Push-in Electrical Terminal with Lever and Lift Tabs
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Solution Overview
Problem
Existing electrical terminals with push-in connections lack efficient mechanisms to securely engage and retain electrical wires, leading to potential disconnection issues.
Innovation Solution
An electrical terminal design featuring a lever with lift tabs and a terminal position assurance mechanism that moves between pre-lock and locked positions to securely engage both the conductor and insulation of a wire, ensuring a stable electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple push-in connection is used, then ease of operation is improved, but reliability of connection is worsened
Solution Approach 1:
The lever is designed to move between different positions (engaged and disengaged) to dynamically adjust the connection state. During insertion, the lever is displaced to allow wire entry, then automatically returns to engage and secure the wire, providing both ease of operation and reliable connection through dynamic motion
Solution Approach 2:
The lever incorporates a return mechanism that automatically returns the lever to its engaged position after wire insertion. This self-returning feature eliminates the need for additional actuation steps, allowing the terminal to secure the wire automatically while maintaining simple push-in operation
2Reliability
If a lever mechanism is added to improve connection security, then reliability is improved, but device complexity is worsened
Solution Approach 1:
The lever is integrated as part of the terminal body structure rather than being a separate component. The lever, lift tabs, and return mechanism are combined into a unified structure that works together to secure the wire, reducing the number of discrete parts while maintaining reliable connection
Solution Approach 2:
The lever serves multiple functions: it guides wire insertion, secures the wire through engagement, and automatically returns to lock the connection. The lift tabs extend from the lever to provide additional engagement points. This multi-functionality reduces the need for separate components, maintaining simplicity while improving reliability
Data Source
AI summary
An electrical terminal includes a terminal base. A mate portion is attached to the terminal base and is adapted to mate with a corresponding electrical terminal. A conductor contact portion includes a box attached to the terminal base. The box defines an interior space. A lever extends from a wall of the box. The lever includes a curved portion that extends toward the terminal base. The lever is adapted to engage a conductor of a wire inserted into the box. The lever includes lift tabs that extend from the lever to outside the box.