Tool-Free Wire Termination With Rotating Lever Mechanism
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Solution Overview
Problem
Existing wiring devices lack convenient and tool-free methods for securely terminating wires of various gauges without exposing users to line voltage.
Innovation Solution
A wiring device with a conductive member and a manually rotatable lever, where the lever is positioned to allow wire insertion and securement, utilizing a resilient member and locking structures to ensure securement and isolation from line voltage, allowing for easy insertion and removal of wires without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional side-wire or back-wire termination is used, then the wire can be securely terminated, but the process requires tools and exposes users to line voltage
Solution Approach 1:
The lever mechanism allows the wire termination device to secure the wire itself through manual lever actuation, eliminating the need for external tools like screwdrivers. The lever rotates to automatically position the clamp and apply clamping force, making the system self-sufficient for wire securement.
Solution Approach 2:
The lever acts as an intermediary mechanism between the user's manual input and the wire securement action. It translates manual lever rotation into precise positioning and clamping force application, mediating the interaction between user and wire termination while maintaining safety isolation.
2Ease of operation
If a push-in termination with cage clamp is used, then tool-free insertion is achieved, but the wire cannot be easily removed and requires tools for release
Solution Approach 1:
The lever mechanism provides dynamic control over the clamp's clamping force. By rotating the lever, the user can adjust the clamp position and apply force progressively. The same dynamic action in reverse allows easy release of the clamp and wire removal, eliminating the static, tool-locked nature of traditional push-in terminations.
3Adaptability or versatility
If multiple wire gauges need to be accommodated, then versatility is improved, but the termination mechanism complexity increases
Solution Approach 1:
The clamp design incorporates adjustable parameters including lever rotation angle, clamp position along the lever arm, and clamping force magnitude. These variable parameters allow the same mechanism to adapt to different wire gauges without requiring multiple specialized components, maintaining simplicity while achieving versatility.
4Ease of operation
If the conductive member is exposed for wire termination, then wire access is simplified, but user exposure to line voltage occurs
Solution Approach 1:
The lever serves as a safety intermediary that allows wire insertion and termination while maintaining physical isolation between the user and the exposed conductive member. The lever mechanism enables wire manipulation from a safe distance, mediating the interaction to eliminate direct user contact with live components.
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
Enables secure and tool-free termination of wires of different gauges while ensuring all accessible surfaces are electrically isolated from line voltage, simplifying the termination process and reducing manufacturing complexities.
Implementation Method 1
The conductive member includes a resilient member formed therein; the resilient member, the lever and the conductive member are configured to interact with one another to allow securement of wires of different gauges with the conductive member.
Implementation Method 2
The lever includes a rotational axis and an eccentric surface defined with respect to the axis. When the lever is in the first position, the lever allows a wire to be inserted into the wire termination. When the lever is in the second position, the lever causes the eccentric surface to secure the wire to the conductive member.
Data Source
AI summary
An electrical termination and method comprising an element and a conductive member is disclosed. A wire is manually or tool-lessly securable in electrical communication with the conductive member.