High-strength automobile seat foaming structure
By embedding EPP boards and designing a perforated structure in the headrest and backrest foam structure of car seats, the problem of insufficient impact resistance of traditional seat foam structures is solved, achieving high strength and lightweight effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional car seat foam structures have insufficient impact resistance, and the headrest rods and headrest tubes are easily damaged. In addition, the metal frame has problems such as heavy weight, complex molding, and interface delamination.
EPP boards are embedded in the foam structure of the headrest and backrest, and perforated or grooved structures are designed on the EPP boards. The foam material fills these structures during the foaming process to form an anchoring effect and enhance the interfacial bonding strength between the foam and the EPP board.
It significantly improves the local load-bearing capacity of the headrest rod and headrest insertion tube, achieves lightweight design, enhances pull-out resistance, avoids delamination risk, and meets the weight reduction requirements of the automotive industry.
Smart Images
Figure CN224090077U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive seat technology, and in particular to a high-strength automotive seat foam structure. Background Technology
[0002] With the automotive industry's increasing demands for lightweighting, safety, and ride comfort, the structural design of car seats faces higher standards. Among these, the headrest and backrest, as key components in the seating system that directly contact the occupant's head and back, have their supporting structure's strength and stability directly impacting collision safety performance and long-term durability. Traditional seat foam has relatively low strength, particularly in the foamed area corresponding to the back of the headrest rod and headrest insert (usually a metal tube welded to the backrest frame to secure the headrest guide sleeve). When this area receives an impact load, the seat foam's impact resistance is limited, making it difficult to effectively disperse collision energy and easily leading to damage to the headrest rod and insert. Furthermore, traditional car seats typically use a combination of polyurethane foam and a metal frame to increase foam strength. While the metal frame provides basic support, it suffers from significant weight, complex molding processes, and the difference in thermal expansion coefficients between the metal and the foam material can easily lead to interfacial delamination. Utility Model Content
[0003] In view of the problems existing in the prior art, the present invention aims to provide a high-strength car seat foam structure to reduce the risk of damage to the headrest rod and headrest tube.
[0004] To achieve the above objectives, this utility model proposes a high-strength automotive seat foam structure, including headrest foam and backrest foam. A first EPP plate is embedded in the back of the headrest foam in the area corresponding to the headrest rod, and a second EPP plate is embedded in the back of the backrest foam in the area corresponding to the headrest insertion tube. The first EPP plate is integrally foamed with the headrest foam, and its surface is flush with the back of the headrest foam. The second EPP plate is integrally foamed with the backrest foam, and its surface is flush with the back of the backrest foam. The first and second EPP plates are provided with perforated or grooved structures. During the foaming process, the headrest foam and backrest foam fill the corresponding perforations or grooves to form an anchoring structure.
[0005] In the above scheme: the first EPP board has two through holes spaced apart, and the side of the first EPP board near the headrest foam also has two rows of blind holes. During the foaming process, the headrest foam fills the through holes and blind holes to form an anchoring structure. The structural design combining through holes and blind holes effectively increases the contact interface between the headrest foam and the first EPP board, ensuring that the first EPP board and the headrest foam can achieve high-strength anchoring.
[0006] In the above scheme: two rows of blind holes are located at the upper and lower ends of the first EPP board, and two through holes on the first EPP board are located in the middle. The through holes facilitate the flow and filling of foam material, and their location in the middle of the first EPP board helps to reduce the risk of cracking of the first EPP board.
[0007] In the above scheme: the second EPP board has several through holes and a row of grooves. During the foaming process, the backrest foam fills the through holes and grooves to form an anchoring structure. The structural design combining through holes and grooves effectively increases the contact interface between the backrest foam and the second EPP board, ensuring that the second EPP board and the backrest foam can achieve high-strength anchoring.
[0008] In the above scheme: the second EPP board is inverted "L" shape, the through holes are arranged on the top and side surfaces of the second EPP board, and the grooves are arranged at the back corners of the second EPP board. The arrangement of the through holes and grooves at the above positions facilitates the flow and filling of the foam material, and can provide tensile strength in both the horizontal and vertical directions to prevent the backrest foam from separating from the second EPP board.
[0009] The beneficial effects of this utility model are as follows: 1. By embedding an EPP board (foamed polypropylene), its high impact resistance and low density significantly improve the local load-bearing capacity of the corresponding foamed areas of the headrest rod and headrest insertion tube, while achieving lightweight design, meeting the weight reduction requirements of the automotive industry. 2. The porous or grooved structure enables the foamed material and the EPP board to form a three-dimensional mechanical interlock, greatly improving the interface bonding strength, increasing the pull-out resistance, and avoiding the delamination risk caused by traditional bonding or simple embedding. Attached Figure Description
[0010] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0011] Figure 1 This is a schematic diagram showing the combination of the headrest foam and the first EPP board.
