Watertight Junction Box with Elastic Sealing Ring
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Solution Overview
Problem
Existing junction boxes fail to prevent water permeation when used outdoors, leading to oxidation of conductive metal components and reduced service life.
Innovation Solution
A watertight junction box design that uses silicon rubber to wrap around the connection area between copper contacts and power wires, providing a watertight seal and protecting against oxidation, with a mechanism that allows repeated use without compromising sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional junction box is used for outdoor wire connection, then the connection function is achieved, but water permeation occurs causing oxidation of metal components and reduced service life
Solution Approach 1:
The patent applies a flexible waterproof sealing ring made of elastic material that wraps around the wire insertion area. This flexible film structure creates a watertight seal between the junction box body and the wire, preventing water permeation while accommodating wire insertion and removal operations.
Solution Approach 2:
The patent introduces a waterproof sealing ring as an intermediary element between the junction box body and the wire connection area. This sealing ring acts as a mediator that blocks water pathways while allowing electrical connections to be made, thus protecting the metal components from oxidation.
2Object-affected harmful factors
If the junction box structure is made complex to achieve watertight sealing, then water permeation is prevented, but the device complexity increases
Solution Approach 1:
The patent divides the waterproofing function into a separate, modular sealing ring component rather than integrating it into the main junction box structure. This segmentation allows the sealing function to be added without fundamentally redesigning the entire device, maintaining simplicity while achieving watertight sealing.
Solution Approach 2:
By introducing the waterproof sealing ring as an intermediary component, the patent achieves complex sealing functionality without making the overall device structure complex. The sealing ring handles the complicated waterproofing task independently, allowing the main junction box body to remain simple in design.
3Adaptability or versatility
If the junction box is designed for repeated use, then versatility is improved, but maintaining watertight sealing function after multiple operations becomes difficult
Solution Approach 1:
The patent employs a dynamic, elastic waterproof sealing ring that can deform and recover. The elasticity allows the sealing ring to adapt to wire insertion and removal operations, maintaining the watertight seal through repeated use cycles without permanent deformation or loss of sealing effectiveness.
Solution Approach 2:
The patent utilizes the elastic properties of the sealing ring material, which changes its physical parameters (shape, volume) during wire insertion and removal. This parameter change capability allows the sealing ring to accommodate repeated operations while maintaining consistent sealing performance, ensuring long-term reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design ensures long-term conductive stability and prevents water ingress, extending the service life of the junction box while maintaining watertight sealing functionality.
Implementation Method 1
a piece of silicon rubber to wrap about the connection area between the copper contacts and the installed power wire
Implementation Method 2
protecting the copper contacts against oxidation and assuring a long service life and conductive stability
Data Source
AI summary
A watertight junction box includes a box body, a lower floating plate, an upper floating plate, a lock cap, a modular cable inserted into the box body and kept in contact with sharp copper contacts, a holding down plate for holding down an external power wire on the upper floating plate to cause electric contact between the external power wire and the sharp copper contacts, and a predetermined amount of silicon rubber filled in between the lower and upper floating plate that is deformed to wrap about the connection area between the sharp copper contacts and the external power wire when the lock cap is tightly fastened to the box body to force down the holding down plate.