Lumbar support assembly
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Solution Overview
Problem
Existing lumbar support systems for vehicles are heavy and costly due to their complex component structures, which hinders weight reduction and performance enhancement.
Innovation Solution
A lumbar support assembly that controls the inclination of a mat via upward and downward movement of a single nut, utilizing a driving unit with a motor-connected gear system and tension units with cables, allowing for reduced component count and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If existing lumbar support structures are used, then support function is provided, but weight and manufacturing cost increase due to complex component structures
Solution Approach 1:
The patent combines multiple functions into a single integrated mat structure that serves as both the support surface and the mechanical linkage element. The mat is directly connected to the seat frame and the driving unit, eliminating the need for separate linkages, brackets, and mounting hardware that would traditionally be required, thereby reducing overall component count and weight while maintaining structural integrity and support functionality.
Solution Approach 2:
The mat structure is designed to perform multiple functions simultaneously: it provides the lumbar support surface, acts as a structural connector between the driving unit and seat frame, serves as a cable routing guide, and functions as a mounting platform for the tension units. This multi-functionality eliminates the need for dedicated components for each function, reducing complexity and weight.
2Ease of operation
If multiple components are used for mat inclination control, then precise control is achieved, but manufacturing cost and weight increase
Solution Approach 1:
The patent replaces complex mechanical inclination control mechanisms (such as multiple linkages, pivots, and adjustment mechanisms) with a cable-tension-based system. The tension units use cables that can be easily routed and adjusted, allowing mat inclination control through simple tensioning and releasing actions. This substitution dramatically simplifies the manufacturing process while maintaining precise control capability.
Solution Approach 2:
The invention controls mat inclination by changing the tension parameter of the cables rather than through mechanical geometry changes. By adjusting cable tension through the driving unit, the mat can be inclined to various positions. This parameter-based control is simpler to manufacture and adjust compared to fixed mechanical linkages, as it allows for continuous adjustment without requiring multiple discrete mechanical components.
3Reliability
If complex tension units are used, then reliable mat positioning is achieved, but ease of repair and maintenance deteriorates
Solution Approach 1:
The tension unit system is segmented into modular components: separate cables, individual tensioning mechanisms, and discrete mounting points. This segmentation allows any single cable or tension unit to be independently accessed, removed, or replaced without affecting the entire system. The mat itself is designed as a separate replaceable component, enabling easy maintenance and repair while maintaining reliable positioning through the modular architecture.
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 weight reduction and cost-effectiveness by simplifying the component structure while maintaining effective support for the occupant's upper body, improving fuel efficiency and ease of maintenance.
Implementation Method 1
a second end that extends downward and is screwed to the nut while passing through the nut
Implementation Method 2
a tension unit having first and second sides that are respectively coupled to the first and second sides of the seat frame, and coupled to the nut while surrounding a rear portion of the mat
Data Source
AI summary
The disclosure relates to a lumbar support assembly, wherein the inclination of a mat is controlled by upward and downward movement of a single nut, thereby making it possible to reducing weight and manufacturing cost of the assembly. According to one embodiment of disclosed herein, a lumbar support assembly includes: a mat having opposite sides that are rotatably connected to opposite sides of a seat frame, respectively; a driving unit coupled to the mat, and including a nut that is configured to be moved upward and downward; and a tension unit having first and second sides that are respectively coupled to the first and second sides of the seat frame, and coupled to the nut while surrounding a rear portion of the mat, wherein the nut allows the mat to be moved frontward or rearward by pulling or loosening the tension unit according to direction of movement.