Vehicle Casing Liquid Discharge Structure with Blocking Wall
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Solution Overview
Problem
Conventional liquid discharge structures in vehicle casings, such as electrical junction boxes, face limitations in discharge capacity and external liquid suppression, as the engaging protrusions can narrow the discharge path and allow external liquid entry.
Innovation Solution
A liquid discharge structure featuring a plate-shaped bottom wall with a discharge opening and a blocking wall positioned outside, overlapping with the discharge opening, along with a fixing mechanism that is attachable and detachable, ensuring a wider discharge path and effective suppression of external liquid entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a clamp with an engaging protrusion is used to block liquid at the discharge opening, then liquid suppression from outside is improved, but the discharge path is narrowed and discharge capacity deteriorates
Solution Approach 1:
The liquid discharge structure is divided into separate functional components: a blocking wall for suppressing external liquid and a discharge opening for internal liquid drainage. The blocking wall is positioned to overlap the discharge opening in plan view but remains separated by a gap, allowing liquid to flow underneath while blocking external entry. This segmentation resolves the contradiction by assigning distinct roles to each component rather than using a single structure that compromises both functions.
Solution Approach 2:
The blocking wall is positioned in three-dimensional space such that it overlaps the discharge opening when viewed from above (plan view) but is elevated above the bottom wall by a specific gap distance. This dimensional arrangement allows the blocking wall to suppress external liquid from above while liquid from inside the casing can flow horizontally underneath it through the gap, maintaining discharge capacity without compromising liquid suppression.
2Object-affected harmful factors
If a blocking wall is positioned to overlap the discharge opening, then liquid suppression from outside is improved, but the discharge path may be blocked
Solution Approach 1:
A gap is introduced as an intermediary space between the blocking wall and the bottom wall at the discharge opening. This gap serves as a mediator that allows liquid from inside the casing to pass underneath the blocking wall while preventing external liquid from entering. The gap distance is specifically designed to be sufficient for liquid flow but insufficient for external liquid to bridge across and enter the casing.
3Reliability
If the fixing mechanism is disposed over the discharge opening, then the blocking wall can be securely fixed, but the discharge path is narrowed
Solution Approach 1:
The fixing mechanism is extracted from the discharge opening area and repositioned to a different location on the bottom wall. The fixing mechanism includes a fixing protrusion that engages with a fixing recess, both positioned away from the discharge opening. This extraction allows the discharge opening to remain fully open and unobstructed while the blocking wall is still securely attached to the bottom wall through the separately positioned fixing mechanism.
Data Source
AI summary
An objective of the present invention is to improve the discharge capacity for liquid collected within a casing while suppressing liquid entering a discharge opening from the outside. A liquid discharge structure includes a plate-shaped bottom wall with a discharge opening for liquid, the liquid being collected inside a casing 1 which is configured to be installed in a vehicle, a blocking wall outside the bottom wall, wherein the blocking wall is overlapped with the discharge opening in a plan view on the bottom wall and opposed to the bottom wall with a gap between the blocking wall and the bottom wall, and a fixing mechanism which is disposed not to be overlapped with the discharge opening in the plan view, wherein the fixing mechanism is configured to fix the blocking wall relative to the bottom wall in an attachable and detachable manner.