[0012] Figure 2 This is a schematic diagram showing the positions of the first and second EPP plates on the seat frame.
[0013] Figure 3 yes Figure 2 A diagram from another angle.
[0014] Figure 4 This is a structural diagram of the first EPP board and the second EPP board.
[0015] Figure 5 yes Figure 4 A diagram from another angle. Detailed Implementation
[0016] like Figure 1 As shown in Figure 5, a high-strength automotive seat foam structure mainly consists of headrest foam 1, backrest foam, first EPP board 3, and second EPP board 5.
[0017] The back of the headrest foam 1 is fitted with a first EPP plate 3 in the area corresponding to the headrest rod 2, and the back of the backrest foam is fitted with a second EPP plate 5 in the area corresponding to the headrest insertion tube 4 (usually a metal tube welded to the backrest frame for fixing the headrest guide sleeve). The first EPP plate 3 is integrally foamed with the headrest foam 1, and its surface is flush with the back of the headrest foam 1. The second EPP plate 5 is integrally foamed with the backrest foam, and its surface is flush with the back of the backrest foam.
[0018] The first EPP board 3 and the second EPP board 5 are provided with a hole-like or grooved structure. The headrest foam 1 and the backrest foam fill the corresponding holes or grooves during the foaming process to form an anchoring structure.
[0019] Ideally, the first EPP plate 3 has two through holes 6 spaced apart, and the side of the first EPP plate 3 near the headrest foam 1 also has two rows of blind holes 7. During the foaming process, the headrest foam 1 fills the through holes 6 and blind holes 7 to form an anchoring structure. The structural design combining through holes 6 and blind holes 7 effectively increases the contact interface between the headrest foam 1 and the first EPP plate 3, ensuring that the first EPP plate 3 and the headrest foam 1 can achieve high-strength anchoring.
[0020] Ideally, the two rows of blind holes 7 are located at the upper and lower ends of the first EPP board 3, and the two through holes 6 on the first EPP board 3 are located in the middle. The through holes 6 facilitate the flow and filling of the foam material, and their location in the middle of the first EPP board 3 helps to reduce the risk of cracking of the first EPP board 3.
[0021] Ideally, the second EPP board 5 has several through holes 6 and a row of grooves 8. During the foaming process, the backrest foam fills the through holes 6 and grooves 8 to form an anchoring structure. The structural design combining through holes 6 and grooves 8 effectively increases the contact interface between the backrest foam and the second EPP board 5, ensuring that the second EPP board 5 and the backrest foam can achieve high-strength anchoring.
[0022] Ideally, the second EPP board 5 is inverted "L" shape, with through holes 6 arranged on the top and side surfaces of the second EPP board 5, and grooves 8 arranged at the corners of the back of the second EPP board 5. The arrangement of through holes 6 and grooves 8 in the above positions facilitates the flow and filling of the foam material, and provides tensile strength in both the horizontal and vertical directions to prevent the backrest foam from separating from the second EPP board 5.
Claims
1. A high-strength automotive seat foam structure, comprising headrest foam (1) and backrest foam, characterized in that: The back of the headrest foam (1) is fitted with a first EPP plate (3) in the area corresponding to the headrest rod (2), and the back of the backrest foam is fitted with a second EPP plate (5) in the area corresponding to the headrest insertion tube (4). The first EPP plate (3) is integrally foamed with the headrest foam (1), and its surface is flush with the back of the headrest foam (1). The second EPP plate (5) is integrally foamed with the backrest foam, and its surface is flush with the back of the backrest foam. The first EPP plate (3) and the second EPP plate (5) are provided with hole-like or groove structures. The headrest foam (1) and the backrest foam fill the corresponding holes or grooves during the foaming process to form an anchoring structure.
2. The high-strength automotive seat foam structure according to claim 1, characterized in that: The first EPP plate (3) is provided with two through holes (6) spaced apart. The side of the first EPP plate (3) near the headrest foam (1) is also provided with two rows of blind holes (7). The headrest foam (1) fills each through hole (6) and blind hole (7) during the foaming process to form an anchoring structure.
3. The high-strength automotive seat foam structure according to claim 2, characterized in that: Two rows of blind holes (7) are located at the upper and lower ends of the first EPP plate (3), and two through holes (6) on the first EPP plate (3) are located in the middle.
4. The high-strength automotive seat foam structure according to claim 1, characterized in that: The second EPP board (5) is provided with several through holes (6) and a row of grooves (8). The backrest foam fills each through hole (6) and groove (8) during the foaming process to form an anchoring structure.
5. The high-strength automotive seat foam structure according to claim 4, characterized in that: The second EPP plate (5) is inverted "L" shape, the through holes (6) are arranged on the top and side surfaces of the second EPP plate (5), and the grooves (8) are arranged at the back corners of the second EPP plate (5).