Electrical Connector Terminal Position Assurance Stuffer
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Solution Overview
Problem
Existing electrical connectors often fail to ensure complete installation of terminals into connector housing, leading to improper connections and potential failure of the entire connector system due to retention feature dysfunction or terminal misalignment.
Innovation Solution
The electrical connector design incorporates a stuffer with multiple teeth that engage tabs on the terminals, ensuring they are fully loaded into channels, and features two stuffers positioned above and below the terminal rows to prevent unintentional movement and ensure proper alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a retention feature is added to prevent terminal movement, then terminal retention is improved, but the device complexity increases
Solution Approach 1:
The retention feature is divided into multiple discrete tabs extending from the terminal, with each tab engaging a corresponding cavity in the housing. This segmentation allows the retention function to be distributed across multiple simple engagement points rather than requiring a single complex retention mechanism.
Solution Approach 2:
The terminal structure itself provides the retention function through its own tabs, eliminating the need for separate retention components. The terminal's tabs automatically engage with the housing cavities when the terminal is inserted, creating a self-retaining system that reduces overall device complexity.
2Manufacturing precision
If a restraining device is added to push terminals into position, then terminal positioning is improved, but the ease of operation deteriorates due to difficulty in accessing terminals behind insulated wires
Solution Approach 1:
Instead of trying to push the terminal forward from the front, the solution engages the terminal from the rear by catching the tabs extending from the terminal's rear end. This inverted approach allows access from the rear of the housing where there is more space, avoiding the crowding problem at the front where insulated wires are located.
Solution Approach 2:
The tabs extending from the terminal serve as an intermediary element that can be engaged by the retention feature. These tabs provide a accessible interface between the terminal and the housing, allowing the retention mechanism to act on the terminal without requiring direct access to the terminal body itself.
Data Source
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AI summary
Electrical connector (102) includes housing (108), terminals (204), and stuffer (202). The housing has a plurality of terminal channels (228) extending from a rear (112) to a front (110) of the housing. The front of the housing is configured to interface with mating connector (104). The terminals are loaded into corresponding terminal channels from the rear of the housing, and extend along terminal axis (208) between mating end (210) and terminating end (212). The terminating end includes at least one tab (226) protruding radially outward from the terminal axis. The stuffer couples to the rear of the housing and includes multiple teeth (274) received in corresponding terminal channels. When one terminal is not fully loaded in the terminal channel, the corresponding tooth engages one or more of the at least one tab of the terminal and forces the terminal further into the terminal channel.