Backrest framework and seat backrest with same

Abstract

The backrest framework comprises a lower supporting component, the lower supporting component is used for supporting the middle lower section of the back of a user, the middle position of the top of the lower supporting component is fixedly connected with an upper supporting component extending upwards, and the upper supporting component is used for supporting the middle upper section of the back of the user; assembling seats are mounted on the lower sides of the two ends of the lower supporting component and are rotationally mounted at the rear end of a seat frame. The backrest has the beneficial effects that the structural strength of the backrest framework can be improved, and after the backrest foam is mounted on the backrest framework, the overall stress balance of the backrest can be ensured, and the overall stability of the seat is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to a backrest frame and a seat back with the backrest frame. Background Art

[0002] Car seats are one of the most important parts of a car. They can provide a comfortable and safe riding position for drivers and passengers. As people's requirements for seat comfort and functionality continue to increase, the design limitations of traditional seat backs have become increasingly prominent.

[0003] The existing seat back is composed of a support frame, foam and a mask. The support frame of the backrest is usually a rectangular metal frame. Such a structural design will result in the occupants being unable to form strong support in the middle spine direction when sitting. When subjected to large external forces, local deformation is prone to occur, affecting the overall stability of the seat. Summary of the invention

[0004] In view of this, one of the objectives of the present invention is to provide a backrest frame to overcome the above-mentioned defects in the prior art.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A backrest frame, the key of which is that it comprises: a lower support member, the lower support member is used to support the middle and lower part of the user's back, an upper support member extending upward is fixedly connected to the middle position of the top of the lower support member, the upper support member is used to support the middle and upper part of the user's back;

[0007] The lower sides of both ends of the lower support member are both equipped with assembly seats, and the assembly seats are used for rotationally mounting to the rear end of the seat frame.

[0008] With the above structure, by designing the backrest frame into an upper support member and a lower support member connected up and down, the lower support member can provide strong support to the middle and lower part of the user's back and waist, and the upper support member can provide strong support to the middle and upper part of the user's back.

[0009] Preferably, the lower supporting member is configured as an arc-shaped arch structure.

[0010] Preferably, the lower supporting member is made of a bent pipe, and the lower end of the upper supporting member is fixedly welded to the middle position of the top of the lower supporting member.

[0011] Preferably, the upper supporting member is a long strip member, the cross section of which has an N-shaped structure and supporting flanges extending outward from the lower ends of both sides of the N-shaped structure.

[0012] Preferably, a support back plate is fixedly mounted on the front sides of the lower support member and the upper support member, and the lower middle portion of the support back plate is hollowed out.

[0013] Preferably: the circumferential edge of the hollow area in the lower part of the support backplate is fixedly connected to the lower support member, and a positioning groove adapted to the N-shaped structure is formed on the rear side of the support backplate, and the areas on both sides of the support backplate corresponding to the positioning groove are locked to the support flange by fasteners.

[0014] Preferably, a connecting lug is provided at the upper edge of the hollow area in the lower middle part of the support back plate, the connecting lug is fixedly connected to the rear side of the lower support member, and the areas on both sides of the support back plate corresponding to the positioning groove are fixedly connected to the front side of the support flange.

[0015] Preferably, the circumferential edge of the supporting back plate is provided with a forward-protruding flange side wing, and the forward protruding height of the flange side wing gradually increases from top to bottom.

[0016] The second purpose of the present invention is to provide a seat back, the key of which is: it includes the above-mentioned back frame, and also includes a back foam made by 3D printing technology, and the back foam is provided with a first wrapping structure surrounding it in the circumferential direction on the rear side, and the first wrapping structure is ring-mounted on the circumferential edge of the support back plate.

