TPA Connector Hinge and Channel Design for Terminal Retention
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Solution Overview
Problem
Existing connector designs with terminal position assurance (TPA) features lack reliability and ease of use in ensuring terminals are properly retained and positioned, often requiring separate components and complex hinge mechanisms that can be difficult to attach or misalign during assembly.
Innovation Solution
A connector with a housing featuring discrete insulated channels and a hinged TPA member that can translate from an open to a locked position, utilizing a wide hinge for controlled translation and a one-piece molded design to ensure terminal positioning and retention, including a u-shaped pushing flange and locking tab for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate TPA components are used to ensure terminal retention, then terminal positioning reliability is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The patent integrates the TPA functionality directly into the housing structure, merging what were previously separate components into a unified design. The housing now includes built-in features such as retention arms and positioning elements that perform TPA functions, eliminating the need for separate TPA components and reducing overall device complexity while maintaining terminal positioning reliability
Solution Approach 2:
The housing is designed to serve multiple functions simultaneously: it provides structural support, guides terminal insertion, retains terminals in position, and ensures proper alignment. By making the housing multi-functional, the patent eliminates the need for dedicated separate TPA components, reducing device complexity while maintaining or improving terminal positioning reliability
2Reliability
If complex hinge mechanisms are used for TPA, then terminal retention is improved, but ease of operation deteriorates
Solution Approach 1:
The patent removes the hinge mechanism entirely from the TPA design, extracting the problematic complex moving part. The TPA is implemented as a simple snap-fit or elastic retention system that requires no hinges, joints, or moving components, thereby dramatically improving ease of operation while maintaining terminal retention through elastic deformation and geometric locking features
3Manufacturing precision
If separate TPA components are used, then terminal positioning is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the TPA functionality into the housing, allowing both components to be manufactured as a single integrated piece. This merging enables more efficient manufacturing processes such as single-shot molding or extrusion, reducing the number of manufacturing steps, materials required, and assembly operations, thereby lowering overall manufacturing cost while maintaining terminal positioning precision through precisely formed geometric features
Data Source
AI summary
A connector is provided which has a housing and a terminal position assurance (TPA) member. The housing has a base which includes a first side, a second side and a top surface that extends between the first and second side. The base further includes a channel. The TPA member extends from the top surface of the base. The TPA member has a hinge that substantially extends from the first side to the second side of the base. The hinge extends from the top surface and connects the TPA member to the top surface. The TPA member includes a rear edge that is configured to rotate approximately one-hundred eighty (180) degrees so as to press against the base. The TPA member includes a pushing flange that extends past the rear edge. The pushing flange is configured to be inserted into the channel.