Junction Box Safety Mechanism for Prefabricated Electrical Conduits
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Solution Overview
Problem
Junction boxes for electrical installations with prefabricated conduits pose safety risks during installation, maintenance, and replacement due to immediate electrical connection, leading to potential electrocution hazards for operators.
Innovation Solution
A junction box design featuring a door that must be closed to establish electrical connection with conductor bars, utilizing a safety mechanism that ensures connection only upon door closure, and a mounting system with movable arms that secure the box to the conduit, preventing accidental access to live components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the junction box is immediately electrically connected to the conductor bars upon installation, then the electrical connection is established quickly and efficiently, but the operator risks electrocution during installation, maintenance, and replacement operations
Solution Approach 1:
The junction box is divided into two main parts: a stationary body that remains connected to the conductor bars, and a movable door that can be opened or closed. The electrical connection is segmented so that it is only established when the door is closed and latched, allowing the operator to work on the open box without electrocution risk while maintaining quick connection when needed
Solution Approach 2:
The operator can prepare and position the junction box with the door open before approaching the conductor bars. The box is pre-positioned in the correct location, and the door is kept open during installation of internal components. Only when the box is ready and the operator needs to leave does the door get closed to establish electrical connection
2Ease of operation
If the junction box maintains continuous electrical connection for easy access to power, then current can be drawn at any time, but the operator cannot safely perform maintenance or replacement tasks on the box components
Solution Approach 1:
The door of the junction box is made movable between open and closed positions, dynamically changing the electrical connection state. When open, the connection is broken allowing safe maintenance; when closed and latched, the connection is established allowing current draw. This dynamic mechanism resolves the contradiction between continuous access and maintenance safety
3Ease of manufacture
If the junction box is designed with simple mounting structure, then the box is easy to manufacture and install, but the box may not provide sufficient protection against unauthorized or accidental access to conductor bars
Solution Approach 1:
A latch mechanism acts as an intermediary between the door and the box body. This simple mechanical component provides reliable protection by requiring deliberate action to open the door, preventing accidental or unauthorized access while maintaining ease of manufacture. The latch is a straightforward mechanical element that can be easily integrated into the mounting structure
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
Enhances safety by ensuring electrical connection occurs only when the door is closed, preventing electrocution during installation and allowing safe maintenance by disconnecting power when accessing the box, while also preventing unauthorized access to conductor bars.
Implementation Method 1
said moving means comprises at least one movable arm, said movable arm is configured to rotate relative to said fixed arm in opposition contrast to a hinge with an elastic element, such as a spring
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a box (1), suitable for being used as a junction box for electrical installations of the type with prefabricated electrical conduits including one or more conductor bars (2), comprising a plurality of walls (3, 3a, 3b, 3c, 3d, 3e, 3f) assembled together in such a way as to define an internal volume of the box (1). The box comprises a mounting means (27) configured to be operatively interposed between said box (1) and a component (28) associated with said prefabricated electrical conduit. The mounting means (27) comprise a positioning means (29), for positioning said box (1) relative to said prefabricated electrical conduit, disposed on said box (1) in such a way as to project at least partially from one of said walls (3, 3a, 3b, 3c, 3d, 3e, 3f). The mounting means (27) further comprise a moving means (30), for moving said component (28) associated with said prefabricated electrical conduit, disposed on said box (1) in such a way as to project at least partially from the same wall that said positioning means (29) project from.