[0017] As a preference: the backrest foam is made of thermoplastic polyurethane rubber;

[0018] and / or the backrest foam surface is covered with a face cover, and the back side of the backrest frame is covered with a cover plate;

[0019] And / or the middle part and / or the two side areas of the backrest foam are integrally printed with a soft supporting area.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The backrest frame provided by the present invention is designed to be an upper supporting member and a lower supporting member connected up and down, so that the lower supporting member can provide strong support to the middle and lower part of the user's back and waist, and the upper supporting member can provide strong support to the middle and upper part of the user's back. Such a structural design can improve the structural strength of the backrest frame, and when the backrest foam is installed on the backrest frame, it can ensure that the overall force of the backrest is balanced, thereby improving the overall stability of the seat.

[0022] 2. The backrest frame provided by the present invention and the lower supporting member of the arc-shaped arch structure can save materials and costs while ensuring the overall structural strength of the backrest, and has the technical advantages of simple structure and easy design and installation.

[0023] 3. The lower support member is made of bent pipe, which not only has good strength and toughness, but also has a light weight, which is conducive to the lightweight design of the seat. Another convenience is that the lower support member made of bent pipe can make more effective use of space to facilitate the installation of other functional components, such as pipes for seat heating and ventilation devices, lines for adjustment structures, etc., which can integrate more functional components without increasing the thickness of the seat back, thereby improving the comfort and convenience of the seat.

[0024] 4. The seat back provided by the present invention can improve the convenience and stability of the back foam assembly, ensuring the high consistency of the seat quality. Secondly, the back foam is made by 3D printing technology, which can directly, quickly and accurately manufacture the foam body, ensure the consistency of the foam body structure, speed up the product development cycle and the speed to market, and is conducive to mass production. At the same time, it can also easily realize personalized customized production according to the specific needs and requirements of users. On the other hand, 3D printing can accurately control the structure and material distribution of the foam body, design a lattice structure or porous structure with lightweight characteristics, and effectively reduce the weight of the car seat while ensuring the strength and comfort of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram showing the structure of the connection between the backrest frame and the seat frame B;

[0026] Figure 2 It is an exploded schematic diagram of the backrest frame, the supporting back plate 3 and the cover plate 6;

[0027] Figure 3 It is the right side view of the backrest frame;

[0028] Figure 4 A schematic diagram showing the rear structure of the upper support member 2;

[0029] Figure 5 It is a schematic diagram of the structure of the seat back (the back foam 5 only shows half of the structure);

[0030] Figure 6 is a sectional view of a seat back;

[0031] Figure 7 A schematic diagram of the structure of the backrest frame with the support back plate 3 installed;

[0032] Figure 8 is a schematic diagram of the structure of the backrest foam 5 (only half of the structure is shown);

[0033] Fig. 9 Another structural schematic diagram of a seat back (the back foam 5 only shows half of the structure, and the cover plate 6 is hidden);

[0034] Fig.10A schematic diagram showing the structure of the seat back from a dorsal perspective;

[0035] Fig.11 A schematic diagram showing the back structure of the supporting back plate 3. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with embodiments and drawings.

[0037] like Figure 1 and Figure 5 As shown, a seat back includes a backrest frame, a backrest foam 5 and a face cover (not shown in the figure), wherein the backrest foam 5 is arranged on the front side of the backrest frame, and the surface of the backrest foam 5 is covered with the face cover. The backrest frame includes a lower support member 1, and the lower support member 1 is used to support the middle and lower part of the user's back. An upper support member 2 extending upward is fixedly connected to the middle position of the top of the lower support member 1, and the upper support member 2 is used to support the middle and upper part of the user's back. In this embodiment, the midpoint of the top of the lower support member 1 and the two end points on the lower side of the lower support member 1 form a triangular frame, which can ensure the structural strength of the lower support member 1. Figure 1 It can be seen that assembly seats 3 are installed on the lower sides of both ends of the lower support member 1, and the assembly seats 3 are used for rotationally mounting to the rear end of the seat frame B.

