Pivotable Vehicle Seat Backrest for Turning Support
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Solution Overview
Problem
Conventional vehicle seats lack adequate support for drivers in commercial vehicles when they need to turn and monitor rear or side components, leading to reduced seating comfort and increased fatigue.
Innovation Solution
A vehicle seat with a pivotable backrest comprising a middle backrest element and two lower and two upper backrest side elements, mechanically coupled with joint devices, allowing for ergonomic adaptation during turning movements and isolating transverse accelerations, featuring a shell-like design for lateral support and adjustable components for spinal support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional fixed backrest is used, then the structure is simple and stable, but the occupant lacks adequate support during turning movements leading to increased fatigue
Solution Approach 1:
The backrest is divided into multiple independent elements: a central backrest element, two lower backrest side elements, and two upper backrest side elements. Each element can pivot independently on the backrest base element, allowing the backrest to adapt to turning movements while maintaining structural manageability through modular segmentation.
Solution Approach 2:
The backrest elements are designed with pivotable connections to the backrest base element, transforming the static fixed backrest into a dynamic structure. The lower backrest side elements and upper backrest side elements can rotate relative to the base, enabling the backrest to dynamically adapt to the occupant's turning movements and provide continuous support.
2Ease of operation
If the backrest is made rigid for stability, then structural stability is maintained, but comfort during lateral movements is reduced
Solution Approach 1:
The backrest employs pivotable connections between the side elements and the base element, allowing controlled movement while maintaining overall structural integrity. The dynamic capability enables the backrest to move with the occupant during turning, improving comfort, while the rigid connections maintain stability in the normal seating position.
Solution Approach 2:
The backrest structure changes its geometric parameters (angles between elements) in response to occupant movement. The pivotable joints allow the backrest to adjust its configuration dynamically, changing from a stable fixed structure to an adaptive moving structure that maintains support during turning movements.
3Adaptability or versatility
If a multi-element pivotable backrest is implemented, then ergonomic support during turning is improved, but the device complexity increases
Solution Approach 1:
The backrest is segmented into five distinct elements (one central and four side elements) that can pivot independently. This segmentation allows each element to contribute to ergonomic support during turning movements while keeping the overall design manageable through modular construction and standardized pivot connections.
Data Source
AI summary
The invention relates to a vehicle seat having a backrest which comprises a backrest part and a backrest base element, the backrest part comprising a middle backrest element which is arranged pivotably on the backrest base element, wherein the backrest part comprises two lower backrest side elements and two upper backrest side elements, which are each mechanically coupled to the middle backrest element, wherein the two lower backrest side elements are arranged pivotably on the backrest base element, wherein at least one joint device is provided in each case between a lower backrest side element and an upper backrest side element, wherein a lower backrest side element and an upper backrest side element are each arranged at an angle αL, αR to one another, wherein pivoting of the middle backrest element causes a change in the angle αL, αR.