Vehicle Seat Backrest Assembly With Temporary Gravity Positioning
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Solution Overview
Problem
Existing vehicle seat assembly methods require manual positioning and fixing of multiple components, making it impractical for a single person to assemble the backrest and sitting part with fastening means like screws or spot welds.
Innovation Solution
A vehicle seat design where the backrest is temporarily connected to the sitting part using a backrest adjusting element with integrated means such as indentations or latching lugs, allowing for gravity-assisted positioning and subsequent secure fastening with screws or welding, enabling assembly by one person.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If manual positioning and fixing of backrest and sitting part with fastening means is used, then connection strength is improved, but assembly complexity and labor requirement increase
Solution Approach 1:
The backrest is preliminarily positioned and temporarily fixed to the sitting part before the actual fastening operation. The temporary fixing means holds the backrest in the correct assembly position, allowing subsequent fastening means to be applied without requiring manual holding of multiple components simultaneously.
Solution Approach 2:
The connection process is segmented into two distinct stages: temporary fixing stage and permanent fastening stage. The temporary fixing means serves the temporary positioning function, while the fastening means provides the permanent connection, separating the positioning function from the fastening function.
2Manufacturing precision
If multiple components are held simultaneously in position during assembly, then positioning precision is improved, but ease of operation deteriorates
Solution Approach 1:
The temporary fixing means automatically secures the backrest in the correct position relative to the sitting part without requiring manual holding. The system serves itself by providing self-positioning and self-holding capabilities through the temporary fixing mechanism, eliminating the need for multiple hands to hold components.
Solution Approach 2:
The temporary fixing means acts as an intermediary between the backrest and sitting part during assembly. It provides the necessary positioning and holding function temporarily, allowing the actual fastening operation to proceed without manual intervention for holding components.
3Ease of manufacture
If temporary connection means are incorporated in the backrest adjusting element, then ease of manufacture is improved, but device complexity increases
Solution Approach 1:
The temporary fixing means is merged with the backrest adjusting element, combining multiple functions (adjustment and temporary fixing) into a single integrated component. This reduces the total number of separate parts and simplifies the assembly process, as the adjusting element serves dual purposes.
Solution Approach 2:
The backrest adjusting element is designed with multi-functionality, serving both as the adjustment mechanism and as the carrier for the temporary fixing means. This universal design reduces the number of separate components needed and simplifies the overall assembly process.
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
Facilitates easy and cost-effective assembly of vehicle seats by isolating the positioning of the backrest from the attachment of fastening means, allowing for efficient and secure connection without manual holding of multiple components.
Implementation Method 1
the backrest may be positioned on the sitting part, at least approximately following the direction of gravity, until reaching an end stop
Data Source
AI summary
A vehicle seat includes a backrest connected to a sitting part by a backrest adjustment element. The adjustment element has a part that is connected to the backrest or to the sitting part. At least one means is formed, incorporated, shaped and/or arranged in the backrest, in the part and/or the seat part for securing the position of the part relative to the backrest and/or to the sitting part in at least one direction.