Lever-Actuated Banana Plug With Spring Clamp Wire Retention
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Solution Overview
Problem
Existing banana plugs require users to unscrew, insert, and tighten a set screw to secure wires, making the process time-consuming and difficult, especially for DIYers, and lack a way to quickly and easily make secure wire connections.
Innovation Solution
A unique banana plug design featuring a lever that actuates an internal spring to securely retain wires, allowing for toolless connection and disconnection, with a spring aperture that sandwiches the wire between the spring and a conductive busbar for a secure electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional banana plug design with set screw is used, then secure wire connection is achieved, but the installation process becomes time-consuming and difficult
Solution Approach 1:
The patent employs a dynamic lever mechanism that transitions between open and closed positions to automatically control the spring's compression state. When the lever is in the open position, the spring is compressed and the aperture is accessible for wire insertion. When closed, the spring expands to secure the wire, eliminating the need for manual screw tightening while maintaining connection security.
Solution Approach 2:
The spring-loaded mechanism performs the wire securing function automatically when the lever is closed. The spring's elastic force naturally clamps the wire between the busbar and the spring aperture without requiring additional fastening operations, making the system self-servicing and dramatically reducing installation time.
2Reliability
If a traditional banana plug design with set screw is used, then wire connection is secured, but the operation becomes difficult especially for DIYers
Solution Approach 1:
The mechanism automatically secures the wire through the spring's elastic force when the lever is closed, eliminating the need for users to manually tighten set screws or perform complex fastening operations. This self-securing feature makes the connection process accessible to DIYers without requiring specialized knowledge or tools.
Solution Approach 2:
The lever acts as an intermediary mechanism that translates simple user motion (opening and closing) into the complex action of spring compression and wire clamping. This intermediary lever simplifies the user's interaction while ensuring reliable wire securing through the spring-busbar-aperture sandwich structure.
3Ease of operation
If a lever-actuated spring mechanism is used, then quick and toolless connection is enabled, but the device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single integrated mechanism: the lever simultaneously controls spring compression, aperture positioning, and wire clamping force. The spring, busbar, and aperture are merged into a unified clamping system that works together through the lever's motion, reducing the need for separate components and simplifying the overall structure despite the added functionality.
4Reliability
If a spring aperture sandwich arrangement is used, then secure electrical connection is achieved, but manufacturing precision requirements increase
Solution Approach 1:
The spring's elastic properties allow the aperture position and clamping force to dynamically adjust based on the wire's diameter and material characteristics. This parameter flexibility compensates for variations in manufacturing tolerances of the aperture and busbar, ensuring reliable electrical connection across different wire sizes (12-24 AWG) without requiring extremely tight manufacturing precision.
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 quick and secure electrical connections without tools, reducing the risk of electrical shorts and improving connection reliability, while accommodating wire sizes from 12-24 AWG, facilitating easy installation and replacement.
Implementation Method 1
The spring is made from aluminum. In another example, the spring is made from stainless steel. The lever generally moves the spring from a first or open position configured to receive a wire to a second or closed position configured to retain the wire.
Data Source
AI summary
A banana plug including a body, a male portion, a female portion, and a lever. The male portion is configured to extend from the body to electrically connect with a receptacle. In one example, the receptacle is a piece of audio/video (AV) equipment. The female portion is configured to receive a wire and/or other electrical component. The lever is configured to actuate between an open position and a closed position. In the open position, the lever is configured to actuate an internal spring to receive a wire. In the closed position, the lever is configured to release the internal spring to secure and/or retain the wire via a compression force.