Simple seat and production method

Abstract

The invention provides a simple seat and a production method. The seat comprises a chair back assembly, and the chair back assembly comprises a backrest part and an armrest part which are both made of plastics and are detachably connected; a first groove, a second groove, a third groove and a fourth groove are formed in the ends, close to each other, of the backrest piece and the armrest piece, the first groove and the second groove are located in the backrest piece, the first groove is located on the inner side of the second groove, and similarly, the third groove and the fourth groove are correspondingly formed in the armrest piece; the four grooves are located at the same height and provided with opposite openings, the first groove and the third groove are aligned and then communicated to jointly form a first mounting groove, similarly, the second groove and the fourth groove respond to form a second mounting groove, and a first connecting piece and a second connecting piece are arranged in the first mounting groove and the second mounting groove respectively; the production method comprises the steps that after the backrest piece and the armrest piece are subjected to blow molding, the backrest piece and the armrest piece are aligned to form the mounting groove, and finally the backrest connecting frame and the armrest piece are connected through fixed connection of the two connecting pieces.

Description

Technical Field

[0001] The invention relates to the field of furniture, and in particular to a simple chair and a production method thereof. Background Art

[0002] As one of the most common furniture, seats are of various types. Different types of seats target the needs of different consumers. Some consumers focus mainly on the appearance, some consumers focus mainly on the functions of the seats, and of course there are also consumers who pay more attention to cost performance. Therefore, there are expensive and functional seats, as well as lower-priced but designer seats. They all occupy a place in the market and have their own market competition.

[0003] The simple chairs on the market have a relatively simple structure, so the production cost is relatively low, thereby forming market competitiveness through low pricing. However, the existing simple chairs basically use steel and wooden structures as the basis. Simple chairs with steel structures are often connected by multiple steel pipes to form a seat frame, while seats with wooden structures can be formed into components with better integrity through template processing. Therefore, seats with wooden structures are more beautiful and more competitive in the market than seats with steel structures. The structure of a simple chair with wooden structure is as follows: it has an integrally formed U-shaped wooden board, which forms the backrest of the seat and the armrests on both sides of the backrest, and the board is directly connected to the seat.

[0004] In order to further reduce costs, lightweight and cheap plastic panels can be used instead of wooden boards. However, if plastic is to be molded into U-shaped panels of the same shape, it is not only difficult but also has high mold opening costs. The produced U-shaped panels are not convenient for packaging and transportation, and occupy and waste a lot of space, which will greatly increase the cost of packaging and transportation. If multiple plastic panels are spliced ​​into the same shape, although the above problems can be solved, due to the low strength of plastic, the backrest and armrests formed after splicing are easily damaged by force at the joints of the plastic panels during use.

[0005] To sum up, it is difficult to find a perfect solution to use plastic panels instead of wooden boards to produce a simple chair that is lower in cost, simple and beautiful, and has a high-end feel. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the present invention provides a simple chair, including a backrest assembly, which includes a backrest member and an armrest member, both of which are plastic. The two are detachably connected, which is convenient for packaging and transportation when disassembled, with low cost, and can be used after assembly; the backrest member and the armrest member are provided with a first, second, third, and fourth grooves at the ends close to each other, the first groove and the second groove are located on the backrest member and the first groove is located on the inner side of the second groove, and similarly, the third and fourth grooves are correspondingly arranged on the armrest member; the four grooves are all at the same height and have opposite openings, wherein the first groove and the third groove are connected after being aligned and jointly form a first installation groove, and similarly, the second groove and the fourth groove respond to form a second installation groove, and a first connecting member and a second connecting member are respectively arranged in the first installation groove and the second installation groove, and the two connecting members lock and connect the armrest member and the backrest member.

[0007] A production method for the above-mentioned simple chair is further provided, which includes first blow-molding a plastic into a backrest member and an armrest member having the above-mentioned grooves, then aligning the backrest member and the armrest member to form an installation groove, and finally arranging a first and a second connecting member in the first and the second installation grooves, and connecting the backrest connecting frame to the armrest member by fixedly connecting the two connecting members.

[0008] The technical solution of the present invention is achieved in this way: A simple chair comprises a chair back assembly, the chair back assembly comprises a backrest member and an armrest member, both of which are plastic, the backrest member and the armrest member are detachably connected; the backrest member is provided with at least one pair of first grooves and second grooves at the end close to the armrest member, the first groove is located on the inner side of the second groove; the armrest member is provided with at least one pair of third grooves and fourth grooves at the end close to the backrest member, the third groove is located on the inner side of the fourth groove, the first, second, third and fourth grooves are all at the same height, and the four are all provided with openings facing each other; the first groove is aligned with the third groove and together forms a first mounting groove, the second groove is aligned with the fourth groove and together forms a second mounting groove, a first connecting member is provided in the first mounting groove, a second connecting member is provided in the second mounting groove, the first connecting member and the second connecting member are fixedly connected from the inside-outside direction to lock the armrest member and the backrest member.

