A backrest framework and a seat back with the backrest framework

Abstract

The application discloses a backrest framework and a seat backrest with the same, which comprises a lower supporting component used for supporting the middle lower part of the back of a user, an upwardly extending upper supporting component fixedly connected to the middle position of the top of the lower supporting component and used for supporting the middle upper part of the back of the user, and an assembling seat installed at the lower side of both ends of the lower supporting component and used for being rotatably installed to the rear end of a seat frame. The backrest framework has the advantages that the structural strength of the backrest framework can be improved, and when backrest foams are installed on the backrest framework, the overall stress balance of the backrest can be ensured, and the stability of the seat as a whole is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile seats, in particular to a backrest framework and a seat backrest with the same. BACKGROUND

[0002] Automobile seats are important components of automobiles, which can provide comfortable and safe seating positions for drivers and passengers. With the increasing demand for comfort and functionality of seats, the design limitations of traditional seat backrests have become increasingly prominent.

[0003] The existing seat backrest is composed of a support framework, foam and a face shield. The support framework of the backrest is usually a rectangular metal framework. Such a structure design cannot provide strong support for the middle spine direction when the occupant is sitting, and local deformation may occur when a large external force is applied, affecting the overall stability of the seat. SUMMARY

[0004] Therefore, one of the purposes of the present application is to provide a backrest framework to overcome the above-mentioned defects in the prior art.

[0005] To achieve the above-mentioned purposes, the technical solutions of the present application are as follows:

[0006] A backrest framework, the key of which is that it comprises a lower support member for supporting the middle lower segment of the user's back, and an upwardly extending upper support member fixedly connected to the middle of the top of the lower support member for supporting the middle upper segment of the user's back.

[0007] The lower support member is provided with an assembly seat on the lower side of each end, which is used for rotating installation to the rear end of the seat frame.

[0008] With the above structure, the backrest framework is designed as an upper support member and a lower support member connected in series. The lower support member can provide strong support for the middle lower segment of the user's back and the waist, and the upper support member can provide strong support for the middle upper segment of the user's back.

[0009] As a preferred embodiment, the lower support member is configured in an arc-shaped arch structure.

[0010] As a preferred embodiment, the lower support member is made of a bent pipe, and the lower end of the upper support member is fixedly welded to the middle of the top of the lower support member.

[0011] As a preferred embodiment, the upper support member is a long strip-shaped member, and its cross section has an n-shaped structure and support flanges extending outward from the lower ends of both sides of the n-shaped structure.

[0012] Preferably, the lower support member and the upper support member are fixedly installed with a support back plate in front, and the lower part of the support back plate is designed as a hollow part.

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

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

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

[0016] The second object of the present application is to provide a seat backrest, which is characterized by comprising the backrest framework as described above, and further comprising a backrest foam made of a 3D printing process, and the rear side of the backrest foam is provided with a first wrapping structure surrounding in the circumferential direction, and the first wrapping structure is sleeved on the circumferential edge of the support back plate.

[0017] Preferably, the backrest foam is made of thermoplastic polyurethane rubber.

[0018] And / or the surface of the backrest foam is covered with a face cover, and the rear side of the backrest framework is covered with a cover plate.

[0019] And / or the middle and / or both side areas of the backrest foam are integrally printed and formed with soft support areas.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] 1. The backrest framework provided by the present application is designed as an upper support member and a lower support member connected in series, the lower support member can provide strong support to the middle and lower parts of the user's back and the waist, and the upper support member can provide strong support to the upper part of the user's back, which can improve the structural strength of the backrest framework, and when the backrest foam is installed on the backrest framework, it can ensure that the whole backrest is balanced and improve the stability of the whole seat.

[0022] 2. The lower support member with an arc-shaped arch structure can save materials and costs while ensuring the structural strength of the whole backrest, and has the technical advantages of simple structure, easy design and installation.

[0023] 3. The lower support component is made of bent tubing, which not only possesses good strength and toughness but is also lightweight, facilitating lightweight seat design. Another advantage is that the bent tubing lower support component allows for more efficient use of space, facilitating the installation of other functional components, such as ductwork for seat heating and ventilation devices, and wiring for adjustment mechanisms. This allows the seat back to integrate more functional components without increasing its thickness, enhancing both comfort and convenience.

