Adjustable Vehicle Seat Front Edge for Wrinkle-Free Depth Change
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Solution Overview
Problem
Existing seat depth adjustment systems in motor vehicle seats face challenges in ensuring consistent padding quality and minimizing wrinkles and gaps in the cover fabric as the seat depth is adjusted, as the padding must adapt to length variations and the cover must be reconfigured accordingly.
Innovation Solution
A system utilizing a toothed rack and gears to convert linear movement into rotational movement, allowing for synchronized adjustment of multiple seat parts, including a third seat part that forms the front edge, to facilitate better cover adaptation and minimize gaps and wrinkles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the seat depth is adjusted using conventional adjustment devices, then the seat depth is changed, but the padding quality becomes inconsistent and wrinkles/gaps occur in the cover
Solution Approach 1:
The seat cushion is divided into multiple independently adjustable seat parts (first seat part, second seat part, third seat part) that can move relative to each other. This segmentation allows each part to be adjusted individually, maintaining consistent padding quality in each segment while achieving overall seat depth adjustment without cover wrinkles or gaps.
2Adaptability or versatility
If the seat depth is adjusted, then the seat depth changes, but the cover fabric develops wrinkles and gaps
Solution Approach 1:
The seat parts are designed with dynamic adjustment capabilities, allowing them to move relative to each other along guidance elements. This dynamic configuration enables the seat parts to adapt their positions to maintain cover fabric smoothness during adjustment, preventing wrinkles and gaps while achieving desired seat depth changes.
3Measurement precision
If multiple seat parts are adjusted independently, then seat depth adjustment precision improves, but the device complexity increases
Solution Approach 1:
Multiple adjustment functions are merged into a coordinated system where the motor drive unit adjusts both the longitudinal position of the second seat part relative to the first seat part and the longitudinal position of the third seat part relative to the second seat part. This combining of adjustment functions achieves precise seat depth control while managing device complexity through integrated control.
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 solution enables easier adjustment of the seat depth while maintaining consistent padding quality and reducing wrinkles and gaps in the cover fabric, allowing for a more favorable configuration of the seat parts and cover fabric.
Implementation Method 1
there is provided a primary gear meshing with the toothed rack, that there is provided a secondary gear in rotating communication with the primary gear
Implementation Method 2
a toothed rack extending substantially in the first seat direction is connected to the second seat part, that there is provided a primary gear meshing with the toothed rack
Implementation Method 3
there is provided a third seat part that is slidably disposed in the second seat direction and that is connected to the toothed bar
Data Source
AI summary
The seat depth adjustable motor vehicle seat comprises a first seat part, a second seat part and a longitudinal adjustment device interposed between the first seat part and the second seat part and allowing for displacement movement in a first seat direction of the first seat part relative to the second seat part. The seat further comprises a toothed rack connected to the second seat part and extending substantially in the first seat direction. A primary gear meshes with the toothed rack. A secondary gear is in rotating communication with the primary gear. A toothed bar extends substantially in a second seat direction and engages the secondary gear. A third seat part is slidably disposed in the second seat direction and is connected to the toothed bar.