[0009] The backrest assembly including the backrest and the armrest is used to support the back of the human body and can also be used as an armrest to support the arms of the human body in the simple chair; the backrest and the armrest are detachably connected, which is convenient for packaging and transportation after disassembly, so as to reduce the cost of packaging and transportation; the grooves on the backrest and the armrest, wherein two adjacent grooves have opposite openings, are connected as a whole after alignment, so as to form a mounting groove, in which the connecting piece is just sunk for connection, and the connecting piece is hidden in the mounting groove and will not protrude from the backrest assembly, so that the integrity of the backrest assembly is better; there are mounting grooves on both the inner and outer sides of the backrest and the armrest, and the two connecting pieces are fixedly connected to each other at the connection between the backrest and the armrest, so as to realize the connection and locking of the backrest and the armrest, and the two connecting pieces provide better connection strength, so that the backrest and the armrest will not be broken or separated during use. In summary, the backrest and the armrest are both plastic, that is, plastic parts are used to replace traditional wooden parts, which overcomes technical difficulties and makes the simple chair simple in structure, lightweight, low in production cost and transportation cost, and stable in connection.

[0010] Preferably, a first receiving groove recessed toward the second groove is provided on the groove wall of the first groove, a second receiving groove recessed toward the first groove is provided on the groove wall of the second groove, a first reinforcing convex portion is provided on the first receiving groove of the first connecting member, and a second reinforcing convex portion is provided on the second receiving groove of the second connecting member. When the connecting member is installed in the installation groove, the reinforcing convex portion enters the receiving groove and fits therewith, thereby increasing the contact area, making the force transmission area between the backrest member and the connecting member, and between the armrest member and the connecting member larger, and not easily generating stress concentration, thereby strengthening the connection strength.

[0011] Preferably, the first reinforcing protrusion and the second reinforcing protrusion are both truncated cone-shaped, and the diameters of both gradually decrease from the bottom to the outside; the first receiving groove and the second receiving groove are of corresponding shapes. The truncated cone-shaped reinforcing protrusion and the receiving groove have an inclination. Due to the existence of the inclination, the reinforcing protrusion can provide multi-directional limit after entering the receiving groove, thereby further increasing the connection strength and connection stability, and making the backrest and the connecting member more tightly connected, reducing the possibility of shaking after the two are connected.

[0012] Preferably, the first reinforcing protrusion protrudes from the first connecting member so that a first connecting groove is formed on the other side of the first connecting member. Similarly, a second connecting groove is formed on the second connecting member. Both the first connecting member and the second connecting member are iron-containing alloys. A magnet is fixed in the first connecting groove, and the magnet is configured to make the first connecting member absorb the second connecting member located outside the seat back assembly. This facilitates assembly and connection without having to press the connecting member tightly into the installation groove by hand.

[0013] Preferably, the magnet is annular, and an internal thread is provided on the inner ring wall of the magnet, the first connecting member and the second connecting member are connected by bolts, and the head of the bolt is placed in the second connecting groove.

[0014] Preferably, the groove wall of the first groove and the groove wall of the third groove are both provided with positioning grooves that are recessed toward the outside, and the first connecting member is correspondingly provided with positioning convex strips, which are arranged in the positioning grooves. The design of the positioning grooves and positioning convex strips facilitates the positioning of the connecting member and the installation groove, and further increases the connection strength.

[0015] Preferably, the strength of the first connector and the second connector is greater than that of the backrest and the armrest; the first connector and the second connector are fixedly connected by at least two fixing members arranged in the inner and outer directions, one of which passes through the first connector, the backrest and the second connector, and the other passes through the first connector, the armrest and the second connector. The fixing members are bolts, namely the first bolt and the second bolt; the backrest and the armrest are both made of plastic, which have low strength, and after the bolts are directly connected, the contact area between the bolts and the plastic parts is very small, so there is a great possibility that they will be damaged due to excessive force, and the force bearing capacity of this connection method is too weak; in this solution, the two bolts fix the two connectors while passing through the backrest and the armrest parts respectively, and the force is no longer directly transmitted from the plastic part to the bolt, but is transmitted to the bolt after passing through the connector with a larger contact area. The bolt is relatively thin, and the contact area between the connector and the bolt is also small, but the strength of the connector is higher. At the same time, since the contact area between the connector and the plastic part is larger, it is not easy to cause stress concentration and other problems that may cause damage to the plastic part, thereby greatly improving the force bearing strength.