[0024] 4. The seat back provided by this invention improves the convenience and stability of foam assembly, ensuring high consistency in seat quality. Secondly, the backrest foam is manufactured using 3D printing technology, enabling direct, rapid, and precise production of the foam body. This ensures structural consistency, accelerates product development cycles and time-to-market, and facilitates mass production. Furthermore, it allows for easy customization based on specific user needs and requirements. On the other hand, 3D printing allows for precise control of the foam's structure and material distribution, enabling the design of lightweight lattice or porous structures. This effectively reduces the weight of the car seat while maintaining its strength and comfort. Attached Figure Description

[0025] Figure 1 This is a structural diagram illustrating the connection between the backrest frame and the seat frame B;

[0026] Figure 2 An exploded view of the backrest frame, supporting back panel 3, and cover plate 6.

[0027] Figure 3 Right view of the backrest frame;

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

[0029] Figure 5 This is a structural diagram of the seat back (only half of the structure is shown in foam 5 of the backrest).

[0030] Figure 6 This is a sectional view of the seat back.

[0031] Figure 7 A schematic diagram of the structure for installing the support back panel 3 onto the backrest frame;

[0032] Figure 8 This is a structural diagram of the backrest foam 5 (only half of the structure is shown).

[0033] Figure 9 This is another structural diagram of the seat back (only half of the backrest foam 5 is shown, the cover plate 6 is hidden).

[0034] Figure 10Structure diagram showing the back side view of the seat backrest;

[0035] Figure 11 Structure diagram showing the back side view of the support back plate 3. DETAILED DESCRIPTION

[0036] The present application is further described in conjunction with the embodiments and the accompanying drawings.

[0037] As shown in Figure 1 and Figure 5 , a seat backrest comprises a backrest framework, a backrest foam 5 and a face cover (not shown in the figure), the backrest foam 5 is arranged on the front side of the backrest framework, and the surface of the backrest foam 5 is covered with the face cover. The backrest framework comprises a lower support member 1 for supporting the middle and lower part of the user's back, and an upper support member 2 extending upwardly fixedly connected to the middle position of the top of the lower support member 1, which is used to support the middle and upper part of the user's back. In this embodiment, the middle point 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. By Figure 1 It can be seen that the lower side of the two ends of the lower support member 1 is provided with an assembly seat 9, which is used to rotate and install to the rear end of the seat frame B.

[0038] Based on the above structural design, by designing the backrest framework as an upper support member 2 and a lower support member 1 connected in series, the lower support member 1 can provide strong support to the middle and lower part of the user's back, and the upper support member 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 framework, and when the backrest foam 5 is installed on the backrest framework, it can ensure that the overall backrest is balanced in force, thereby improving the overall stability of the seat.

[0039] Further, as shown in Figure 1 , the lower support member 1 is configured in 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 borne by the seat and prevent the framework 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] Further, the lower support member 1 is made of a bent pipe. In this way, the lower support member 1 not only has good strength and toughness, but also has a relatively light weight, which is beneficial to the lightweight design of the seat. On the other hand, the lower support member 1 made of a bent pipe can make more effective use of space to facilitate the installation of other functional components, such as the pipelines of the seat heating and ventilation devices, the lines of the adjustment structure, etc., and has 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] In combination with Figure 1and 4 As shown, the upper support member 2 is a long strip member with an n-shaped cross-section 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 compressive strength of the frame and maintain the stability of the structure. The support flanges 21 can be easily connected to adjacent components during seat assembly, thereby strengthening the stability of the connection.

[0042] Then by Figure 1 and Figure 4 As shown, the lower surface of the upper support member 2 has an irregular arc-shaped structure 22, which matches the top contour of the lower support member 1 with its arc-shaped arch structure. This structural design increases the contact area between the upper support member 2 and the lower support member 1, enhances the strength of the weld, and improves the weld 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 with a slightly backward-curved structure, which can better conform to the physiological curve of the human spine, making the backrest more ergonomically designed.

