Conveyance Seat Lateral Support Interface Stretching
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Solution Overview
Problem
Conveyance seats with lateral support portions often have issues with the appearance quality due to inadequate stretching of the surface cover interfaces, which affects the overall aesthetic and structural integrity of the lateral support portion.
Innovation Solution
The conveyance seat design includes a base member with a slit hole and a strip-shaped extending portion that is pulled through the slit hole to stretch the interface between surface cover pieces, providing a better appearance and efficient attachment, while minimizing the reduction in base member strength and promoting stability of the extending portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the surface cover is formed by interfacing multiple surface cover pieces, then the appearance quality is improved, but the interface stretching is inadequate which deteriorates the overall appearance
Solution Approach 1:
The extending portion is pre-formed and attached to the interface between surface cover pieces before final assembly. This preliminary action enables controlled stretching of the interface when the extending portion is pulled through the slit hole, ensuring adequate stretching is achieved during the assembly process rather than requiring complex post-processing.
Solution Approach 2:
The extending portion acts as an intermediary element that connects the interface between surface cover pieces to the base member. By pulling this intermediary element through the slit hole, the interface is stretched indirectly and controllably, resolving the contradiction between maintaining appearance quality and achieving adequate interface stretching.
2Manufacturing precision
If the extending portion is pulled through the slit hole in the base member, then the interface stretching is improved, but the strength of the base member is reduced
Solution Approach 1:
The slit hole is positioned at a specific location in the base member where it causes minimal impact on overall structural strength. The extending portion is pulled through this strategically located slit hole, achieving interface stretching while the local nature of the modification preserves the global strength characteristics of the base member.
3Manufacturing precision
If the strip-shaped body is pulled hanging on an outer edge portion of the base member, then the interface stretching is achieved, but the extending portion length becomes excessive
Solution Approach 1:
The slit hole serves as an intermediary structure that enables the extending portion to be pulled through a compact path within or near the base member. This eliminates the need for the extending portion to hang externally from the outer edge, significantly reducing the required length while maintaining the interface stretching function.
Data Source
AI summary
Provided is a conveyance seat including a lateral support portion that provides good appearance. A lateral support portion of a seat back includes a base member that defines an outline of the lateral support portion and a surface cover arranged to cover the base member to form an outer surface of the lateral support portion. The surface cover includes multiple surface cover pieces interfaced with each other to form the surface cover and a strip-shaped body that extends out of the interface between the surface cover pieces in a reverse side portion of the surface cover. In a state where the surface cover covers the base member, the strip-shaped body is pulled toward a side of the base member opposite to that on which the interface is positioned with respect to the base member.