[0016] Preferably, the first connecting member and the second connecting member are both made of metal, which has high strength and ensures the connection strength and stability between the backrest member and the armrest member.

[0017] Preferably, the backrest plate is provided with two pairs of first grooves and second grooves, and the two pairs of first grooves and second grooves are arranged at intervals up and down. There are two groups of connecting parts between the backrest and the armrest, so that the connection is more stable and the supporting capacity is strong.

[0018] Preferably, a positioning structure is provided between the armrest and the backrest, the positioning structure comprising a positioning protrusion and a positioning groove, the positioning protrusion is provided on one of the armrest or the backrest, the positioning groove is provided on the other of the armrest or the backrest, the positioning protrusion is located in the positioning groove and is configured to align the first groove with the third groove. The positioning structure facilitates the alignment and connection of the armrest and the backrest, and can also enhance the connection strength of the armrest and the backrest after they are connected.

[0019] Preferably, the first connecting member and the second connecting member each include two connecting parts located at both ends and an elastic part located between the two connecting parts, the connecting parts are used to connect the backrest member and the armrest member, and the elastic part is configured to give the backrest member the ability to float backward relative to the armrest member. The elastic part is made of elastic material such as rubber, and the connecting part is made of rigid material such as hard plastic, metal, etc., to ensure that the connection between the connecting member and the backrest member and the armrest member is sufficiently stable, and to enable the backrest member to have the ability to float. When the user lies on the backrest member, the backrest member can float backward like an office chair with a small buffer, thereby increasing comfort.

[0020] A production method for producing the simple seat as described above, comprising the following steps: S1 produces chair back components: using plastic to form independent backrest parts and armrest parts through blow molding, and forming a first groove and a second groove on the backrest part, and forming a third groove and a fourth groove on the armrest part; S2 forms the installation groove: the armrest is placed beside the backrest, and the first groove is aligned with the opening of the third groove, and the second groove is aligned with the opening of the fourth groove; the aligned first groove and the third groove form a first installation groove, and the aligned second groove and the fourth groove form a second installation groove; S3 installs the connecting member: places the first connecting member in the first installation groove, places the second connecting member in the second installation groove, and then respectively fixes the first connecting member on the backrest member and the part of the second connecting member, and fixes the first connecting member on the armrest member and the part of the second connecting member.

[0021] The backrest and armrest are blow-molded, with a thick appearance and better visual experience, and less material is used, which reduces costs. However, the strength is worse than that of solid plastic plates molded by injection molding. Therefore, a more unique method is needed to connect the backrest and the armrest. Since the blow-molded plastic parts are thicker, in view of this feature, grooves are formed on both the backrest and the armrest at the same time. The grooves have openings. After aligning the groove openings on the backrest and the armrest, the two adjacent grooves are connected to form an installation groove, which cleverly allows the connecting parts to be installed in the installation groove and hidden, achieving a better integrated visual effect. Moreover, after the connecting parts in the two installation grooves are fixedly connected to each other, the connection between the armrest and the backrest is also more stable, reducing and lowering the possibility of shaking. In addition, the production steps are simple and the production efficiency is higher.

[0022] Preferably, in step S1, a first accommodating groove is formed on the groove wall of the first groove, and a second accommodating groove is formed on the groove wall of the second groove. The grooves on the backrest and the armrest can be blow molded together, and no subsequent processing is required. Only assembly is required, which is convenient and fast to install and has high production efficiency.

[0023] The design starting point, concept and beneficial effects of the present invention using the above technical solution are: 1. The chair back assembly including the backrest and the armrest is used to support the back of the human body in the simple chair and can also be used as an armrest to support the arms of the human body; the backrest and the armrest are detachably connected, which is convenient for packaging and transportation after disassembly, so as to reduce the cost of packaging and transportation.

[0024] 2. The grooves on the backrest and the armrest, wherein two adjacent grooves have opposite openings, are connected as a whole after being aligned, and cleverly form a mounting groove, in which the connecting piece is sunk for connection. The connecting piece is hidden in the mounting groove and will not protrude from the chair back assembly, thereby making the chair back assembly more integrated.

[0025] 3. There are installation grooves on the inner and outer sides of the backrest and the armrest. The two connecting parts are fixedly connected to each other at the connection between the backrest and the armrest, so as to realize the connection and locking of the backrest and the armrest. In addition, the two connecting parts provide better connection strength, so that the backrest and the armrest will not be broken or separated during use.

