Adjustment device for a seat
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Solution Overview
Problem
Existing seat adjustment mechanisms lack the ability to provide a seamless integration of seat depth adjustment and leg rest adjustment, often resulting in gaps or inefficiencies in support surfaces.
Innovation Solution
A length-adjustable seat adjustment device with a central winding roller, sliding rollers, and tension elements that allow for simultaneous extension and retraction of the seat surface, integrating seat depth and leg rest functions through a compact mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate adjustment mechanisms are used for seat depth and leg rest, then each function can be adjusted independently, but the device complexity increases and installation space is inefficiently used
Solution Approach 1:
The patent combines two separate adjustment mechanisms (seat depth adjustment and leg rest adjustment) into a single integrated mechanism. The adjustment device includes a support element with a support surface that can be adjusted in position, and a leg rest that is coupled to the support element and can be adjusted relative to it. This merging eliminates the need for separate mechanisms, reducing overall device complexity while maintaining both adjustment functions simultaneously.
Solution Approach 2:
The support element serves multiple functions: it provides the seat cushion support surface, acts as a structural component for the leg rest attachment, and serves as the adjustment mechanism carrier. The single adjustment device controls both the seat depth (by moving the support element) and the leg rest position (by moving the leg rest relative to the support element), making the system multi-functional and reducing the number of required components.
2Adaptability or versatility
If separate adjustment mechanisms are used for seat depth and leg rest, then each function can be adjusted independently, but the installation space required increases
Solution Approach 1:
The patent merges seat depth adjustment and leg rest adjustment into a single compact mechanism located within the seat cushion structure. The support element with its support surface and the coupled leg rest share common adjustment components, allowing both functions to be controlled from a single location. This integration significantly reduces the installation space required compared to having separate mechanisms for each function.
3Device complexity
If a single integrated adjustment mechanism is used for both seat depth and leg rest, then device complexity and installation space are reduced, but the ability to independently adjust each function may be compromised
Solution Approach 1:
The adjustment device is segmented into distinct functional components: the support element with support surface for seat depth adjustment, and the coupled leg rest with its own adjustment capability. The support element can be moved to adjust seat depth, while the leg rest can be independently adjusted relative to the support element. This segmentation allows independent control of each function while maintaining a single integrated mechanism, preventing interference between adjustments.
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 device provides a gap-free, expandable support surface for thighs and lower legs, combining seat depth and leg rest adjustments with a single kinematic system, enhancing comfort and efficiency in seat design.
Implementation Method 1
the at least one tension element slides and/or rolls on the sliding rollers and/or along the sliding rollers
Data Source
AI summary
An adjustment device for a seat, which is designed as an extension of a seat plane of the seat. The adjustment device has a length-adjustable adjustment mechanism and at least one elastic tension element. The adjustment mechanism has a central winding roller, multiple sliding rollers, at least one front end part, and at least one rear end part. Each end part is connected to at least one sliding roller. A first end of the at least one tension element is fastened to the central winding roller. The at least one tension element, starting from the central winding roller, touches the sliding rollers. A second end of the at least one tension element is fastened to a fastening element of a supporting body of the seat plane.