Adjustable Lumbar Support With Rotating Height-Set Backrest Fit
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Solution Overview
Problem
Existing lumbar supports for chairs are rigid and complex, failing to provide effective and ergonomic adjustments for long-term sitting comfort.
Innovation Solution
A lumbar support system with a frame, anchoring extensions, and a rotatable support device that can be adjusted in height and orientation, featuring a simplified design with only four main parts, allowing for easy manual adjustment and ergonomic alignment with the user's spine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional lumbar support with screw adjustment is used, then the lumbar support can be adjusted in position, but the device becomes rigid and complex with many parts
Solution Approach 1:
The lumbar support is divided into a frame portion and a support portion that can be independently adjusted. The support portion is segmented into multiple discrete positions along the frame, allowing selective engagement at different heights and orientations without requiring complex continuous adjustment mechanisms
Solution Approach 2:
The lumbar support transitions from a rigid fixed structure to a dynamic adjustable structure. The support portion can be manually repositioned between discrete locations on the frame and rotated about the longitudinal axis, providing adaptability while maintaining structural simplicity through selective engagement rather than continuous adjustment
2Adaptability or versatility
If the lumbar support is made rigid for structural stability, then it maintains its shape, but it cannot adapt to different users and positions
Solution Approach 1:
The lumbar support employs a dynamic adjustment mechanism where the support portion can be repositioned to multiple discrete locations on the frame and rotated about the longitudinal axis. This provides adaptability for different users and positions while maintaining structural stability through defined engagement positions rather than continuous flexibility
Solution Approach 2:
Different portions of the lumbar support have different properties: the frame provides rigid structural stability, while the support portion provides adjustable local adaptation. The bearing devices at different locations on the frame enable selective engagement to match different user requirements while maintaining overall structural integrity
3Ease of operation
If manual adjustment is simplified for ease of use, then the adjustment mechanism becomes less precise
Solution Approach 1:
The adjustment mechanism is segmented into discrete positions along the frame rather than requiring continuous precise adjustment. The support portion engages at predefined locations, providing sufficient precision for ergonomic support while enabling simple manual operation without complex adjustment mechanisms
Solution Approach 2:
The invention uses simple manual engagement mechanisms rather than complex precision adjustment systems. The support portion can be easily repositioned and reengaged at different locations, providing adequate precision for lumbar support without requiring expensive or complex adjustment mechanisms
Data Source
Figure 1~2
Figure 3a~3b
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AI summary
The lumbar support (1) has a frame (4) including a recess (5) provided with two opposite bearing devices (6), where the frame is connected to anchoring extensions (7) for releasable anchoring of a backrest. A supporting device (8) is rotatable relative to the frame about a longitudinal axis (9) by the bearing devices. The anchoring projections are formed for height adjustment of the lumbar support on the backrest. The supporting device and the recess are dimensioned such that the supporting device is arranged within the recess. An independent claim is also included for a method for adjusting a lumbar support for a backrest of a chair.