[0026] 4. A receiving groove is provided on the groove wall of the groove, and a reinforcing convex portion is correspondingly provided on the connecting piece. The two connecting pieces are fixedly connected by bolts. When the chair back assembly is subjected to force, the connecting piece and the chair back assembly transmit force through the reinforcing convex portion and the receiving groove with a larger contact area, and there will be no situation in which the bolt and the chair back assembly contact and transmit force. Therefore, there will be no stress concentration problem, which reduces the possibility of damage to the backrest and the armrest at the connection, and extends the service life.

[0027] 5. The truncated cone-shaped receiving groove and the reinforcing protrusion can also make the connection between the backrest and the armrest more tightly, and there will be no shaking after the two are connected.

[0028] 6. The backrest and armrest parts are blow-molded, and no subsequent processing is required. They can be directly assembled, with simple production steps and higher production efficiency.

[0029] In summary, the backrest and armrests are both made of plastic, that is, plastic parts are used to replace traditional wooden parts, which overcomes technical difficulties and makes the simple chair structure simple, lightweight, low in production and transportation costs, and stable in connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the simple chair in Example 1 of the present invention; Figure 2 It is a schematic diagram of a three-dimensional structure in which the chair back components are connected by connecting members in Example 1 of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the chair back assembly in Example 1 of the present invention; Figure 4It is a schematic diagram of a three-dimensional structure in which a second connecting member is provided on the back of the chair back assembly in Example 1 of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the first and second connecting members in Example 1 of the present invention Figure 1 ; Figure 6 Schematic diagram of the three-dimensional structure of the first and second connecting members in Example 1 of the present invention Figure 2 ; Figure 7 is a schematic diagram of the second connecting member being connected to the seat back assembly in Embodiment 1 of the present invention; Figure 8 This is an exploded view of the backrest member, the armrest member and the connecting member in Example 1 of the present invention; Fig. 9 This is a flow chart of the method for producing the simple chair in Example 1 of the present invention; Fig.10 It is a schematic diagram of the connecting portion and the elastic portion on the first connecting member in Example 2 of the present invention; Fig.11 It is a schematic diagram of the connecting portion and the elastic portion on the second connecting member in Example 2 of the present invention.

[0031] The figures are marked as follows: chair back assembly 100; backrest member 1; armrest member 2; first groove 3; second groove 4; third groove 5; fourth groove 6; first mounting groove 8; second mounting groove 9; first connecting member 10; second connecting member 11; positioning protrusion 12; positioning groove 13; first accommodating groove 14; second accommodating groove 15; first reinforcing protrusion 16; second reinforcing protrusion 17; positioning groove 18; positioning rib 19; first connecting groove 20; second connecting groove 21; magnet 22; connecting portion 23; elastic portion 24. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0034] In the description of the present invention, the terms “first”, “second”, “third”, etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0035] The specific implementation of the present invention is as follows: Example

[0036] like Figure 1-3 As shown, the present invention provides a simple chair, including a chair back assembly 100, the chair back assembly 100 includes a backrest member 1 and an armrest member 2, both of which are plastic, and the backrest member 1 and the armrest member 2 are detachably connected; the backrest member 1 is provided with at least one pair of first grooves 3 and second grooves 4 at the end close to the armrest member 2, and the first groove 3 is located on the inner side of the second groove 4; the armrest member 2 is provided with at least one pair of third grooves 5 and fourth grooves 6 at the end close to the backrest member 1, and the third groove 5 is located on the inner side of the fourth groove 6, the first, second, third, and fourth grooves 6 are all at the same height, and the four are all provided with openings in opposite directions; the first groove 3 is aligned with the third groove 5 and jointly forms a first mounting groove 8, the second groove 4 is aligned with the fourth groove 6 and jointly forms a second mounting groove 9, a first connecting member 10 is provided in the first mounting groove 8, and a second connecting member 11 is provided in the second mounting groove 9, and the first connecting member 10 and the second connecting member 11 are fixedly connected from the inside-outside direction to lock the armrest member 2 and the backrest member 1.

[0037] The chair back assembly 100 including a backrest 1 and an armrest 2 is used in the simple chair to support the back of the human body and can also be used as an armrest to support the arms of the human body; the backrest 1 and the armrest 2 are detachably connected, which is convenient for packaging and transportation after disassembly, so as to reduce the cost of packaging and transportation; the grooves on the backrest 1 and the armrest 2, wherein two adjacent grooves have opposite openings, are connected as a whole after alignment, so as to form a mounting groove, in which the connecting member is just sunk for connection, and the connecting member is hidden in the mounting groove and will not protrude from the chair back assembly 100, so that the integrity of the chair back assembly 100 is better; there are mounting grooves on the inner and outer sides of the backrest 1 and the armrest 2, and the two connecting members are fixedly connected to each other at the connection between the backrest 1 and the armrest 2, so as to realize the connection and locking of the backrest 1 and the armrest 2, and the two connecting members provide better connection strength, so that the backrest 1 and the armrest 2 will not be broken or separated during use. In summary, the backrest 1 and the armrest 2 are both made of plastic, that is, plastic parts are used to replace traditional wooden parts, which overcomes technical difficulties and makes the simple chair structure simple, lightweight, low in production and transportation costs, and stable in connection.

