Waterproof Box Cover Blind Passages High-Pressure Water Ingress
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Solution Overview
Problem
Packing-less waterproof boxes are inadequate in preventing water ingress during high-pressure washing, and their operation is cumbersome, requiring two-handed use and additional space due to complex locking mechanisms.
Innovation Solution
The design incorporates blind passages on the mating surfaces of the waterproof structure portions between the box main body and cover, which act as buffers to reduce water pressure, and allows for single-handed operation by providing rotation support points and a simplified locking mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a packing-less waterproof structure is used to reduce component number and cost, then manufacturing simplicity improves, but waterproofing performance deteriorates under high-pressure water jets
Solution Approach 1:
The waterproof structure is segmented into multiple functional zones: the waterproof protrusion and recess form a basic overlapping joint, while blind passages are segmented into multiple sections along the water flow path. Each segment serves a specific function - the protrusion-recess pair provides structural waterproofing, while the blind passages provide pressure reduction stages, collectively achieving high-pressure waterproofing without packing materials.
Solution Approach 2:
The blind passages act as intermediary chambers between the external high-pressure water environment and the internal box cavity. These intermediate spaces buffer and reduce water pressure progressively, preventing direct high-pressure water intrusion into the box while maintaining a simple overlapping waterproof structure without complex packing materials.
2Reliability
If a complex locking mechanism with multiple locks is used to secure the cover, then locking reliability improves, but ease of operation deteriorates requiring two-handed use
Solution Approach 1:
The locking mechanism merges multiple functions into a single integrated lever: one end engages with the waterproof protrusion for positioning and initial locking, while the other end engages with the lock groove for secure locking. This unified lever structure allows single-handed operation while maintaining reliable multi-point locking through coordinated engagement of both ends.
Solution Approach 2:
The lever serves multiple functions simultaneously: it acts as a positioning element against the waterproof protrusion, a locking element in the lock groove, and an operational handle for user interaction. This multi-functionality enables a single component to provide both reliable securing and ease of operation without requiring separate mechanisms.
3Reliability
If multiple locks are distributed at separated positions to improve waterproofing, then waterproofing performance improves, but device complexity increases
Solution Approach 1:
Multiple locking functions at different positions are merged into a single lever structure. The lever's extended design allows one end to engage the waterproof protrusion at one location while the other end engages the lock groove at a separated position, achieving multi-point secure waterproofing through one integrated component rather than multiple separate locks.
Solution Approach 2:
The single lever performs multiple waterproofing and locking functions across different positions: it provides positioning at the waterproof protrusion, secure locking at the lock groove, and structural support across the separated positions. This universal component reduces device complexity by eliminating the need for multiple independent locking mechanisms.
Data Source
AI summary
When cleaning water hits a lower wall 33h of a first waterproof portion 33 of an upper cover 15, and the water is thrown up to the upper cover 15, a tapered outer wall 30b of the first waterproof portion 30 and a tapered inner wall 33g of the first waterproof portion 33 come into contact with each other, and are engaged with each other to close an entrance side of a tiny passage 27. Even if the water enters, the water enters a blind passage 33b to reduce the force of the water. The water of which force is reduced falls down. It is effective for improving waterproof performance to reduce the force of the water by the blind passage 33b.