Motor Vehicle Seat Depth Adjustment With Integrated Cushion Guide
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Solution Overview
Problem
Existing seat depth adjustment mechanisms for motor vehicle seats are not easily assembled, compact, or adaptable to varying conditions, lacking a unified and space-efficient design that integrates the adjusting unit and guide device for cushion material.
Innovation Solution
A compact seat depth adjustment system where the adjusting unit and guide device for cushion material form a single unit, featuring a housing with dual adjustment surfaces and a motor-driven spindle mechanism, allowing for preassembly and easy integration with the seat pan, with a guide plate and pinion system to manage the cushion material's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate adjusting unit and guide device are used, then functionality is complete, but device complexity and assembly difficulty increase
Solution Approach 1:
The patent combines the adjusting unit for the seat depth adjustment part and the guide device for the cushion material into a single integrated unit. The housing of the adjusting unit serves as the plate of the guide device, eliminating the need for separate components. This merging reduces device complexity and assembly steps while maintaining full functionality of both the seat depth adjustment and cushion material guidance.
2Ease of manufacture
If separate adjusting unit and guide device are used, then functionality is complete, but assembly time and manufacturing complexity increase
Solution Approach 1:
The housing of the adjusting unit is designed to simultaneously serve as the plate of the guide device, creating a unified component that reduces the total number of parts. This integration enables preassembly of the combined unit before installation into the seat, simplifying manufacturing processes and reducing assembly time while maintaining the necessary functionality of both subsystems.
3Volume of moving object
If compact design is implemented, then space efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The adjusting unit is positioned within the housing that serves as the guide device plate, creating a nested arrangement where components are space-efficiently organized. The spindle mechanism is housed within the adjusting unit housing, and the pinion is mounted within the same housing that forms the guide device. This nesting achieves compact volume while using standard manufacturing tolerances through proven mechanical design.
4Volume of moving object
If integrated unit is used, then compactness improves, but protection of adjusting elements becomes more challenging
Solution Approach 1:
The housing of the adjusting unit serves dual purposes: it contains and protects the adjusting elements (spindle, nut, pinion) while simultaneously functioning as the plate of the guide device. This integrated housing provides structural protection for the precision adjusting elements while maintaining the compact design, as the same components that form the external structure also serve as protective enclosures.
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
The solution enables a compact, easily assembled, and adaptable seat depth adjustment system that ensures protected and efficient operation, allowing for space-saving design and simple assembly while maintaining the seat's functionality and comfort.
Implementation Method 1
which meshes with a pinion rotatably mounted in the housing, which simultaneously engages in teeth which are fixed relative to the seat pan, such that with a movement of the housing the pinion is rotated and by its engagement in the hole toothing the plate of the guide device for the cushion material containing the hole toothing covers double the path of the adjustment path of the adjusting unit
Implementation Method 2
the housing of the adjusting unit is connected to a motor which drives a spindle adjusting the housing
Data Source
AI summary
A device for adjusting the seat depth of a motor vehicle seat includes a seat depth adjustment part which is movable relative to a seat lower part of the motor vehicle seat substantially in the direction of travel, an adjusting unit for the seat depth adjustment part as well as a guide device for cushion material covering the seat depth adjustment part. The adjustment unit for the seat depth adjustment part as well as the guide device for the cushion material form one unit.