[0038] like Fig. 9 As shown, a production method for producing the above-mentioned simple seat is provided, and the steps are as follows: S1 produces a chair back assembly 100: using plastic to form an independent backrest component 1 and an armrest component 2 by blow molding, and forming a first groove 3 and a second groove 4 on the backrest component 1, and forming a third groove 5 and a fourth groove 6 on the armrest component 2; S2 forms the installation groove: the armrest member 2 is placed beside the backrest member 1, and the first groove 3 is aligned with the opening of the third groove 5, and the second groove 4 is aligned with the opening of the fourth groove 6; the aligned first groove 3 and the third groove 5 form a first installation groove 8, and the aligned second groove 4 and the fourth groove 6 form a second installation groove 9; S3 installs the connecting parts: place the first connecting part 10 in the first installation groove 8, place the second connecting part 11 in the second installation groove 9, and then respectively fix the first connecting part 10 and the second connecting part 11 on the backrest part 1, and fix the first connecting part 10 and the second connecting part 11 on the armrest part 2.

[0039] The backrest member 1 and the armrest member 2 are blow-molded, with a thick appearance and better visual experience, and less material is used, which reduces costs. However, the strength is worse than that of a solid plastic plate molded by injection molding. Therefore, a more unique method is needed to connect the backrest member 1 and the armrest member 2. Since the blow-molded plastic member is thicker, in view of this feature, grooves are simultaneously molded on the backrest member 1 and the armrest member 2. The grooves have openings. After aligning the groove openings on the backrest member 1 and the armrest member 2, the two adjacent grooves are connected to form an installation groove, which cleverly allows the connecting member to be installed in the installation groove and hidden, achieving a better integrated visual effect. Moreover, after the connecting members in the two installation grooves are fixedly connected to each other, the connection between the armrest member 2 and the backrest member 1 is also more stable, reducing and lowering the possibility of shaking. In addition, the production steps are simple and the production efficiency is higher.

[0040] Specifically, the backrest member 1 and the armrest member 2 are both blow-molded by plastic, are hollow inside, and have low strength. The strength of the first connecting member 10 and the second connecting member 11 is greater than that of the backrest member 1 and the armrest member 2. Their materials are hard plastic or metal. In this embodiment, a stronger metal is used to ensure the high strength of the connecting members, and to ensure the connection strength and connection stability between the backrest member 1 and the armrest member 2; the connection strength mainly refers to the force bearing capacity, supporting capacity and the ability to prevent damage and disconnection; the connection stability mainly refers to the tightness of the connection and the fact that there will be no relative movement between the backrest member 1 and the armrest member 2.

[0041] like Figure 2-7As shown, the chair back assembly 100 is in a U-shaped semi-enclosed shape as a whole, and there are two armrest members 2, which are respectively located on the left and right sides of the backrest member 1. The armrest member 2 is roughly a trapezoidal plate-shaped body, and the backrest member 1 is roughly a rectangular plate-shaped body with an arc. The rear ends of the two armrest members 2 are connected to the backrest member 1 through the above-mentioned connection method; a total of four groups of first grooves 3 and second grooves 4 are opened on the backrest member 1, and there are two groups at the left and right ends of the backrest member 1, and the two groups of grooves at the same end are arranged at intervals up and down, which means that there are two groups of the above-mentioned connection structures between each armrest member 2 and the backrest member 1, so that the strength and stability after connection are relatively high; after the two armrest members 2 are connected to the backrest member 1, the outer contours of the three are continuous and smooth, so that the integrity and integration of the chair back assembly 100 are better, and in terms of visual perception, the simple chair is simple, beautiful and generous. Since the chair back assembly 100 is in a U-shape as a whole and has an arc at the connection between the armrest member 2 and the backrest member 1 , the first connecting member 10 and the second connecting member 11 are also bent accordingly.

