Hinged TPA Connector Locking for Terminal Position Assurance
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Solution Overview
Problem
Connectors often experience terminal displacement during assembly or use due to vibration, leading to poor connections, as existing solutions fail to ensure proper terminal positioning and secure locking.
Innovation Solution
A connector assembly with a position assurance member, featuring a hinge portion, a cantilevered head with a locking portion, and a reworking groove, which is integrally formed with the body to verify terminal positions and prevent displacement by locking into a coupling groove, and can be reopened using an opening tool for reoperation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a TPA member is provided to verify terminal position, then terminal positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The TPA member is integrally formed with the connector body as a single piece, combining the verification function with the structural component. This eliminates the need for separate verification mechanisms while maintaining terminal positioning accuracy through the locked TPA member's engagement with terminal positions.
Solution Approach 2:
The TPA member automatically verifies terminal positions through its own structural engagement with the terminals and coupling groove. When the terminal is correctly positioned, the TPA member locks into place without requiring external verification tools or additional operational steps, making the system self-verifying.
2Reliability
If a locking mechanism is added to prevent terminal displacement, then connection reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The TPA member includes a reworking groove that allows the locking mechanism to be deliberately disengaged using an opening tool. This enables recovery or adjustment of terminal positions when needed, while maintaining secure locking during normal operation. The system transitions between locked (reliable) and unlockable (adjustable) states as required.
3Stability of the object's composition
If the TPA member is made secure and locked, then terminal position stability is improved, but ease of repair deteriorates
Solution Approach 1:
The reworking groove provides a dedicated access path for opening tools to disengage the locked TPA member. This allows repair personnel to easily reopen and adjust terminals when needed, while the integral formation with the connector body maintains structural stability during normal use. The locked state provides stability, while the groove enables recovery when required.
Data Source
AI summary
A connector assembly comprises a body and a position assurance member. The body includes a plurality of terminals and a coupling groove exposing a portion of the plurality of terminals. The position assurance member is formed integrally with the body and is adapted to verify a position of the plurality of terminals when inserted in the coupling groove. The position assurance member includes a hinge portion enabling its rotation around the body, a head, and a reworking groove. The head extends in a cantilever manner from the hinge portion, and defines a locking portion insertable in the coupling groove to be locked and coupled thereto. The reworking groove is formed below or adjacent to the locking portion in the head and enables the position assurance member to be reopened as an opening tool is inserted therein.