Vehicular Door Sealing via Continuous Compound Application
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Solution Overview
Problem
Existing vehicular door structures face challenges in sealing the work aperture due to discontinuous sealing compound application and increased complexity from using hard materials, leading to gaps and reduced seal performance.
Innovation Solution
A vehicular door structure with a belt-shaped sealing compound application section and an attachment member that holds the wire-shaped member, allowing continuous application of sealing compound across the sealing compound application section and attachment member, ensuring a flush surface for improved seal performance and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a concave section is formed to allow wire-shaped member insertion, then the wire-shaped member can be positioned, but the sealing compound application becomes discontinuous and gaps form between seal beads
Solution Approach 1:
The attachment member is embedded within the concave section of the door inner panel, with the wire-shaped member nested through the attachment member. This nested structure allows the wire-shaped member to be securely positioned while maintaining continuous sealing compound application around the entire perimeter including the circumferential edge section.
2Ease of manufacture
If a soft member is used to bury the discontinuous sealing compound, then the gap can be filled, but the sealing reliability decreases because the soft member easily varies its shape
Solution Approach 1:
The invention eliminates the need for separate soft members by applying sealing compound directly to form a continuous seal. The sealing compound itself serves as the sealing element, eliminating the need for additional soft member components that would require installation and maintenance.
3Reliability
If hard materials like closing panels and link covers are used to seal the work aperture, then the sealing structure is formed, but the number of seal places increases and the structure becomes complicated
Solution Approach 1:
The invention merges the sealing function with the door inner panel itself by forming a recessed section and applying sealing compound directly to the panel surface. This eliminates the need for separate closing panels and link covers, reducing the number of components and seal places while maintaining reliable sealing.
4Ease of operation
If the sealing compound is applied discontinuously at the concave section, then the wire-shaped member can be inserted, but the work aperture cannot be properly sealed
Solution Approach 1:
The attachment member is pre-installed in the concave section of the door inner panel before sealing. This preliminary action provides a fixed structure that guides the wire-shaped member during insertion while allowing continuous sealing compound application to proceed without interruption, ensuring both ease of operation and reliable sealing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables easy closure and sealing of the work aperture with improved acoustic insulation and waterproofing by preventing interruptions in the sealing compound application and reducing the number of seal places, thus enhancing the overall seal performance.
Implementation Method 1
a sealing compound configured to tightly adhere an outer circumferential edge section of the sealing sheet to the door inner panel side is continuously applied across the sealing compound application section and the attachment member
Data Source
AI summary
A vehicular door structure includes a door inner panel in which a work aperture is formed, a sealing sheet configured to close the work aperture, a sealing compound application section formed at the door inner panel, and an attachment member configured to hold a wire-shaped member and attach the wire-shaped member to the door inner panel, wherein the attachment member is disposed in the middle of an extension direction of the sealing compound application section, and a sealing compound configured to adhere the sealing sheet to the door inner panel side is continuously applied across the sealing compound application section and the attachment member.