[0042] like Figure 8 As shown, a positioning structure is provided between the armrest member 2 and the backrest member 1, and the positioning structure includes a positioning protrusion 12 and a positioning groove 13. The positioning protrusion 12 is provided on one of the armrest member 2 or the backrest member 1, and the positioning groove 13 is provided on the other of the armrest member 2 or the backrest member 1. The positioning protrusion 12 is located in the positioning groove 13 and is configured to align the first groove 3 with the third groove 5. In this embodiment, three truncated cone-shaped positioning protrusions 12 are provided on the end surface of the armrest member 2 facing the backrest member 1, and the three positioning protrusions 12 are arranged at intervals in the up-down direction, and three positioning grooves 13 are correspondingly provided on the end surface of the backrest member 1; the positioning structure facilitates the alignment and connection of the armrest member 2 and the backrest member 1, and can also enhance the connection strength of the armrest member 2 and the backrest member 1 after being connected.

[0043] More specifically, if Figure 2 , 3As shown in , 8, the first groove 3 and the second groove 4 are opened at the left and right ends of the backrest member 1, and the first groove 3 and the second groove 4 are both open to the outside of the backrest member 1 and open forward, and the two opening forward are the said opening. Similarly, the third groove 5 and the fourth groove 6 are opened at the rear end of the armrest member 2, and the two are both open to the outside of the armrest member 2 and open backward, and the two opening backward are the said opening, and the first groove 3 is specifically opened on the front surface of the backrest member 1, the second groove 4 is specifically opened on the rear surface of the backrest member 1, the third groove 5 is opened on the inner surface of the armrest member 2, and the fourth groove 6 is opened on the outer surface of the armrest member 2 surface; since the grooves have opposite openings, when the armrest member 2 is located beside the backrest member 1, the first groove 3 is located beside the third groove 5 and there is no obstruction between the two to achieve communication. The connected first groove 3 and the third groove 5 together form a first mounting groove 8. Similarly, the second groove 4 and the fourth groove 6 are connected to form a second mounting groove 9. The purpose of the grooves being open to their respective exteriors is to allow the first mounting groove 8 and the second mounting groove 9 to be open, and to allow the first connecting member 10 and the second connecting member 11 to be directly set in the grooves. The connecting members are sunk in the mounting grooves and will not protrude from the surface, so as to achieve the effect of enhancing integrity.

[0044] Furthermore, if Figure 3-8 As shown, on the backrest member 1, a first receiving groove 14 recessed toward the second groove 4 is formed on the groove wall of the first groove 3, and a second receiving groove 15 recessed toward the first groove 3 is formed on the groove wall of the second groove 4. The first connecting member 10 is provided with a first reinforcing convex portion 16 at the first receiving groove 14, and the second connecting member 11 is provided with a second reinforcing convex portion 17 at the second receiving groove 15. Similarly, on the armrest member 2, a first receiving groove 14 is also formed on the third groove 5, and a second receiving groove 15 is also formed on the fourth groove 6. Therefore, a first reinforcing convex portion 16 is provided on the left and right sides of the first connecting member 10, and a second reinforcing convex portion 17 is provided on the left and right sides of the second connecting member 11, respectively, which are used to further strengthen the connection with the backrest member 1 and the armrest member 2; when the connecting member is installed in the installation groove, the reinforcing convex portion enters the receiving groove and fits therewith, thereby increasing the contact area, making the force transmission area between the backrest member 1 and the connecting member, and between the armrest member 2 and the connecting member larger, and not prone to stress concentration, thereby strengthening the connection strength.

[0045] The groove wall of the first groove 3 and the groove wall of the third groove 5 are both provided with a positioning groove 18 recessed toward the outside, and a corresponding positioning ridge 19 is convexly provided on the first connecting member 10. The positioning ridge 19 and the positioning groove 18 both extend laterally. The positioning ridge 19 is arranged in the positioning groove 18, and the positioning ridge 19 is located between two reinforcing ridges. On the one hand, it is convenient for the first connecting member 10 to be positioned and installed with the first mounting groove 8, and on the other hand, the strength of the first connecting plate is further increased to increase the connection strength, and the relative movement between the armrest member 2 and the backrest member 1 in the up and down directions can be further limited to provide connection stability; the reinforcing ridge and the positioning ridge 19 are both formed by stamping of the connecting member.

[0046] Furthermore, the first reinforcing protrusion 16 and the second reinforcing protrusion 17 are both truncated cone-shaped, and their diameters gradually decrease from the bottom to the outside; the first accommodating groove 14 and the second accommodating groove 15 are of corresponding shapes; the truncated cone-shaped reinforcing protrusion and the accommodating groove have an inclination. Due to the existence of the inclination, the reinforcing protrusion can provide multi-directional limiting after entering the accommodating groove, thereby further increasing the connection strength and connection stability, and making the backrest member 1 and the connecting member connected more tightly, reducing the possibility of shaking after the two are connected.

