Vehicle Seat Linkage Layout for Multi-Posture Adjustment
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Solution Overview
Problem
Existing vehicle seat configurations with multiple length adjustment portions driven by separate motors are complex and costly, and can lead to increased deformation angles of the seat back during rear collisions due to asymmetrical support.
Innovation Solution
A vehicle seat design featuring a pair of support rails with a first slide unit and a second slide unit, connected by link members, which allows for adjustable cushion side frames and a reclining unit, powered by motors to enable various postures while maintaining a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple length adjustment portions driven by separate motors are used to enable various postures, then user convenience and posture adjustability are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple length adjustment portions into a single integrated mechanism. The first and second link members work together with a single motor to achieve both cushion angle adjustment and seat back recline, merging functions that would traditionally require separate motors and mechanisms.
Solution Approach 2:
The single motor system is designed to perform multiple functions: adjusting the cushion angle via the first link member and adjusting the seat back recline angle via the second link member. This multi-functional design eliminates the need for separate dedicated motors for each adjustment function.
2Device complexity
If the second length adjustment portion is disposed only on one side of the seat, then device complexity is reduced, but crashworthiness and structural stability deteriorate during rear collisions
Solution Approach 1:
The patent intentionally uses asymmetrical positioning of the second link member on only one side of the seat, accepting the asymmetrical nature as a design choice that reduces complexity while managing crashworthiness through other means such as the overall structural design and material selection.
Solution Approach 2:
The patent extracts the second length adjustment portion from a symmetrical dual-sided configuration and positions it only on one side, removing unnecessary components while maintaining essential functionality through the coordinated action of the first and second link members.
3Device complexity
If the second length adjustment portion is disposed only on one side of the seat, then device complexity is reduced, but deformation angle control during rear collisions deteriorates
Solution Approach 1:
The patent segments the seat adjustment system into two independent but coordinated link members, where the first link member handles cushion angle and the second link member handles seat back recline. This segmentation allows each component to be optimized for its specific function while working together to achieve overall stability.
Solution Approach 2:
The patent employs dynamic adjustment capabilities where the link members can change length and angle during operation, allowing the seat structure to adapt and maintain stability during rear collisions by dynamically adjusting the cushion and seat back angles to distribute forces more effectively.
Data Source
AI summary
A seat for a vehicle in which user convenience may be improved by implementing various postures with a simple configuration is provided. The seat for a vehicle includes a pair of support rails coupled to the vehicle and arranged to be spaced apart from side to side, a first slide unit slidably installed back and forth on the support rail, a second slide unit slidably installed back and forth on the first slide unit, a pair of cushion side frames spaced apart from side to side, a first link member connecting the cushion side frame and the first slide unit, and a second link member connecting the cushion side frame and the second slide unit.