[0038] Based on the above structural design, by designing the backrest frame into an upper support component 2 and a lower support component 1 connected up and down, the lower support component 1 can provide strong support to the middle and lower part of the user's back and waist, and the upper support component 2 can provide strong support to the middle and upper part of the user's back. Such a structural design can improve the structural strength of the backrest frame, and when the backrest foam 5 is installed on the backrest frame, it can ensure that the overall force of the backrest is balanced, thereby improving the overall stability of the seat.

[0039] Furthermore, Figure 1 As shown, the lower support member 1 is constructed as an arc-shaped arch structure. Such a structural design can improve the structural strength, so that the lower support member 1 can better disperse the pressure on the seat and prevent the frame from deforming. On the other hand, it can also save materials and costs, and has the technical advantages of simple structure, easy design and installation.

[0040] Furthermore, the lower support member 1 is made of a bent pipe. Considering this, the lower support member 1 not only has good strength and toughness, but also has a light weight, which is conducive to the lightweight design of the seat. Another convenience is that the lower support member 1 made of a bent pipe can more effectively utilize space to facilitate the installation of other functional components, such as pipes for seat heating and ventilation devices, circuits for adjustment structures, etc., with the advantages of high integration and compact structure. The lower end of the upper support member 2 is fixedly welded to the middle position of the top of the lower support member 1.

[0041] Combination Figure 1and 4 As shown, the upper support member 2 is a long strip member, and its cross section has an N-shaped structure and support flanges 21 extending outward from the lower ends of both sides of the N-shaped structure. The N-shaped cross section of the long strip member can enhance the compression resistance of the frame and maintain the stability of the structure. The support flanges 21 can be easily connected with adjacent components during seat assembly, thereby enhancing the stability of the connection.

[0042] Then by Figure 1 and Figure 4 As shown, the lower end surface of the upper support member 2 is provided with an irregular arc structure 22, and the arc structure 22 matches the top profile of the arc-shaped arch-shaped lower support member 1. Such a structural design can increase the contact area between the upper support member 2 and the lower support member 1, enhance the firmness of welding, and improve the welding quality.

[0043] refer to Figure 3 In this embodiment, the upper support member 2 is a sheet metal part, which has the technical advantages of excellent strength and good stability. In addition, the upper support member 2 is constructed into a slightly backward-distorted structure, which can better fit the physiological curve of the human spine, making the backrest more ergonomically designed.

[0044] Please refer to Figure 7 A support back plate 3 is fixedly installed on the front side of the lower support member 1 and the upper support member 2. The support back plate 3 can increase the support area of ​​the backrest frame and further improve the support strength of the backrest. In this embodiment, the lower part of the support back plate 3 is a hollow design, which reserves installation space inside the seat backrest, and more functional components can be integrated without increasing the thickness of the backrest.

[0045] The support back plate 3 is made of thermoplastic polyurethane rubber. Considering this, the support back plate 3 has the advantages of light weight, high strength and good toughness. It is not easy to deform when subjected to external force, and can provide reliable support for the seat to ensure riding safety.

[0046] Further, refer to Figure 2 and 7 The peripheral edge of the hollow area in the lower part of the support back plate 3 is fixedly connected to the lower support member 1, and then combined with Fig.11 As shown, a positioning groove 32 adapted to the N-shaped structure is formed on the rear side of the support back plate 3, and the support back plate 3 is locked on the support flange 21 by fasteners 7 at the two side areas corresponding to the positioning groove 32. In this embodiment, the fasteners 7 are bolts. Such a structural design can ensure the stability of the installation of the support back plate 3, and it will not shake left and right, and has high reliability.

[0047] Combination Fig. 9 and Fig.11As shown, the upper edge of the hollow area in the middle and lower part of the support back plate 3 is provided with a connecting lug 3a, which is fixed to the rear side of the lower support member 1 by bolts, and the number of connecting lugs 3a is provided with two. The areas on both sides of the support back plate 3 corresponding to the positioning groove 32 are fixed to the front side of the support flange 21. Such a design has the advantages of high connection strength and good stability.