[0047] like Figure 2 , 5 As shown in Figures 6 and 7, the first reinforcing protrusion 16 protrudes from the first connecting member 10 so that a first connecting groove 20 is naturally formed on the other side of the first connecting member 10. Similarly, a second connecting groove 21 is naturally formed on the second connecting member 11. The first connecting member 10 and the second connecting member 11 are both iron-containing alloys, such as steel. A magnet 22 is fixedly disposed in the first connecting groove 20. The magnet 22 is configured to allow the first connecting member 10 to adsorb the second connecting member 11 located outside the seat back assembly 100, which is convenient for assembly and connection without having to press the connecting member tightly in the mounting groove by hand. The first connecting member 10 and the second connecting member 11 are both iron-containing alloys, such as steel. A magnet 22 is fixedly disposed in the first connecting groove 20. The magnet 22 is configured to allow the first connecting member 10 to adsorb the second connecting member 11 located outside the seat back assembly 100, which is convenient for assembly and connection. The second connecting member 11 is fixedly connected by at least two fixing members (not shown) arranged along the inner and outer directions, wherein one fixing member passes through the first connecting member 10, the backrest member 1 and the second connecting member 11, and the other fixing member passes through the first connecting member 10, the armrest member 2 and the second connecting member 11. In this embodiment, the fixing members are bolts, which are the first bolt and the second bolt respectively; the magnet 22 is annular, and an internal thread is provided on the inner ring wall of the magnet 22. After the first connecting member 10 and the second connecting member 11 are connected by bolts, the head of the bolt is placed in the second connecting groove 21.

[0048] The backrest member 1 and the armrest member 2 are both made of plastic and have low strength. Moreover, after being directly connected with the bolts, the contact area between the bolts and the plastic member is very small. Therefore, there is a great possibility that they will be damaged due to excessive force. The force-bearing capacity of this connection method is too weak. In the present solution, the two bolts respectively pass through the backrest member 1 and the armrest member 2 while fixing the two connecting members together. The force is no longer transmitted directly from the plastic member to the bolts, but is transmitted to the bolts after passing through the connecting member with a larger contact area. That is, the bolts and the plastic member are separated by the connecting member. The bolts are relatively thin, and the contact area between the connecting member and the bolts is also small, but the strength of the connecting member is higher. At the same time, since the contact area between the connecting member and the plastic member is larger, it is not easy to produce stress concentration and other problems that may cause damage to the plastic member, thereby greatly improving the force strength.

[0049] Furthermore, if there are no installation grooves and accommodating grooves, even if the bolts are locked with the two connecting parts, the plastic part will still be at risk of damage; because there are no installation grooves, the two connecting parts will protrude outside the chair back assembly 100. Although the backrest part 1 and the armrest part 2 can be connected together, when the backrest part 1 is subjected to force, there is a tendency for the armrest part 2 to move away from each other. Because there is no reinforcing protrusion between the plastic part and the bolt on the connecting part, the armrest part 2 and the backrest part 1 will still be in direct contact with the bolt. With such a small contact area, the plastic part is prone to stress concentration and damage; moreover, the connection between the backrest part 1 and the armrest part 2 is not tight and is prone to shaking.

[0050] Due to the blow molding, the grooves and structures on the backrest member 1 and the armrest member 2 are integrally formed, and no subsequent processing is required, and they can be directly assembled and connected, and the production steps are simple and convenient.

[0051] Embodiment 2: The difference between this embodiment and embodiment 1 is that the connecting piece is made of different materials. Specifically: like Fig.10 , 11 As shown, in this embodiment, two pieces of hard plastic or metal and a piece of rubber are injection molded together, and the three are distributed left and right in sequence to form a first connecting member 10 and a second connecting member 11, wherein the hard material located at the two ends is a connecting portion 23, and the elastic material located between the two connecting portions 23 is an elastic portion 24, the connecting portion 23 is used to connect the backrest member 1 and the armrest member 2, and the elastic portion 24 is configured to give the backrest member 1 the ability to float backward relative to the armrest member 2; the elastic portion 24 is a material with elasticity such as rubber, and the connecting portion 23 is a rigid material such as hard plastic, metal, etc., on the one hand, the connecting portion 23 can ensure that the connection between the connecting member and the backrest member 1 and the armrest member 2 is sufficiently stable, and on the other hand, the elastic portion 24 enables the backrest member 1 to have a floating ability, and when the user lies on the backrest member 1, the backrest member 1 can float backward with a smaller buffer like an office chair, thereby increasing comfort.

