Door Weather Strip Coupling Structure for Corner Alignment Stability
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Solution Overview
Problem
Existing door weather strip designs suffer from misalignment issues due to insufficient fixation, leading to abrasion, damage, and inadequate sealing performance when the door is opened or closed.
Innovation Solution
A coupling structure with a die-molded part incorporating a tabular-shaped rigid member embedded with a single anchoring part and a protrusion, which fits into a hole on the door frame, and a thick part that makes elastic contact with the retainer, preventing misalignment and stabilizing the seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single clip is used to fix the die-molded part on the door, then the installation is simple, but misalignment occurs during door operation
Solution Approach 1:
The fixation function is segmented into two independent elements: the clip for basic attachment and the protrusion for alignment control. This segmentation allows each element to perform its specific function optimally without interfering with the other.
Solution Approach 2:
The protrusion acts as an intermediary alignment element between the die-molded part and the door. It mediates the positioning by providing a dedicated alignment interface that prevents misalignment during door operation.
2Device complexity
If the die-molded part is fixed only by the clip, then the structure is simple, but rotation and misalignment occur during door opening/closing
Solution Approach 1:
The fixation system is divided into two functional segments: the clip handles the basic attachment to the door, while the protrusion handles the alignment and rotation prevention. This segmentation maintains structural simplicity while achieving stable positioning.
Solution Approach 2:
The fixation mechanism combines two different structural elements (clip and protrusion) with complementary functions. The clip provides attachment while the protrusion provides alignment, creating a composite fixation system that achieves both simplicity and stability.
3Ease of manufacture
If misalignment occurs, then the door weather strip can be easily installed, but abrasion and damage occur leading to insufficient sealing
Solution Approach 1:
The protrusion performs preliminary alignment action during installation, positioning the die-molded part correctly before the door is operated. This preliminary alignment prevents misalignment during door opening/closing, thereby preventing abrasion and maintaining sealing performance.
Solution Approach 2:
The protrusion provides preliminary anti-action against misalignment by establishing the correct position in advance. This prevents the harmful effect of misalignment-induced abrasion and sealing failure before it can occur during door operation.
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
Prevents misalignment and abrasion, maintains effective sealing performance by ensuring proper alignment of the door weather strip with the door, reducing noise and enhancing durability.
Implementation Method 1
a thick part 1FL3N, which is provided close to the second retainer 113CR and makes elastic contact with the second retainer 113CR
Data Source
AI summary
A door weather strip includes a first extrusion-molded part which couples to an upper side part of a frame of a door of an automobile, a second extrusion-molded part which couples to a vertical side part of the frame, and a die-molded part which connects the first and second extrusion-molded parts on a corner part. A second extended part extends toward a rear part from the die-molded part and has a rigid member embedded. A body of the rigid member has a single anchoring part which is fit in a hole formed on the vertical side part of a frame and a protrusion provided below the anchoring part. The protrusion is flush with the body and extends toward a front part of the automobile body. The protrusion is capable of abutting with an outer part of a second retainer of the door.