[0048] Please refer to Fig. 9 Pads 8 are provided between the two surfaces where the support back plate 3 contacts the two support flanges 21. The pads 8 can elastically tighten the support back plate 3 and provide better support and stability, prevent the fasteners 7 from loosening, and reduce the wear between the support back plate 3 and the upper support member 2.

[0049] Then by Figure 2 and Figure 7 As shown, the peripheral edge of the support back plate 3 is provided with a forward-protruding flange 31, and the forward protruding height of the flange 31 gradually increases from top to bottom. Such a design can effectively support the side wing areas on both sides of the backrest.

[0050] like Figure 5 and Fig. 9 As shown, the back side of the backrest foam 5 is provided with a first wrapping structure 51 surrounding the circumference. Figure 6 It can be seen that the first wrapping structure 51 is looped on the circumferential edge of the support back plate 3. Such a mounting structure can improve the convenience and stability of assembly and ensure the consistency of seat quality. At the same time, the backrest foam 5 is made by 3D printing technology, which can directly, quickly and accurately manufacture the foam body to ensure the consistency of the foam body structure. At the same time, it can also easily realize personalized customized production according to the specific needs and requirements of the user. On the other hand, 3D printing can accurately control the structure and material distribution of the foam body, and design a lattice structure or porous structure with lightweight characteristics, which effectively reduces the weight of the car seat while ensuring the strength and comfort of the seat.

[0051] Please refer to Figure 1 and Figure 2 A retainer 4 is connected between the assembly seats 3 at both ends of the lower support member 1. Figure 8 and Fig. 9 It can be seen that in this embodiment, the first wrapping structure 51 is a structure folded backward and downward, and is distributed at the upper end and the circumferential edges of the left and right sides of the backrest foam 5. Figure 6 and 8A first connection groove 511 is formed inside the first wrapping structure 51, and the first connection groove 511 is adapted to the flanged side wing 31 of the support back plate 3. A second wrapping structure 52 is bent backward at the lower rear end of the backrest foam 5, and the second wrapping structure 52 is used to be sleeved on the retaining frame 4. A second connection groove 522 is formed inside the second wrapping structure 52, and the second connection groove 522 is adapted to the outer contour of the retaining frame 4.

[0052] In this embodiment, the backrest foam 5 is made of thermoplastic polyurethane rubber. The foam of thermoplastic polyurethane rubber is 3D printed, which has excellent comfort, wear resistance and compressive strength, and is lighter than traditional seats, so that the lightweight design of the car seat can be achieved.

[0053] Please refer to Figure 8 , the middle and / or both side areas of the front surface of the back foam 5 are provided with a soft support area a, and the hardness of the soft support area a is less than the hardness of the back foam 5 body. In this embodiment, the soft support area a is distributed in the middle and both side wing areas of the back foam 5. The soft support area a in the middle of the back foam 5 corresponds to the area where the user's back rests, and the side wings of the back foam 5 are distributed with an upper soft support area a and a lower soft support area a, the upper soft support area a is the area where the user's shoulder rests, and the lower soft support area a is the area where the user's arm rests.

[0054] Based on this, the backrest adopts a soft and hard partition design, which can enhance the support of the backrest while improving the comfort of riding, ensuring that all parts of the body can get comfortable support and avoiding fatigue and discomfort caused by excessive local pressure. In addition, the backrest foam 5 body and the soft support area a can be directly printed through 3D printing technology, which improves production efficiency and reduces production costs. In actual application, the soft support area a is not limited to the above distribution method. Manufacturers can customize the design according to the needs of different customer groups, thereby producing different soft and hard partitions.

[0055] Since the backrest foam 5 is fixed to the support back plate 3 in a ring-shaped manner and does not fully cover the rear side of the backrest frame, for the sake of the overall structural beauty, such as Fig.10 As shown, a cover plate 6 is fixedly mounted on the rear side of the backrest frame. Fig. 9 As shown, in this embodiment, the circumferential edge of the first wrapping structure 51 is provided with a second connection structure 53 recessed toward the inside of the backrest, the recessed depth of the second connection structure 53 is adapted to the thickness of the cover plate 6, and the second connection structure 53 is adapted to the circumferential contour of the upper part of the cover plate 6. During installation, the backrest foam 5 is assembled first, and then the cover plate 6 is installed. The cover plate 6 can be connected to the back side of the backrest foam 5 as a whole, thereby ensuring the overall aesthetics of the seat back.