[0044] Please refer to Figure 7 A support backplate 3 is fixedly installed on the front side of the lower support member 1 and the upper support member 2. The support backplate 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 backplate 3 has a hollow design, which reserves installation space inside the seat back, allowing more functional components to be integrated without increasing the thickness of the backrest.

[0045] The support back panel 3 is made of thermoplastic polyurethane rubber. With this in mind, the support back panel 3 has the advantages of being lightweight, high-strength and tough. It is not easily deformed when subjected to external forces, and can provide reliable support for the seat to ensure the safety of the ride.

[0046] Further, refer to Figure 2 and 7 The circumferential edge of the hollowed-out area in the lower part of the support back plate 3 is fixedly connected to the lower support component 1, and then combined with... Figure 11 As shown, the rear side of the support back plate 3 has a positioning groove 32 adapted to the n-shaped structure. The areas on both sides of the support back plate 3 corresponding to the positioning groove 32 are fastened to the support flange 21 by fasteners 7. In this embodiment, the fasteners 7 are bolts. This structural design ensures the stability of the support back plate 3 during installation, preventing lateral swaying and ensuring high reliability.

[0047] Combination Figure 9 and Figure 11As shown, the upper end edge of the hollowed-out area in the 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 two. The support back plate 3 is fixed to the front side of the support flange 21 corresponding to the two sides of the positioning groove 32. In this way, the design has the advantages of high connection strength and good stability.

[0048] Please refer to Figure 9 , the two surfaces between the support back plate 3 and the two support flanges 21 are provided with pads 8, which can make the support back plate 3 elastic and tight, and can provide better support and stability, prevent the fastener 7 from loosening, and reduce the wear between the support back plate 3 and the upper support member 2.

[0049] Again from Figure 2 and Figure 7 , the circumferential edge of the support back plate 3 is provided with a flange side wing 31 protruding forward, and the height of the flange side wing 31 gradually increases from top to bottom. In this way, the two side wing areas of the backrest can be effectively supported.

[0050] As shown in Figure 5 and Figure 9 , the rear side of the backrest foam 5 is provided with a circumferentially surrounding first wrapping structure 51, which can be seen from Figure 6 , the first wrapping structure 51 is sleeved on the circumferential edge of the support back plate 3. Such 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 of 3d printing process, which can directly, quickly and accurately manufacture the foam body, ensure the consistency of foam body structure, and also can easily realize individualized customization 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, and design a lattice structure or a porous structure with lightweight characteristics, which effectively reduces the weight of the automobile seat under the premise of ensuring the strength and comfort of the seat.

[0051] Please refer to Figure 1 and Figure 2 , the retaining ring 4 is connected between the assembly seats 9 at both ends of the lower support member 1. As can be seen from Figure 8 and Figure 9 , in this embodiment, the first wrapping structure 51 is a structure folded backward and downward, which is distributed on the circumferential edge of the upper end and both sides of the backrest foam 5. Please refer to Figure 6 and 8The first wrapping structure 51 is formed with a first connecting groove 511 on the inner side of the first wrapping structure 51, which is adapted to the flange side wing 31 of the support back plate 3. The backrest foam 5 is provided with a second wrapping structure 52 at the lower end of the rear side of the backrest foam 5, which is used to be sleeved on the holder 4. The second wrapping structure 52 is formed with a second connecting groove 522 on the inner side of the second wrapping structure 52, which is adapted to the outer side contour of the holder 4.

[0052] In the embodiment, the backrest foam 5 is made of thermoplastic polyurethane rubber. The 3D printing of the thermoplastic polyurethane rubber foam body has excellent comfort, wear resistance and compression strength, and has a lighter weight than traditional seats, which can realize the lightweight design of the automobile seat.

[0053] Please refer to Figure 8 The middle and / or both side regions of the front side surface of the backrest foam 5 are provided with soft support regions a, and the hardness of the soft support regions a is less than the hardness of the body of the backrest foam 5. In the embodiment, the soft support regions a are distributed in the middle and both side wing regions of the backrest foam 5. The soft support region a in the middle of the backrest foam 5 corresponds to the region where the user's back leans against, and the upper soft support region a and the lower soft support region a are distributed in the side wings of the backrest foam 5. The upper soft support region a is the region where the user's shoulders lean against, and the lower soft support region a is the region where the user's arms lean against.

