Dual-Backrest Vehicle Seat Assembly With Stop-Notch Guidance
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Solution Overview
Problem
Existing vehicle seats designed for multiple users face challenges in maintaining the structural integrity and simplicity while allowing easy assembly and reducing bulk and mass, particularly in accommodating two backrests that need to be pivotably mounted and securely held in place.
Innovation Solution
A vehicle seat design featuring a guiding device with articulation and stop elements that allow for the second backrest to be assembled by translation along the transverse direction, using stop elements and notches to prevent collision with the vehicle chassis, and a combination of metallic and plastic components for the guiding device to simplify assembly and reduce weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second backrest is securely held in place relative to the guiding device, then structural integrity is improved, but device complexity increases due to multiple stop elements and articulation surfaces
Solution Approach 1:
The guiding device is segmented into distinct functional elements: articulation portions for rotation, stop elements for positioning, and notches for engagement. The second backrest is divided into flanges with corresponding bores. This segmentation allows each element to perform its specific function independently, ensuring reliable structural integrity while keeping the overall design manageable through functional decomposition.
Solution Approach 2:
The articulation portion of the guiding device is configured to pass through the first bore of the second backrest, creating a nested arrangement where the guiding device passes through the backrest structure. This nesting reduces the need for additional separate connection components, thereby reducing device complexity while maintaining secure holding through the interlocking articulation surfaces and stop elements.
2Ease of manufacture
If the second backrest is assembled by translation along the transverse direction, then ease of manufacture is improved, but the ability to prevent collision with vehicle chassis is worsened without stop elements
Solution Approach 1:
Stop elements are pre-positioned on the guiding device at specific locations along the transverse direction. The notches on the second backrest are designed to engage with these pre-positioned stop elements during the translation assembly process. This preliminary positioning ensures that when the backrest is assembled by simple translation, the stop elements automatically prevent collision with the vehicle chassis without requiring complex adjustment mechanisms.
3Weight of moving object
If metallic and plastic components are combined for the guiding device, then weight is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The guiding device combines metallic components (providing strength and rigidity for articulation surfaces and stop elements) with plastic components (reducing overall weight). The design incorporates features such as notches and engagement surfaces that are specifically designed to accommodate the different properties of metallic and plastic materials, ensuring that manufacturing precision requirements are met while achieving weight reduction through material composite usage.
Data Source
AI summary
A vehicle seat comprising a guiding device comprising a first articulation portion and a second articulation portion, the first articulation portion has a first articulation surface, the second articulation portion has a second articulation surface, a first stop element and a second stop element, a first backrest, a second backrest comprising a first flange and a second flange, the first flange has a first bore cooperating with the first articulation surface, the second flange has a second bore cooperating with the second articulation surface, the second bore has a circular portion and a notch, the notch of the second bore is configured to allow the passage of the second stop element through the notch.