Junction Box Lid-Actuated Clamping for Faster Cable Termination
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Solution Overview
Problem
Conventional junction boxes, including push-fit types, are time-consuming to wire due to the complexity of connecting electrical cables, which hinders efficient installation and maintenance of electrical systems.
Innovation Solution
A modular electrical junction box design featuring a pivotally coupled lid and a clamping mechanism with a U-shaped spring member, allowing for quick and secure connection of electrical cables through tapered terminal apertures and a cable sleeve lock, facilitating efficient cable management and reduced termination time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional junction boxes with screw-fit connection terminals are used, then reliable electrical connections are achieved, but wiring becomes time-consuming and complex
Solution Approach 1:
The patent replaces the traditional screw-fit mechanical connection system with a spring-loaded clamping mechanism. The spring member applies continuous mechanical pressure to clamp the conductor onto the connection terminal, eliminating the need for screws while maintaining reliable electrical connection. This substitution reduces wiring complexity and time while preserving connection reliability.
Solution Approach 2:
The spring member is pre-loaded and automatically clamps the conductor when the lid is closed, without requiring manual tightening or adjustment by the installer. The mechanism self-regulates the clamping force through the spring's inherent elasticity, making the connection process simpler and faster while ensuring consistent connection quality.
2Ease of repair
If push-fit junction boxes with removable lids are used, then ease of maintenance is improved, but wiring complexity increases
Solution Approach 1:
The junction box is divided into a main body and a removable lid that pivots open. This segmentation allows the lid to be easily removed for maintenance access while keeping the wiring compartment sealed during normal operation. The spring-loaded clamping mechanism is integrated within this segmented structure, maintaining simplicity in the wiring process while enabling easy maintenance.
3Reliability
If traditional wiring methods are used, then connection security is ensured, but installation efficiency decreases
Solution Approach 1:
The spring-loaded clamping mechanism replaces traditional screw-terminal wiring methods. The spring member automatically applies sufficient clamping force to ensure secure electrical connection when the lid is closed, eliminating the need for manual screw tightening. This mechanical substitution maintains connection security while dramatically improving installation efficiency by reducing wiring steps and time.
Solution Approach 2:
The spring member is pre-loaded with stored elastic energy during manufacturing. When the lid is closed, this pre-loaded spring automatically engages and clamps the conductor onto the terminal without requiring additional manual force or adjustment. This preliminary preparation of the clamping force ensures secure connections while speeding up the installation process.
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 modular design significantly reduces the time required for wiring and maintenance by enabling fast and secure connections of electrical cables, enhancing safety and efficiency in electrical installations.
Implementation Method 1
a spring member mounted on the frame... the spring member being configured to be displaced by a lever mechanism associated with the lid
Implementation Method 2
the lever mechanism includes a cam surface operative to displace the spring member as the lid pivots between the open and closed position
Implementation Method 3
the at least one terminal aperture is tapered (e.g. with a cross-sectional area that decreases with increased distance from the entry port)
Data Source
AI summary
An electrical junction box (10) comprising: a housing (110) defining a chamber (120) with an entry port (130) for receiving an electrical cable; and at least one connection terminal (170) provided within the chamber (120) and configured to engage an exposed conductor end of the electrical cable, the at least one connection terminal (170) comprising a clamping mechanism (180) for connecting a conductor of the electrical cable to the electrical junction box (10); wherein the housing (110) comprises a main body portion (150) and a lid (160) movably coupled to the main body portion (150), the main body portion (150) and the lid (160) together forming the chamber (120) and the entry port (130), the lid (160) being movable relative to the main body portion (150) from an open position in which the chamber (120) is accessible and a closed position in which the chamber (120) is covered, wherein movement of the lid (160) from the open position to the closed position causes the clamping mechanism (180) to clamp the exposed end of the electrical cable.