Concealed Torsion Spring in Vehicle Backrest
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Solution Overview
Problem
Existing vehicle seat designs with adjustable backrests often require visible and exposed spring mechanisms for folding, which detract from the appearance and safety, as they can pose a risk of injury and create noise during operation.
Innovation Solution
A vehicle seat design incorporating a torsion spring completely within the backrest part, supported at one end on the backrest rear wall and the other end on an intermediate piece fixed to the frame, ensuring the spring is concealed and securely held, allowing for reliable and quiet operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring means is guided out of the padding and seat cover during connection to the bodywork, then the spring means can be supported on the bodywork structure, but the appearance of the vehicle seat is deteriorated and safety is reduced due to exposed springs
Solution Approach 1:
The spring means is nested completely within the backrest part structure, specifically arranged between the backrest rear wall and the intermediate piece. The backrest upholstery and backrest cover completely enclose the spring means, making it invisible and inaccessible to users while maintaining its mechanical function for assisting backrest folding movements.
Solution Approach 2:
An intermediate piece is introduced as a mediator component that is fastened to the bodywork structure and provides a support point for the spring means entirely within the backrest part. This intermediate piece acts as an intermediary between the spring means and the bodywork, eliminating the need to guide the spring outside the upholstery while maintaining structural support.
2Object-affected harmful factors
If the spring means is arranged completely within the backrest part, then safety and appearance are improved, but the spring means requires additional fastening mechanisms to the backrest rear wall
Solution Approach 1:
The intermediate piece serves multiple functions simultaneously: it is fastened to the bodywork structure to provide a fixed support point, it provides mounting points for both ends of the spring means, and it maintains the spring means entirely within the backrest part. This multi-functionality reduces the need for separate fastening mechanisms for each component.
3Ease of manufacture
If the spring means is exposed and visible, then installation and maintenance are easier, but the visual appearance and safety are compromised
Solution Approach 1:
The spring means is completely nested within the backrest part, enclosed by the backrest upholstery and backrest cover. This nesting arrangement makes the spring means invisible to users, eliminating aesthetic deterioration and injury risk while maintaining all mechanical functions within the confined space of the backrest structure.
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 enhances the safety and aesthetic appeal by hiding the spring mechanism, reducing the risk of injury and eliminating creaking or rattling noises during backrest movement, while maintaining operational reliability and ease of use.
Implementation Method 1
a spring means designed as a torsion spring is in each case arranged completely within the corresponding backrest part
Data Source
AI summary
The present invention relates to a vehicle seat having a seat part and having at least one backrest part which is pivotable about an axis of rotation relative to the seat part, and having a spring means which is effective between the seat part and the backrest part, wherein the backrest part comprises at least a backrest rear wall, backrest upholstery and a backrest cover. According to the invention, a spring means designed as a torsion spring is in each case arranged completely within the corresponding backrest part, is supported at the first end thereof on the backrest rear wall and acts at the second end thereof opposite the first end on an intermediate piece or on a stop of the intermediate piece, wherein the intermediate piece is arranged on the axis of rotation and is fastened to a bearing in a manner fixed relative to the frame.