Front Seat Rail Assembly for Fold-Flat Backrest Clearance
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Solution Overview
Problem
Existing automobile front seats with forward tipping backrests face limitations in space utilization due to interference between the seat cushion and backrest, compromising comfort and functionality, particularly when integrating seat cushion forward movement and height adjustment functions.
Innovation Solution
The seat cushion is designed with a sliding rail assembly and integrated mechanisms allowing independent forward movement and vertical adjustment, enabling the backrest to fold forward at a large angle while maintaining height adjustment capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the seat cushion is given an individual forward moving function to increase the folding space under the backrest, then the backrest can be flattened forward at a large angle, but additional transmission components are required making it difficult to also give consideration to the height adjustment function
Solution Approach 1:
The patent combines the height adjustment function and forward moving function into a single integrated mechanism. The seat cushion framework is mounted on the upper sliding rail module, which provides both vertical height adjustment and forward/backward movement capabilities through integrated sliding and rotating components, eliminating the need for separate transmission systems
Solution Approach 2:
The upper sliding rail module serves multiple functions simultaneously: it provides height adjustment for the seat cushion, enables forward/backward movement of the seat cushion, and allows the backrest to rotate forward at large angles. This multi-functional design reduces overall system complexity while achieving multiple objectives
2Ease of operation
If the seat cushion moves forward individually to eliminate interference with space under the backrest, then the backrest framework can fold forward, but the height adjustment function may be compromised
Solution Approach 1:
The patent segments the seat structure into independent adjustable components: the seat cushion framework can move forward independently on the upper sliding rail module, while the backrest framework rotates independently on the adapter component. This segmentation allows each component to perform its function without interfering with the other, maintaining both backrest folding capability and height adjustment function
Data Source
AI summary
An automobile front seat may have a sliding rail assembly having a lower sliding rail module and an upper sliding rail module. The upper sliding rail module may have an adapter component. A backrest framework may be rotatably mounted on the adapter component. A first driving assembly that rotates the backrest framework may be on the backrest framework. A seat cushion framework may be on the upper sliding rail module. A height adjustment mechanism may be used for the seat cushion framework to move vertically relative to the upper sliding rail module. A front-rear adjustment mechanism may be located between the seat cushion framework and the upper sliding rail module. The front-rear adjustment mechanism may be used for driving the seat cushion framework to move forward and backward relative to the upper rail module