Connector TPA Position Detection for Terminal Seating Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing connectors lack effective means to ensure proper terminal insertion and prevent mating when terminals are not fully seated, leading to potential electrical misalignment and mechanical coupling issues, especially in miniaturized designs where pitch distance is critical.
Innovation Solution
A connector design featuring a TPA member with guiding means and spring fingers that cooperate with the connector housing to prevent mechanical coupling when terminals are not fully inserted, ensuring proper seating and locking, and allowing mating only when all terminals are correctly positioned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If terminals are arranged with small pitch distance for miniaturization, then connector size is reduced, but it becomes difficult to ensure proper terminal insertion and detect improper seating
Solution Approach 1:
The patent introduces TPA position detecting means as an intermediary mechanism between the terminals and the TPA member. This detecting means, consisting of spring fingers with stop members, acts as a mediator to sense the position of each terminal and transmit this information to the TPA member, enabling reliable detection of improper terminal seating even in miniaturized connectors with small pitch distances
Solution Approach 2:
The spring fingers are designed to automatically detect terminal position and trigger the TPA member to prevent coupling when terminals are improperly seated. The system performs self-diagnosis and self-protection without requiring external intervention, as the spring fingers naturally deflect when terminals are not fully inserted and this deflection is converted into a mechanical stop that prevents connector coupling
2Reliability
If TPA member is added to ensure terminal position assurance, then terminal seating reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the TPA function with the coupling prevention function into a single integrated TPA member. The TPA member combines terminal position sensing capabilities with the ability to mechanically prevent connector coupling when terminals are improperly seated, eliminating the need for separate detection and prevention mechanisms
Solution Approach 2:
The TPA member serves multiple functions simultaneously: it acts as a terminal position detector, a mechanical lock, and a coupling prevention device. The spring fingers serve dual purposes as both terminal position sensors and as mechanical elements that trigger the TPA member to prevent improper coupling, reducing the overall number of components needed
3Reliability
If automatic TPA position detecting means is implemented, then coupling prevention reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces complex electronic or automated detection systems with a purely mechanical detection and prevention mechanism. The spring fingers and TPA member use mechanical deflection and engagement to detect terminal position and prevent improper coupling, simplifying manufacturing while maintaining high reliability through passive mechanical operation
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 solution effectively prevents incorrect assembly and mating by detecting proper terminal position, ensuring secure and reliable electrical connections even under heavy vibrations and excessive force, while allowing for easy testing and extraction of terminals.
Implementation Method 1
at least one spring finger (55) with a stop member (57) on the TPA member (20)
Data Source
Figure 1~2
Figure 3
Figure 4~6
AI summary
A connector (1) with a TPA member (20) for locking the latching elements (12) of the terminals (31). When one of the terminals (31) is not in its fully inserted position, the TPA member is prevented from reaching its final position which is detected by TPA position detecting means (50) that prevents mating of the connector with the complementary connector.