Door Sash Inner Reinforcement Attachment via Segmented Mirror Bracket
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Solution Overview
Problem
Conventional door sash structures with belt line reinforcements extending across the lower sash result in increased size, which can lead to deformation and interference issues.
Innovation Solution
A door sash structure with an inner reinforcement positioned more inwardly than the door glass, featuring a mirror attachment portion and an inner reinforcement attachment portion that allows the door mirror to be attached without elongating the reinforcement beyond the sash, thereby preventing size increase and enhancing stiffness and attachment ease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the belt line reinforcement extends to cross the lower sash, then the attachment position is improved, but the size of the reinforcement increases
Solution Approach 1:
The attachment member is divided into distinct functional portions: a mirror attachment portion for attaching the door mirror and an inner reinforcement attachment portion for attaching the inner reinforcement. This segmentation allows the inner reinforcement to be attached without extending beyond the sash, preventing size increase while maintaining proper attachment positioning
Solution Approach 2:
The attachment member acts as an intermediary component between the inner reinforcement and the sash structure. It provides a dedicated inner reinforcement attachment portion that enables secure attachment of the inner reinforcement without requiring the reinforcement itself to extend beyond the sash, thus resolving the contradiction between attachment reliability and size control
2Adaptability or versatility
If the inner reinforcement is extended to the front side beyond the sash, then the attachment flexibility is improved, but the interference with door glass increases
Solution Approach 1:
The attachment member provides localized attachment functionality at specific positions: the inner reinforcement attachment portion is positioned to attach the inner reinforcement without extending beyond the sash front side, while the mirror attachment portion handles mirror attachment. This local quality approach ensures attachment flexibility is achieved only where needed, preventing interference with the door glass in other areas
3Strength
If the mirror attachment portion and door inner panel are attached while inner reinforcement covers the area, then the attachment ease is reduced, but the structural coverage is improved
Solution Approach 1:
The attachment member is segmented into distinct portions with the inner reinforcement attachment portion positioned to attach the inner reinforcement separately from the mirror attachment portion. This segmentation creates clear spatial separation between attachment zones, allowing the mirror attachment portion and door inner panel to be attached without interference from the inner reinforcement, thereby maintaining ease of manufacture while preserving structural coverage
Data Source
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AI summary
A door sash structure according to an embodiment includes: a sash that is configured to guide a front end edge of a door glass of a vehicle for ascending and descending of the door glass, an inner reinforcement that extends along a front-rear direction of the vehicle at a more inner position of the vehicle than the door glass, and an attachment member that is fixed on a side adjacent to the inside of the vehicle of the sash, and includes a mirror attachment portion and an inner reinforcement attachment portion. The mirror attachment portion is configured to allow a door mirror to be attached thereto in front of the sash in the front-rear direction. The inner reinforcement attachment portion extends from the door mirror attachment portion and allows the inner reinforcement to be fixed thereto in the rear of the sash in the front-rear direction.