Captive-Screw Junction Box Cover for Warp-Resistant Sealing
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Solution Overview
Problem
Junction boxes, especially those made of thermoplastics, are prone to warping due to environmental conditions, leading to exposure of wiring and potential electrical hazards, and the loose elements during installation are often lost, causing delays and waste in the installation process.
Innovation Solution
A junction box assembly design featuring a cover with captive screws and a slot for temporary storage, where two screws are removed for attachment and the others remain in place, ensuring secure installation and minimizing loss, with a gasket groove for a tight seal and airflow to prevent warping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If loose elements (covers, screws, gaskets) are used during junction box installation, then the installation process allows flexibility in assembly, but the loose elements may become lost during the time-consuming installation process, rendering the junction box useless and requiring replacement
Solution Approach 1:
The patent combines multiple previously separate components (cover, screws, gasket) into a single integrated assembly. The cover is pre-assembled with captive screws and a gasket, eliminating the need for separate loose elements that could be lost during installation. This merging maintains assembly flexibility while preventing loss of components.
2Ease of manufacture
If junction boxes are made of thermoplastics, then the material provides ease of manufacture and installation, but the junction boxes can warp over time due to environmental conditions, exposing wiring and creating electrical hazards
Solution Approach 1:
The patent incorporates a gasket into the cover assembly before final installation. This preliminary action of pre-assembling the gasket with the cover ensures proper sealing is established from the beginning, preventing environmental factors from causing warping and maintaining the structural integrity and electrical safety of the junction box over time.
Data Source
AI summary
A junction box assembly includes a cover and a junction box. The cover has a first captive screw in a first screw hole and a second captive screw in a second screw hole. The junction box has a slot to temporarily store the cover.