Vehicle Seat Under-Frame with Integrated Height Adjustment
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Solution Overview
Problem
The existing under-frames for motor vehicle seats are complex and costly, making it difficult to manufacture an economical, lightweight, and simply configured seat that offers adjustable comfort for individual users while maintaining safety and operational simplicity.
Innovation Solution
The under-frame incorporates a pinion gear connected to an adjustment device for seat frame position changes, a torsion bar spring for compression support, and a pair of vibration levers for height adjustment, allowing for easy manual or motor-driven seat position adjustments without the need for additional components, ensuring a comfortable and safe seating experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple adjustment possibilities are provided for seat position, then user comfort and adaptability are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The vibration lever serves multiple functions: it acts as both a suspension element for absorbing road shocks and a transmission mechanism for seat position adjustment. By integrating these functions into a single component, the patent reduces the number of separate parts needed while maintaining both comfort and adjustability capabilities
Solution Approach 2:
The patent combines the adjustment arm with the vibration lever by joint-connecting them, creating an integrated assembly that reduces part count. The adjustment arm lever utilizes the vibration lever's movement to achieve seat position changes, merging adjustment functionality into the existing suspension structure
2Adaptability or versatility
If multiple adjustment possibilities are provided for seat position, then user comfort and adaptability are improved, but material cost and manufacturing cost increase
Solution Approach 1:
The vibration lever performs dual functions as both a suspension component and an adjustment transmission mechanism, eliminating the need for separate adjustment linkages and reducing overall material requirements while maintaining adjustment capabilities
Solution Approach 2:
The spring member automatically returns the vibration lever to its initial position after adjustment, eliminating the need for additional resetting mechanisms or complex control systems, thereby simplifying manufacturing
3Adaptability or versatility
If the seat frame is made adjustable between utmost front and rear positions, then individual user comfort is improved, but structural complexity increases
Solution Approach 1:
The vibration lever serves dual purposes as both a suspension element and the primary transmission mechanism for seat length adjustment, reducing the need for separate adjustment linkages and simplifying the overall structure
Solution Approach 2:
The adjustment mechanism is divided into discrete, modular components including the adjustment arm, vibration lever, and pinion gear, allowing for simplified assembly and maintenance while achieving full adjustment capability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for economical and simple manufacturing of the under-frame while providing convenient and precise seat adjustments, ensuring a comfortable seating experience with reduced material costs and enhanced safety features.
Implementation Method 1
a torsion bar spring to which a spring member for applying a compression stress to the seat frame toward a starting position is fixed practically without gap is provided
Data Source
AI summary
An under-frame apparatus for a motor vehicle seat may include a basic body, a seat frame adjustable with respect to the basic body between an utmost rear and front positions, a pair of front and rear vibration levers joint-connected to the basic body and the seat frame, respectively, an adjustment arm joint-connected one of the front and rear vibration levers and including a saw teeth engagement part on a free end region thereof, an adjustment device rotatably coupled to the seat frame and engaged to the free end region to adjust a position of the seat frame with respect to the basic body, wherein the adjustment device includes a pinion gear engaged to the adjustment arm and driven by an operation unit, and an elastic member attached to the seat frame and applying a restoring force to the seat frame toward a starting position.