ISOFIX Interface Structure for Vehicle Seat
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Solution Overview
Problem
The existing ISOFIX interface structures in vehicle seats cause uneven pressure on seat cushions, leading to wrinkles and installation difficulties due to symmetry differences, making it hard to securely mount child safety seats.
Innovation Solution
The ISOFIX interface structure includes a base and cover with detachable caps, mounted on the seat frame, which covers the ISOFIX interfaces through holes, preventing foam collapse and ensuring symmetry, with features like projecting protrusions, support mounts, and bayonet connectors for easy installation and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ISOFIX interfaces are mounted directly on the seat frame with surrounding sleeve surfaces, then the child safety seat can be securely retained, but the pressure exerted by the sleeve surfaces causes wrinkles around the seat cushion foam and affects appearance
Solution Approach 1:
A cover component is introduced as an intermediary element between the ISOFIX interface and the seat cushion foam. The cover includes a mounting seat with sleeve surfaces that contact the ISOFIX interface, while the outer surface of the cover contacts the seat cushion foam. This intermediary structure prevents direct pressure transmission from the ISOFIX interface to the foam, eliminating wrinkles while maintaining secure child safety seat retention.
2Ease of manufacture
If the seat frame is subjected to greater tolerances during manufacturing, then the manufacturing cost is reduced, but the two ISOFIX interfaces exhibit symmetry differences making child safety seat installation difficult
Solution Approach 1:
The cover component introduces a standardized symmetric interface layer that compensates for asymmetries in the underlying seat frame. The mounting seat and sleeve surfaces of the cover are manufactured with precise tolerances, creating a uniform interface for ISOFIX connections regardless of variations in the seat frame. This allows the seat frame to be manufactured with greater tolerances while maintaining consistent ISOFIX interface symmetry for easy child safety seat installation.
3Reliability
If the ISOFIX interface components are made more complex to ensure symmetry and prevent foam collapse, then the interface reliability is improved, but the device complexity increases
Solution Approach 1:
The ISOFIX interface system is segmented into distinct functional components: the seat frame, the cover with mounting seat, and the ISOFIX interface elements. The cover is further segmented into an inner surface with mounting seat (for structural connection) and an outer surface (for foam contact). This segmentation allows each component to be optimized independently - the mounting seat ensures symmetry and structural integrity, while the outer surface prevents foam contact issues, achieving high reliability without excessive overall complexity.
Data Source
AI summary
The present invention provides an ISOFIX interface structure of a vehicle seat. The ISOFIX interface structure of the vehicle seat comprises a shroud mounting base and two ISOFIX shrouds. Two mounting holes are formed in the shroud mounting base, and the mounting holes are penetrated from front to rear. The two ISOFIX shrouds can correspondingly be inserted into the corresponding mounting holes and can be detachably mounted on the shroud mounting base. According to the ISOFIX interface structure of the vehicle seat, the structure is novel, neat, attractive, and easy to realize. The problem is that conventional ISOFIX interfaces collapse surrounding seat foam when being installed. Here, consistency of the two ISOFIX interfaces on the same vehicle seat is guaranteed, the subsequent installation of a child safety seat is convenient, and the assembly and disassembly efficiency of the child safety seat can be effectively improved.