people's needs for seat comfort. For example, backrest chairs, lifting chairs, etc., the emergence of these products is very popular in the market; currently, seats usually include a chair and a backrest, and a backrest connector is provided between the chair and the backrest to connect the chair and the backrest together.

[0003] The existing backrest connector is made of plastic as a whole, and the backrest connector is integrally formed by an injection mold, and is connected and fixed to the chair and the backrest by screw connection. However, the structure of the backrest connector is poor. The backrest connector usually includes a first connection part for connecting to the chair and a second connection part for connecting to the backrest. Since the backrest connector is made of plastic as a whole, the connection strength between the first connection part and the chair is poor. When the user leans back against the backrest, the backward force will easily cause the first connection part to break and be damaged after long-term use, causing the backrest to fall off. The service life is short, the usability is poor, and the scope of application is small.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a backrest connector, which, through the design of various components, utilizes plastic parts to be injection molded on a metal plate, and then connects the metal plate to the chair, thereby eliminating the use of traditional backrest connectors that are made of plastic as a whole, so as to improve the connection strength between the backrest connector and the chair. The structural design is ingenious and reasonable, the service life is long, the usability is good, and the scope of application is wide.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A backrest connector includes a metal plate and a plastic part, wherein the two ends of the metal plate are respectively provided with a mounting plate part and a connecting plate part, and the plastic part is formed on the connecting plate part by injection molding. The plastic part includes a first connecting part and a second connecting part which are connected in an integral manner, wherein one end of the first connecting part is arranged on the connecting plate part, and the second connecting part is arranged at the other end of the first connecting part to extend obliquely upward from bottom to top toward the metal plate.

[0008] As a preferred embodiment, the second connecting portion includes a V-shaped edge, a first connecting edge and a second connecting edge. The lower end of the V-shaped edge is arranged on the other end of the first connecting portion. Two first connecting edges are arranged, and the two first connecting edges are respectively extended upward from the upper end of the V-shaped edge. The second connecting edge is arranged at the upper ends of the two first connecting edges.

[0009] As a preferred solution, both the first connecting edge and the second connecting edge have a first groove extending backwards, a first connecting column for connecting to a backrest is arranged in the first groove, and a first connecting hole is arranged on the first connecting column.

[0010] As a preferred solution, a second groove for positioning with a backrest is provided at the upper section of the V-shaped edge, a second connecting column for connecting with the backrest is provided in the second groove, and a second connecting hole is provided on the second connecting column.

[0011] As a preferred solution, the mounting plate portion is provided with mounting holes for assembly and connection with the seat.

[0012] As a preferred solution, the connecting plate portion is provided with positioning holes for positioning with the mold, so that the plastic part can be formed on the connecting plate portion after the metal plate is positioned in the mold.

[0013] As a preferred solution, the connecting plate portion includes a first plate portion, a second plate portion, and a third plate portion which are connected in sequence, the first plate portion and the third plate portion are both transverse plates, the second plate portion is an oblique plate, the first plate portion extends backward from the rear end of the mounting plate portion, the second plate portion extends obliquely upward from the front to the rear from the rear end of the first plate portion, and the third plate portion extends backward from the upper end of the second plate portion.

[0014] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly adopts the design of various components, utilizes plastic parts to be injection molded on a metal plate, and then connects the metal plate to the chair, thereby eliminating the use of the traditional backrest connecting part as a whole of plastic, so as to improve the connection strength between the backrest connecting part and the chair. The structural design is ingenious and reasonable, the service life is long, the usability is good, and the application range is wide;

[0015] Secondly, the setting of the first groove facilitates the connection and positioning between the plastic part and the backrest, and the assembly is convenient. At the same time, the setting of the second groove is conducive to the assembly and positioning between the plastic part and the backrest, thereby improving the assembly efficiency of the product, making the operation simple and practical.

[0016] In addition, the setting of the positioning holes utilizes the positioning holes and the positioning structure of the mold for connection and positioning, thereby ensuring the accurate positioning of the metal plate in the mold and the injection molding operation of the plastic parts on the metal plate with a high yield rate, which is convenient for subsequent automated production. At the same time, the setting of the first to third plate parts improves the structural strength between the metal plate and the plastic parts, which is beneficial to improving the service life of the product.

[0017] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional view of an embodiment of the present utility model.

[0020] Description of the accompanying drawings:

[0021] 10. Metal plate 11. Mounting plate

[0022] 111, mounting hole 12, connecting plate

[0023] 121, first plate portion 122, second plate portion

[0024] 123, third plate portion 13, positioning hole

[0025] 20. Plastic part 21. First connecting part

[0026] 22. Second connecting portion 221. V-shaped edge

[0027] 222, first connecting edge 223, second connecting edge

[0028] 23. First groove 231, first connecting column

[0029] 232, first connecting hole 24, second groove

[0030] 241. Second connecting column 242. Second connecting hole. DETAILED DESCRIPTION

[0031] Please refer to Figure 1 to Figure 2 As shown, it shows the specific structure of an embodiment of the utility model.

[0032] A backrest connector, comprising a metal plate 10 and a plastic part 20, wherein the two ends of the metal plate 10 are respectively provided with a mounting plate part 11 and a connecting plate part 12, wherein the plastic part 20 is formed on the connecting plate part 12 by injection molding, and wherein the plastic part 20 comprises a first connecting part 21 and a second connecting part 22 which are connected in an integral manner, wherein one end of the first connecting part 21 is provided on the connecting plate part 12, and the second connecting part 22 is provided at the other end of the first connecting part 21 and extends obliquely upward from bottom to top toward the metal plate 10;

[0033] In this embodiment, the second connecting portion 22 includes a V-shaped edge 221, a first connecting edge 222 and a second connecting edge 223. The lower end of the V-shaped edge 221 is arranged on the other end of the first connecting portion 21. Two first connecting edges 222 are arranged. The two first connecting edges 222 are respectively extended upward from the upper end of the V-shaped edge 221. The second connecting edge 223 is arranged at the upper ends of the two first connecting edges 222. In this way, through the design of each component, plastic parts are injection molded on a metal plate, and then the metal plate is connected to the chair, the use of traditional backrest connectors made of plastic as a whole is eliminated to improve the connection strength between the backrest connector and the chair. The structural design is ingenious and reasonable, with a long service life, good usability, and a wide range of applications.

