Vehicle Seat Back Shell Layout for Automated Backrest Assembly
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Solution Overview
Problem
Existing methods for producing vehicle seat backs with padding on the rear part are difficult to automate due to precise placement and fixing challenges, especially when using a shell without padding, which lacks support functionality.
Innovation Solution
A vehicle seat back design featuring a backrest frame with headrest attachment rods and a backrest trim comprising a rear central shell with holes for guiding precise positioning, combined with elastic fitting for secure attachment of upholstery modules, allowing efficient automation in manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If padding is attached to the rear part of the backrest, then comfort and aesthetics are improved, but manufacturing complexity and automation difficulty increase
Solution Approach 1:
The backrest trim is divided into separate modules: a rear central shell without padding and front lateral upholstery modules with padding. This segmentation allows the rear shell to be easily positioned and fixed by automation using guide holes, while the front modules with padding can be handled separately, reducing overall assembly complexity.
Solution Approach 2:
The padding is extracted from the rear central shell, which only retains the shell structure for aesthetic purposes. This removes the complexity of positioning and fixing padding on the rear part, making automation feasible while maintaining the visual appearance of a fully padded backrest.
2Ease of operation
If a shell without padding is used on the rear part, then handling and positioning by automatons is improved, but aesthetic consistency and comfort perception may worsen
Solution Approach 1:
The backrest trim is segmented into a rear central shell and front lateral upholstery modules. The rear shell can be easily handled by automatons due to its simple shell structure with guide holes, while the front modules with padding maintain aesthetic consistency. The modules are subsequently assembled together to create a uniform appearance.
Solution Approach 2:
The rear central shell acts as an intermediary element that provides structural support and aesthetic function without requiring padding. It serves as a base to which the front lateral upholstery modules with padding are attached, ensuring both ease of automation and aesthetic uniformity in the final assembly.
3Manufacturing precision
If precise placement of padding is required, then comfort and aesthetics are improved, but manufacturing difficulty and time increase
Solution Approach 1:
The backrest trim is divided into modular units with padding pre-attached to the front lateral modules. This allows precise placement of padding to be achieved during the module manufacturing stage rather than during final assembly, enabling automated assembly at high speed without compromising placement precision.
Solution Approach 2:
The padding is pre-positioned and fixed on the front lateral upholstery modules before final assembly to the backrest frame. This preliminary action ensures precise placement is achieved during module production, allowing the final assembly to proceed quickly with automation while maintaining high precision requirements.
Data Source
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AI summary
A vehicle seat back (16) (10) includes a backrest frame (17), at least one headrest mounting rod (38), and a backrest trim (18). The backrest trim (18) includes at least one rear center shell (58), attached to a rear face (17B) of the backrest frame (17). The rear center shell (58) includes at least one hole (60) through which at least one headrest mounting rod (38) passes.