Vehicle Seat Upward Movement Suppression Structure
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Solution Overview
Problem
Existing vehicle seat designs face challenges in maintaining seat position during collisions due to potential dislocation of sliding members from rail members under high upward loads, leading to inadequate passenger protection and operability issues.
Innovation Solution
A vehicle seat passenger protection structure featuring rail members with open cross-sectional shapes and slits, sliding members connected to the seat cushion, and upward movement suppression members that anchor to the sliding members, restricting upward movement and dispersing loads through a cross member, while also reducing noise and improving operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sliding members are engaged with rail members to enable seat sliding, then seat operability is improved, but sliding members may dislocate from rail members under high collision loads
Solution Approach 1:
The upward movement suppression members are pre-installed on the rail members with fixing portions that can pass through slits. When collision loads attempt to pull sliding members upward, the suppression members already occupy the slits and prevent dislocation, acting in advance to counteract the harmful upward movement force
Solution Approach 2:
The upward movement suppression members serve as intermediary elements between the sliding members and rail members. The fixing portions of the suppression members pass through the slits in the rail members and engage with the sliding members, creating an intermediate connection that prevents direct dislocation while maintaining sliding functionality
2Reliability
If upward movement suppression members are added to prevent dislocation, then connection reliability is improved, but device complexity increases
Solution Approach 1:
The upward movement suppression members perform multiple functions: they prevent upward dislocation of sliding members during collisions, maintain operational reliability, and can be integrated with existing rail member structures. The fixing portions that pass through slits serve both as connection elements and as positional constraints
Solution Approach 2:
The fixing portions of the upward movement suppression members are nested within the slit portions of the rail members. This nested configuration allows the suppression members to be integrated into the existing rail structure without requiring separate mounting spaces, reducing overall structural complexity
Data Source
AI summary
There is provided a vehicle seat passenger protection structure, including: rail members that are fixed to a floor of a vehicle, and have, in lower surfaces thereof, slit portions that extend in the seat longitudinal direction; sliding members that are connected to a lower portion of a seat cushion, and are disposed at interiors of the rail members, and are supported so as to be slidable in the seat longitudinal direction by the rail members; and upward movement suppressing members that include main body portions, which are disposed so as to face lower surfaces of the rail members, and fixing portions, which project out toward a seat upper side from the main body portions and pass through the slit portions and are fixed to lower surfaces of the sliding members, and that can move in the seat longitudinal direction following the sliding members.