Waterproof Power Plug With Sliding Fuse Cover
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Solution Overview
Problem
Outdoor string lights are prone to water infiltration due to poor sealing at the joint between the cover plate and plug housing, leading to safety hazards and reduced service life in rainy or humid environments.
Innovation Solution
A waterproof power plug design featuring a mounting frame with a sliding fuse cover and a waterproof housing, including a first and second conductive terminal, a fuse, and a waterproof cover, which provides multiple layers of protection against water ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover plate is provided at the opening of the fuse mounting slot to prevent water penetration, then the waterproof performance is improved, but a gap forms at the joint position between the cover plate and plug housing causing poor sealing
Solution Approach 1:
The plug is divided into separate functional modules: the plug housing, the mounting frame with fuse compartment, and the waterproof cover. This segmentation allows each part to be optimized independently - the mounting frame provides structural support while the waterproof cover specifically addresses sealing requirements, resolving the contradiction between waterproof performance and structural simplicity.
Solution Approach 2:
The mounting frame is nested within the plug housing, and the waterproof cover is nested on the mounting frame. This nested structure creates multiple layers of protection against water ingress while maintaining a compact overall design. The fuse compartment is further nested within the mounting frame, providing progressive sealing barriers without requiring complex external sealing mechanisms.
2Ease of operation
If the fuse is exposed in the mounting groove for easy access, then the ease of operation is improved, but water can infiltrate the fuse mounting slot affecting service life and safety
Solution Approach 1:
The waterproof cover is designed to be movable rather than fixed, allowing it to be opened when fuse replacement is needed and closed during normal operation to prevent water ingress. This dynamic design enables the system to switch between two states: operational sealing mode and maintenance access mode, resolving the contradiction between waterproof performance and ease of fuse replacement.
Solution Approach 2:
The waterproof cover acts as an intermediary element between the external environment and the fuse compartment. It provides a controlled interface that allows fuse access when opened but maintains waterproof sealing when closed, mediating between the conflicting requirements of accessibility and protection.
3Ease of repair
If a traditional plug structure is used with replaceable fuse, then the ease of repair is improved, but the plug is vulnerable to water infiltration in outdoor environments
Solution Approach 1:
The waterproof cover and sealing structures are applied specifically to the fuse compartment area where water infiltration risk is highest, rather than making the entire plug structure complex. This localized approach provides targeted protection against water infiltration while maintaining the simple replaceable fuse design, resolving the contradiction between ease of repair and resistance to harmful environmental factors.
Data Source
AI summary
A waterproof power plug includes a mounting frame, first and second conductive terminals, a fuse, and a fuse cover which are mounted inside the mounting frame. The fuse is electrically connected to the second conductive terminal. The mounting frame is provided with a mounting groove for exposing the fuse, and the fuse cover is mounted in the mounting groove to cover or expose the fuse. The power plug further includes a housing opened with a window for slidably operating the fuse cover, and a waterproof cover is mounted in the window. Therefore, the fuse cover is arranged on the mounting groove and the waterproof cover is further covered on the fuse cover, which provides multiple waterproof protections. The power plug has a good sealing performance and waterproof performance, which also helps to improve the overall waterproof performance and work safety of the string light with the power plug.