Self-locking Plug Key Mechanism Linkage Design
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Solution Overview
Problem
Existing electrical connectors face challenges in compact designs where release controls are difficult to access due to limited space, and locking tabs are prone to scratching and accidental disconnection.
Innovation Solution
A self-locking plug design featuring a key mechanism with a lever-type structure and linkage that allows for easy switching of locking tabs between locking and releasing states, reducing abrasion and improving usability in compact spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking tab is provided to prevent accidental disconnection, then connection reliability is improved, but the locking tab is prone to scratching and wear
Solution Approach 1:
Instead of having the locking tab directly engage with the socket, the patent inverts the interaction by having the locking tab engage with a separate linkage mechanism. The linkage then transmits the locking force to the socket, isolating the locking tab from direct contact and abrasion with the socket body.
Solution Approach 2:
The patent introduces a linkage mechanism as an intermediary between the locking tab and the socket. This linkage acts as a mediator that transfers the locking action from the tab to the socket, preventing direct contact and reducing wear on the locking tab while maintaining reliable connection.
2Volume of moving object
If the plug design is made compact, then space utilization is improved, but release controls become difficult to access
Solution Approach 1:
The patent positions the release control on the side surface of the plug rather than on the top or front surface. This dimensional relocation allows users to access the release control from the side, maintaining ease of operation even in compact designs where traditional control positions would be inaccessible.
3Ease of operation
If the key mechanism has a large range of action, then switching between locking and releasing states is easier, but it causes interference with surrounding parts in compact spaces
Solution Approach 1:
The patent employs a spring-loaded key mechanism that dynamically adjusts its position. The spring allows the key to move freely within a limited range, providing sufficient travel for reliable locking and releasing while automatically returning to a neutral position that prevents interference with surrounding components in compact plug designs.
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 self-locking plug design enhances user safety and service life by minimizing tab abrasion, aligning with user operating habits, and allowing for smooth plugging/unplugging actions without interference, suitable for compact operation spaces.
Implementation Method 1
a spring-embedded groove with an opening at a rear end is arranged on the linkage for positioning a return spring
Data Source
AI summary
A self-locking plug includes a main body, a plug bush seat arranged in the main body for positioning a plug bush, at least one locking tab, and a linkage. The self-locking plug further includes a key mechanism arranged in the main body. The key mechanism includes a pressing portion and a driving portion which are respectively arranged at two ends of the key mechanism. The driving portion is associated with one end of the linkage, and is configured to drive the linkage to reciprocate in an axial direction of the main body to switch the locking tab between a releasing state and a locking state.