Vehicle Door Sash Structure with Separated Reinforcement Attachment

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional vehicle door sash structures experience a 'sucked-out phenomenon' at high speeds due to negative pressure, where the outer panel and reinforcements are pulled out, leading to increased load on the sash, potentially causing deformation.

Innovation Solution

A door sash structure with a separated outer reinforcement attachment member that moves relative to the sash, reducing the load by preventing direct contact and incorporating a design with high stiffness to prevent collapse, and improved sealing properties around the door mirror attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the outer reinforcement is directly attached to the sash, then the structural strength is improved, but the load on the sash increases during the sucked-out phenomenon

Engineering Contradiction:

Improvestructural strengthVSAvoidload on sash

Core Design Contradiction:

StrengthVSForce

Solution Approach 1:

The outer reinforcement attachment member is separated from the sash, creating an independent component that can move relative to the sash. This segmentation allows the attachment member to absorb suction forces through relative movement, preventing direct transmission of high loads to the sash while maintaining structural strength through the attachment member's own reinforcement structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The outer reinforcement attachment member is designed to move relative to the sash during the sucked-out phenomenon. This dynamic capability allows the attachment member to deform and absorb suction forces, reducing the peak load transmitted to the sash while maintaining structural integrity through controlled movement rather than rigid connection.

Inventive Principle:

Principle #15Dynamics

2Force

If the outer reinforcement attachment member is separated from the sash, then the load on the sash is reduced, but the structural stability may be compromised

Engineering Contradiction:

Improveload on sashVSAvoidstructural stability

Core Design Contradiction:

ForceVSStability of the object's composition

Solution Approach 1:

The attachment member is segmented into distinct components (outer reinforcement attachment member separate from sash) that can move independently. This segmentation maintains stability by allowing each component to perform its specific function - the attachment member absorbs suction forces while the sash maintains its primary structural role.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The attachment member's position parameter is changed from fixed to movable relative to the sash. This parameter change allows the system to adapt to suction forces by adjusting the relative position, maintaining structural stability through controlled movement rather than rigid constraint that would transmit harmful loads.

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If the mirror attachment member is fixed to the sash, then the mounting stability is improved, but the sealing properties around the door mirror are insufficient

Engineering Contradiction:

Improvemounting stabilityVSAvoidsealing properties

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

A sealing member is introduced as an intermediary element between the mirror attachment member and the door panel. This sealing member fills gaps and prevents water infiltration, improving sealing properties while allowing the mirror attachment member to remain stably fixed to the sash structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The sealing member functions as a flexible element that can deform to fill gaps between rigid components. This flexible sealing film maintains mounting stability while adapting to slight movements and manufacturing tolerances, ensuring reliable sealing around the door mirror attachment area.

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS11679650B2Door sash structure

Publication Date: 2023.06.20 AISIN CORP

AI summary

A door sash structure according to an embodiment includes a sash, a mirror attachment member, and an outer reinforcement attachment member. The sash is configured to guide a front end edge of a door glass of a vehicle while the door glass moves upward or downward. The mirror attachment member is configured to allow a door mirror to be attached thereto, and is fixed to the sash. The outer reinforcement attachment member is configured to allow at least one of a door outer panel and an outer reinforcement extending along the door glass on a side of the door glass adjacent to an outside of the vehicle to be attached thereto, and is fixed to an outer surface of the mirror attachment member that faces the outside of the vehicle, and separated from the sash.