[0034] Specifically, the first connecting edge 222 and the second connecting edge 223 both have a first groove 23 extending backward, a first connecting column 231 for connecting to the backrest is provided in the first groove 23, and a first connecting hole 232 is provided on the first connecting column 231, so as to facilitate the connection and positioning between the plastic part and the backrest and facilitate assembly.

[0035] In addition, the upper part of the V-shaped edge 221 is provided with two symmetrical second grooves 24 for positioning with the backrest, the second grooves 24 are provided with second connecting columns 241 for connecting with the backrest, and the second connecting columns 241 are provided with second connecting holes 242. This is beneficial to the assembly positioning between the plastic part and the backrest, improves the assembly efficiency of the product, is simple to operate, and has strong practicality.

[0036] In addition, the mounting plate portion 11 is provided with a mounting hole 111 for connecting to the seat assembly, and the connecting plate portion 12 is provided with a positioning hole 13 for positioning with the mold, so that the plastic part can be molded on the connecting plate portion after the metal plate is positioned in the mold. In this way, the positioning hole and the positioning structure of the mold are used for connection and positioning, which ensures that the metal plate is accurately positioned in the mold and the injection molding operation of the plastic part on the metal plate is guaranteed with a high yield rate, so as to facilitate subsequent automated production.

[0037] Preferably, the connecting plate 12 includes a first plate portion 121, a second plate portion 122, and a third plate portion 123 which are connected in sequence, the first plate portion 121 and the third plate portion 123 are both transverse plates, the second plate portion 122 is an oblique plate, the first plate portion 121 extends backward from the rear end of the mounting plate portion 11, the second plate portion 122 extends obliquely upward from the rear end of the first plate portion 121 from the front to the back, the third plate portion 123 extends backward from the upper end of the second plate portion 122, and the positioning hole 13 is provided on the third plate portion 123. In this way, the provision of the first to third plate portions improves the structural strength between the metal plate and the plastic part, which is beneficial to improving the service life of the product.

[0038] The design focus of the utility model is that it mainly uses the design of various components, uses plastic parts to be injection molded on a metal plate, and then connects the metal plate to the chair, eliminating the use of traditional backrest connecting parts that are entirely plastic, so as to improve the connection strength between the backrest connecting parts and the chair. The structural design is ingenious and reasonable, has a long service life, good usability, and a wide range of applications.

[0039] Secondly, the setting of the first groove facilitates the connection and positioning between the plastic part and the backrest, and the assembly is convenient. At the same time, the setting of the second groove is conducive to the assembly and positioning between the plastic part and the backrest, thereby improving the assembly efficiency of the product, making the operation simple and practical.

[0040] In addition, the setting of the positioning holes utilizes the positioning holes and the positioning structure of the mold for connection and positioning, thereby ensuring the accurate positioning of the metal plate in the mold and the injection molding operation of the plastic parts on the metal plate with a high yield rate, which is convenient for subsequent automated production. At the same time, the setting of the first to third plate parts improves the structural strength between the metal plate and the plastic parts, which is beneficial to improving the service life of the product.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A backrest connector, characterized in that: It includes a metal plate and a plastic part, wherein the two ends of the metal plate are respectively provided with a mounting plate part and a connecting plate part, the plastic part is molded on the connecting plate part by injection molding, and the plastic part includes a first connecting part and a second connecting part which are connected in an integral manner, wherein one end of the first connecting part is arranged on the connecting plate part, and the second connecting part is arranged at the other end of the first connecting part to extend obliquely upward from bottom to top toward the metal plate.

2. A backrest connector according to claim 1, characterized in that: The second connecting portion includes a V-shaped edge, a first connecting edge and a second connecting edge. The lower end of the V-shaped edge is arranged on the other end of the first connecting portion. Two first connecting edges are arranged. The two first connecting edges are respectively extended upward from the upper end of the V-shaped edge. The second connecting edge is arranged at the upper ends of the two first connecting edges.

3. A backrest connector according to claim 2, characterized in that: The first connecting edge and the second connecting edge both have a first groove extending backwards, a first connecting column for connecting with a backrest is arranged in the first groove, and a first connecting hole is arranged on the first connecting column.

4. A backrest connector according to claim 2, characterized in that: The upper section of the V-shaped edge is provided with a second groove for positioning with the backrest, the second groove is provided with a second connecting column for connecting with the backrest, and the second connecting column is provided with a second connecting hole.

5. The backrest connector according to claim 1, characterized in that: The mounting plate portion is provided with mounting holes for being assembled and connected with the seat.

6. A backrest connector according to claim 1, characterized in that: The connecting plate portion is provided with a positioning hole for positioning with the mold, so that the plastic part can be formed on the connecting plate portion after the metal plate is positioned in the mold.

7. The backrest connector according to claim 1, characterized in that: The connecting plate portion includes a first plate portion, a second plate portion, and a third plate portion which are connected in sequence, the first plate portion and the third plate portion are both transverse plates, the second plate portion is an oblique plate, the first plate portion extends backward from the rear end of the mounting plate portion, the second plate portion extends obliquely upward from the front to the rear from the rear end of the first plate portion, and the third plate portion extends backward from the upper end of the second plate portion.

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