L-Shaped Flag Terminal Insulator with Snap-Fit Cover
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Solution Overview
Problem
Recent standards for consumer appliances require fully insulated flag terminals to prevent accidental contact with exposed terminals, but existing flag terminals lack comprehensive insulation, especially for quick-connect applications.
Innovation Solution
A fully insulating flag terminal insulator with a housing and rear cover, featuring an L-shaped design, snap-fit tabs, and optional capture mechanism, made from electrically insulating materials like nylon, ensuring complete coverage and secure attachment of the flag terminal perpendicular to the electrical wire connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flag terminals are made non-insulated or partially insulated to simplify structure and reduce cost, then manufacturing complexity and material usage are reduced, but safety is compromised due to exposed terminals causing accidental contact
Solution Approach 1:
The insulator is divided into two main segments: an L-shaped housing that provides the primary insulation structure, and a flat cover that seals the terminal opening. This segmentation allows each part to perform its specific function efficiently while maintaining overall safety requirements.
Solution Approach 2:
The flag terminal is nested within the L-shaped housing cavity, which is then covered by the flat cover. This nested structure ensures complete enclosure of the terminal, providing full insulation while maintaining a compact overall form factor.
2Reliability
If a flexible insulator is used to crimp the terminal onto the wire (fully insulated terminals), then safety is improved through complete coverage, but the insulator deformation complicates the manufacturing process
Solution Approach 1:
The L-shaped housing is designed with flexible material properties that allow it to deform during the crimping process. This flexibility enables the housing to conform to the terminal and wire assembly, ensuring complete insulation coverage while simplifying the manufacturing process through inherent material compliance rather than complex deformation mechanisms.
3Reliability
If the insulator is designed to fully enclose the terminal meeting safety standards, then safety is improved, but the device complexity increases due to additional components like housing, cover, and securing mechanisms
Solution Approach 1:
The L-shaped housing combines multiple functions into a single component: it provides the main insulation barrier, structures the terminal opening, positions the quick-connect interface, and integrates the securing mechanism for the cover. This merging reduces the total number of separate parts while maintaining complete terminal enclosure and safety requirements.
Solution Approach 2:
The flat cover serves multiple purposes simultaneously: it seals the terminal opening for complete insulation, provides a mounting surface for tabs, and integrates with the housing to form a complete insulator assembly. This multi-functionality reduces component count while achieving full safety compliance.
4Reliability
If tabs and apertures are added to secure the cover to the housing, then reliability of attachment is improved, but manufacturing precision requirements increase
Solution Approach 1:
The tab and aperture features are designed with specific dimensional parameters that provide tolerance compensation. The tabs have optimized widths and lengths that allow for slight misalignments during assembly, while the aperture dimensions are designed to accommodate normal manufacturing variations. This parameter optimization maintains reliable attachment without requiring extreme manufacturing precision.
Data Source
AI summary
An insulator adapted to receive a flag terminal. The insulator has a housing and a rear cover. The housing has an L shape with a base and a riser. The housing has a rectangular terminal opening at the base and a cavity that receives the flag terminal through the terminal opening. The flat is shaped to fit within the terminal opening and is secured by a securing mechanism that includes tabs on the cover that fit into apertures in the housing. The cover is installed by pushing it into the terminal opening. The housing flexes so that the tabs to snap into the corresponding apertures, thereby securing the cover in the terminal opening.