Adjustable Vehicle Seat Backrest Width Mechanism
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Solution Overview
Problem
Existing vehicle seats lack adjustable backrests that provide optimal support for drivers of varying sizes, leading to decreased comfort and increased production complexity due to the need for multiple backrest widths, while safety and cost considerations are not adequately met by existing solutions that allow for width adjustments through upholstery modifications.
Innovation Solution
A vehicle seat design featuring adjustable backrest longitudinal supports and a backrest cross brace that allows for individual adjustment of the backrest width in the upper area, maintaining support in the pelvic area by keeping the lower area width unchanged, using mechanisms such as elongated cross braces, rotary spindles, lifting cylinders, or articulated connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the backrest width is adjusted by pulling out upholstery elements or supports along the entire height direction, then the backrest can accommodate different driver sizes, but the pelvic area support becomes insufficient and safety requirements are not met
Solution Approach 1:
The backrest is divided into an upper region and a lower region, with independent width adjustment capabilities for each. The upper region can be widened by pulling out upholstery elements or supports, while the lower region maintains its original width to ensure proper pelvic support and meet safety requirements.
Solution Approach 2:
Different regions of the backrest are given different functional properties: the upper region is designed to be adjustable in width to accommodate different driver sizes and provide comfort, while the lower region is kept fixed in width to ensure safety and proper pelvic support.
2Adaptability or versatility
If multiple backrest widths are produced to accommodate different drivers, then seating comfort is improved, but production complexity and costs increase
Solution Approach 1:
The backrest incorporates adjustable components such as upholstery elements or supports that can be pulled out or repositioned along the height direction, allowing the backrest width to be dynamically changed to suit different drivers without requiring multiple different backrest structures.
Solution Approach 2:
A single backrest structure is designed to perform multiple functions by incorporating adjustable elements that can be repositioned to create different width configurations, eliminating the need to produce multiple separate backrest types for different driver sizes.
3Ease of operation
If the backrest width is adjusted in the lower area to accommodate different drivers, then comfort is improved, but lateral support in the pelvic area is lost
Solution Approach 1:
The backrest is segmented into upper and lower regions with independent width adjustment capabilities, allowing the upper region to be widened for comfort while the lower region maintains its width to provide necessary lateral support in the pelvic area.
Solution Approach 2:
The lower region of the backrest is designed with fixed width characteristics to provide strong lateral support for the pelvic area, while the upper region is designed with adjustable width characteristics to accommodate different driver sizes and provide comfort.
Data Source
Figure 1~2
Figure 3~5
Figure 6A~6C
AI summary
The invention relates to a vehicle seat (1) comprising a seat part (2) and a backrest (3), wherein the backrest has at least one left-side longitudinal backrest support (5) extending in the direction of the backrest height and at least one right-side longitudinal backrest support (6) extending in the direction of the backrest height, wherein the backrest longitudinal supports are attached to the seat part and/or a seat part frame in a lower end region and have at least one upholstery element, wherein the distance between the backrest longitudinal supports can be changed in length by means of at least one elongated backrest crossbar (12) arranged in the upper region of the backrest.