Claims

1. A simple chair, characterized in that: The invention comprises a chair back assembly, which comprises a backrest member and an armrest member, both of which are made of plastic, and the backrest member and the armrest member are detachably connected; the backrest member is provided with at least one pair of first grooves and second grooves at the end close to the armrest member, and the first groove is located on the inner side of the second groove; the armrest member is provided with at least one pair of third grooves and fourth grooves at the end close to the backrest member, and the third groove is located on the inner side of the fourth groove, the first, second, third and fourth grooves are all at the same height, and the four are all provided with openings facing each other; the first groove is aligned with the third groove and jointly forms a first mounting groove, the second groove is aligned with the fourth groove and jointly forms a second mounting groove, a first connecting member is provided in the first mounting groove, and a second connecting member is provided in the second mounting groove, and the first connecting member and the second connecting member are fixedly connected from the inside-outside direction to lock the armrest member and the backrest member.

2. The simple chair according to claim 1, characterized in that: A first receiving groove recessed toward the second groove is formed on the groove wall of the first groove, a second receiving groove recessed toward the first groove is formed on the groove wall of the second groove, the first connecting member is provided with a first reinforcing protrusion at the first receiving groove, and the second connecting member is provided with a second reinforcing protrusion at the second receiving groove.

3. The simple chair according to claim 2, characterized in that: The first reinforcement protrusion and the second reinforcement protrusion are both truncated cone-shaped, and the diameters of the two are gradually reduced from the bottom to the outside; the first accommodation groove and the second accommodation groove are corresponding shapes.

4. The simple chair according to claim 2, characterized in that: The first reinforcing protrusion protrudes from the first connecting member to form a first connecting groove on the other side of the first connecting member. Similarly, a second connecting groove is formed on the second connecting member. Both the first connecting member and the second connecting member are iron-containing alloys. A magnet is fixed in the first connecting groove. The magnet is configured to enable the first connecting member to adsorb the second connecting member located on the outside of the seat back assembly.

5. The simple chair according to claim 4, characterized in that: The magnet is annular, and an internal thread is arranged on the inner ring wall of the magnet. The first connecting member is connected with the second connecting member through bolts, and the head of the bolt is placed in the second connecting groove.

6. The simple chair according to claim 1, characterized in that: The groove wall of the first groove and the groove wall of the third groove are both provided with positioning grooves recessed toward the outside, and the first connecting member is correspondingly provided with positioning convex strips, and the positioning convex strips are arranged in the positioning grooves.

7. The simple chair according to claim 1, characterized in that: The strength of the first connecting member and the second connecting member is greater than that of the backrest member and the armrest member; the first connecting member and the second connecting member are fixedly connected by at least two fixing members arranged along the inner and outer directions, one of which passes through the first connecting member, the backrest member and the second connecting member, and the other fixing member passes through the first connecting member, the armrest member and the second connecting member.

8. The simple chair according to claim 7, characterized in that: The first connecting member and the second connecting member are both made of metal.

9. The simple chair according to claim 1, characterized in that: The backrest plate is provided with two pairs of first grooves and second grooves, and the two pairs of first grooves and second grooves are arranged vertically and spaced apart.

10. The simple chair according to claim 1, characterized in that: A positioning structure is provided between the armrest and the backrest, and the positioning structure includes a positioning protrusion and a positioning groove. The positioning protrusion is arranged on one of the armrest or the backrest, and the positioning groove is arranged on the other of the armrest or the backrest. The positioning protrusion is located in the positioning groove and is configured to align the first groove with the third groove.

11. The simple chair according to claim 1, characterized in that: The first connecting member and the second connecting member each include two connecting parts at both ends and an elastic part between the two connecting parts, the connecting parts are used to connect the backrest member and the armrest member, and the elastic part is configured to give the backrest member the ability to float backward relative to the armrest member.

12. A method for producing a simple chair according to any one of claims 1 to 11, characterized in that: The steps are: S1 produces chair back components: using plastic to form independent backrest parts and armrest parts through blow molding, and forming a first groove and a second groove on the backrest part, and forming a third groove and a fourth groove on the armrest part; S2 forms the installation groove: the armrest is placed beside the backrest, and the first groove is aligned with the opening of the third groove, and the second groove is aligned with the opening of the fourth groove; the aligned first groove and the third groove form a first installation groove, and the aligned second groove and the fourth groove form a second installation groove; S3 installs the connecting member: places the first connecting member in the first installation groove, places the second connecting member in the second installation groove, and then respectively fixes the first connecting member on the backrest member and the part of the second connecting member, and fixes the first connecting member on the armrest member and the part of the second connecting member.

13. The method for producing a simple chair according to claim 12, characterized in that: In step S1 , a first accommodating groove is formed on the groove wall of the first groove, and a second accommodating groove is formed on the groove wall of the second groove.

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