[0056] Reference Fig. 9, a plurality of protrusions 54 are distributed on the back side of the backrest foam 5, and the protrusions 54 are provided with a snap-in groove b for installing the backrest functional parts, and the functional parts may be ventilation devices and massage devices that need to be arranged in the backrest. Combined with the structural design of the lower support member 1 and the support back plate 3, the lower support member 1 and the support back plate 3 do not interfere with the installation of the functional parts, and the protrusions 54 can be exposed in the space surrounded by the arc-shaped arch structure, so that the functional parts can be better embedded in the backrest and will not occupy the external space of the seat. It has the advantages of high integration, compact structure, neat and beautiful appearance, and convenient installation, and it can choose whether to install such functional parts according to the needs of users.

[0057] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A backrest frame, characterized in that: include: A lower support member (1), the lower support member (1) being used to support the middle and lower part of the back of a user, an upper support member (2) extending upwards being fixedly connected to the middle position of the top of the lower support member (1), the upper support member (2) being used to support the middle and upper part of the back of the user; The lower sides of both ends of the lower support member (1) are both provided with assembly seats (3), and the assembly seats (3) are used for being rotatably mounted to the rear end of the seat frame.

2. The backrest frame according to claim 1, characterized in that: The lower supporting member (1) is configured as an arc-shaped arch structure.

3. The backrest frame according to claim 2, characterized in that: The lower support member (1) is made of a bent pipe, and the lower end of the upper support member (2) is fixedly welded to the middle position of the top of the lower support member (1).

4. The backrest frame according to claim 1, characterized in that: The upper support member (2) is a long strip member, and its cross section has an N-shaped structure and support flanges (21) extending outwards from the lower ends of both sides of the N-shaped structure.

5. The backrest frame according to claim 4, characterized in that: A support back plate (3) is fixedly mounted on the front sides of the lower support member (1) and the upper support member (2), and the lower middle portion of the support back plate (3) is of hollow design.

6. The backrest frame according to claim 5, characterized in that: The peripheral edge of the hollow area in the lower middle part of the support back plate (3) is fixedly connected to the lower support member (1); a positioning groove (32) adapted to the N-shaped structure is formed on the rear side of the support back plate (3); and the areas on both sides of the support back plate (3) corresponding to the positioning groove (32) are locked to the support flange (21) by fasteners (7).

7. The backrest frame according to claim 6, characterized in that: A connecting lug (3a) is provided at the upper edge of the hollow area in the lower middle portion of the support back plate (3), and the connecting lug (3a) is fixedly connected to the rear side of the lower support member (1), and the areas on both sides of the support back plate (3) corresponding to the positioning groove (32) are fixedly connected to the front side of the support flange (21).

8. The backrest frame according to claim 5, characterized in that: The peripheral edge of the supporting back plate (3) is provided with a flanged side wing (31) protruding forward, and the forward protruding height of the flanged side wing (31) gradually increases from top to bottom.

9. A seat back, characterized in that: It comprises the backrest frame as claimed in claim 5, and also comprises a backrest foam (5) made by a 3D printing process, wherein the back side of the backrest foam (5) is provided with a first wrapping structure (51) surrounding in the circumferential direction, and the first wrapping structure (51) is looped on the circumferential edge of the support back plate (3).

10. The seat back according to claim 9, characterized in that: The backrest foam (5) is made of thermoplastic polyurethane rubber; and / or the surface of the backrest foam (5) is covered with a cover, and the rear side of the backrest frame is covered with a cover plate (6); And / or the middle and / or both side regions of the backrest foam (5) are integrally printed with a soft supporting region (a).

Images