Vehicle Door Sealing Structure for Lock Splash Prevention
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Solution Overview
Problem
Existing vehicle door sealing members fail to effectively prevent water from splashing onto the locked portion of a door when water enters the gap between the door and the vehicle body, due to the design of the sealing member's hollow portion and core removing hole, which allows water to unintentionally flow out and reach the locked portion, potentially causing freezing or rusting issues.
Innovation Solution
A vehicle door sealing member with a vertical side sealing portion that includes a water inlet and a drain port, featuring a die-molded portion with a core removing hole on the cabin outer side and a guide portion on the inner surface to direct water away from the core removing hole, reducing the likelihood of water splashing onto the locked portion. Additionally, an upper side sealing portion with elastic lips and a water guide groove helps to distribute water rearward and reduce the reaction force during door closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a core removing hole is formed in the die-molded portion for molding the hollow sealing portion, then the molding process becomes feasible, but water unintentionally flows out from the core removing hole and splashes onto the locked portion
Solution Approach 1:
A water guide portion is introduced as an intermediary structure between the hollow portion and the core removing hole. This water guide portion directs water flow away from the core removing hole, preventing water from unintentionally flowing out and splashing onto the locked portion, while allowing the core removing hole to remain for molding purposes
Solution Approach 2:
The inner surface of the die-molded portion is given different local qualities: a smooth water guide portion that directs water flow, and a core removing hole for molding. This local differentiation allows water to be guided away from the core removing hole while maintaining the feasibility of the molding process
2Object-affected harmful factors
If the sealing member is designed to guide water below the locked portion, then water splash onto the locked portion is reduced, but the structure becomes more complex requiring both die-molded and extrusion-molded portions
Solution Approach 1:
The die-molded portion and extrusion-molded portion are merged into a single integrated sealing member structure. The die-molded portion forms the hollow sealing portion with the water guide, while the extrusion-molded portion forms the lower sealing portion, creating a unified structure that guides water below the locked portion
Data Source
AI summary
To reduce splash of water that has entered a gap between an upper end of a door and a vehicle body onto a locked portion. A part of a vertical side sealing portion 4 from a part including a water inlet 71 to at least a part above a hollow portion R3 is a die-molded portion. In the die-molded portion, a core removing hole 79 for removing a core used in molding is open at a cabin outer side relative to an attachment plate 80. A guide portion 90 for guiding water that has entered from the water inlet 71 to a cabin inner side relative to the core removing hole 79 is provided above the core removing hole 79 on the inner surface of the hollow portion R3.