TPA Part Guides Electrical Pins in Automotive Connectors
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electrical connectors originally designed for small household appliances face challenges when repurposed for automobiles, as they are subjected to harsher assembly environments, leading to increased risks of pin damage and connection failure due to uncontrolled pin bending and incorrect manipulation during assembly.
Innovation Solution
A male connector with a Terminal Position Assurance (TPA) part is designed to guide and constrain electrical pins within a socket, preventing pins exceeding the allowed bending tolerance from entering the engagement region and reducing the ability of pins to bend during mating, thereby enhancing connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrical connectors originally designed for small household appliances are repurposed for automobiles, then cost-effectiveness and compactness are improved, but reliability deteriorates due to uncontrolled pin bending and distortion in harsher assembly environments
Solution Approach 1:
The TPA part is installed in the engagement region before pins are inserted, performing preliminary guidance and constraint actions. The TPA part pre-establishes the correct positioning and movement constraints for pins, ensuring they follow the proper insertion path and are constrained in the correct position before actual engagement occurs, preventing bending and distortion that would compromise reliability
Solution Approach 2:
The TPA part acts as an intermediary component between the socket and the pins. It mediates the interaction by providing guidance surfaces and constraint structures that control pin movement, ensuring pins are properly aligned and constrained during insertion and engagement, thereby protecting the connection reliability while maintaining cost-effectiveness
2Reliability
If electrical connectors are designed with advanced safety features such as coding, sealing, and Kojiri-safe features, then reliability is improved, but device complexity increases
Solution Approach 1:
The TPA part is a separate, standalone component that can be independently manufactured and installed in the engagement region. This segmentation allows the constraint function to be added without redesigning the entire connector assembly, maintaining simplicity of the main connector structure while providing enhanced reliability through the added TPA component
Solution Approach 2:
The TPA part serves multiple functions simultaneously: it guides pins during insertion, constrains pins in the correct position, prevents pin bending and distortion, and ensures proper engagement. This multi-functionality provides comprehensive reliability improvement through a single component rather than requiring multiple separate safety features, thereby avoiding excessive complexity
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A male connector for connecting to a female connector to provide an electrical connection between conductors of the male connector and the female connector is provided. The male connector comprises a header part configured to connect to the female connector. The header part comprises an socket providing an engagement region for receiving the female connector and for housing one or more electrical pins configured to be received by one or more female terminals of the female connector to provide the electrical connection when the header part and the female connector are connected. The male connector also comprises a terminal position assurance, TPA, part configured to be received by the engagement region of the socket of the header part and to guide the one or more electrical pins through one or more holes in the TPA part and into the engagement region of the socket. The TPA part is configured to constrain the one or more electrical pins in the engagement region of the socket.