[0054] Based on this, the backrest adopts a soft and hard partition design, which can enhance the support of the backrest and improve the comfort of the seat, ensure that each part of the body can be comfortably supported, and avoid fatigue and discomfort caused by excessive local pressure. Moreover, the 3D printing technology can directly print the body of the backrest foam 5 and the soft support region a, which improves the production efficiency and reduces the manufacturing cost. In actual application, the soft support region a is not limited to the above distribution manner, and the manufacturer can customize the design according to the needs of different customer groups to produce different soft and hard partitions.

[0055] Since the backrest foam 5 is fixed on the support back plate 3 in a ring sleeve manner and does not completely cover the rear side of the backrest framework, in order to make the overall structure beautiful, as shown in Figure 10 , a cover plate 6 is fixedly assembled on the rear side of the backrest framework. In combination with Figure 9 , in the embodiment, the first wrapping structure 51 is provided with a second connecting structure 53 which is recessed towards the inside of the backrest, the recessed depth of the second connecting structure 53 is adapted to the thickness of the cover plate 6, and the second connecting 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 with the back side of the backrest foam 5 to form a whole, so as to ensure the beauty of the overall seat backrest.

[0056] Please refer to Figure 9The back side of the back foam 5 is provided with a plurality of protrusions 54, and the protrusions 54 are provided with clamping grooves b for mounting back functional components, which can be a ventilation device and a massage device and the like that need to be arranged in the back. In combination 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 components, and the protrusions 54 can be exposed in the space surrounded by the arc-shaped arch structure, so that the functional components can be better embedded in the back, without occupying the external space of the seat, and have the advantages of high integration, compact structure, neat and beautiful appearance, convenient installation, and the like, and can select whether to install such functional components according to the needs of the user.

[0057] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and those of ordinary skill in the art can make various similar modifications under the inspiration of the present application without departing from the purpose and scope of the present application. Such changes fall within the scope of the present application.

Claims

1. A backrest framework, characterized in that, Comprising: A lower support member (1) for supporting the lower middle segment of the user's back, the upper end of the lower support member (1) is fixedly connected with an upwardly extending upper support member (2) for supporting the upper middle segment of the user's back; Both ends of the lower support member (1) are provided with an assembly seat (9) for rotatingly mounting to the rear end of the seat frame; The upper support member (2) is a long strip-shaped member, the cross section of which has an n-shaped structure and a support flange (21) extending outwardly from the lower ends of both sides of the n-shaped structure, the front side of the lower support member (1) and the upper support member (2) is fixedly provided with a support back plate (3), the middle lower part of the support back plate (3) is designed as a hollow structure, the circumferential edge of the hollow area of the middle lower part of the support back plate (3) is fixedly connected to the lower support member (1), the rear side of the support back plate (3) is formed with a positioning groove (32) matched with the n-shaped structure, the areas on both sides of the support back plate (3) corresponding to the positioning groove (32) are locked on the support flange (21) by fasteners (7); The upper end edge of the hollow area of the middle lower part of the support back plate (3) is provided with a connecting lug (3a), 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).

2. The backrest framework of claim 1, characterized in that: The lower support member (1) is configured as an arc-shaped arch structure.

3. The backrest framework of claim 2, wherein: 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 framework of claim 1, wherein: The circumferential edge of the support back plate (3) is provided with a flange side wing (31) protruding forward, and the height of the flange side wing (31) gradually increases from top to bottom.

5. A seat back, characterized by: The backrest framework of claim 1 further comprises a backrest foam (5) made by a 3D printing process, the rear side of the backrest foam (5) is provided with a first wrapping structure (51) surrounding the circumferential edge of the support back plate (3).

6. The seat back of claim 5, wherein: The backrest foam (5) is made of thermoplastic polyurethane rubber; And / or the surface of the backrest foam (5) is covered with a surface cover, and the rear side of the backrest framework is covered with a cover plate (6); And / or the middle and / or both side areas of the backrest foam (5) are integrally printed and formed with soft support areas (a).

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