Female Terminal Fitting Excessive Deflection Regulation
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Solution Overview
Problem
Existing female terminal fittings face issues with excessive deflection of resilient contact pieces, which can lead to impaired electrical connection reliability due to the presence of external matters entering through holes in the side wall, particularly near the contact area.
Innovation Solution
The integration of excessive deflection regulating pieces on the resilient contact piece, assisted by an auxiliary spring piece, prevents excessive deflection without creating holes on the side wall, ensuring stable regulation of the contact piece's movement and maintaining electrical reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a hole is made on the side wall to form an excessive deflection preventing piece, then excessive deflection of the resilient contact piece is prevented, but external matters can enter the main body portion through the hole and adhere to the contact portion, impairing electrical connection reliability
Solution Approach 1:
The excessive deflection preventing function is extracted from the side wall structure and integrated into the resilient contact piece itself through the excessive deflection regulating piece. This eliminates the need for holes in the side wall while maintaining the deflection prevention function, thereby preventing external matter entry and preserving electrical connection reliability.
Solution Approach 2:
The excessive deflection regulating piece is integrally formed with the resilient contact piece, merging the deflection prevention function with the contact piece structure. This integration eliminates separate components and holes in the side wall, preventing external matter entry while maintaining both mechanical stability and electrical reliability.
2Reliability
If the resilient contact piece is made more resilient to ensure good contact, then contact reliability is improved, but the contact piece may excessively deflect and lose stability
Solution Approach 1:
The excessive deflection regulating piece provides dynamic regulation by coming into contact with the base wall only when the resilient contact piece exceeds its normal deflection range. This allows the contact piece to maintain high resilience for normal operation while automatically limiting excessive deflection, thus balancing contact reliability and deflection stability.
Solution Approach 2:
The regulating piece changes the effective deflection parameter of the resilient contact piece by providing a mechanical stop at the base wall. This allows the contact piece to have sufficient resilience for reliable contact while preventing excessive deflection that would compromise stability, effectively optimizing both parameters simultaneously.
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
This solution effectively prevents excessive deflection of the resilient contact piece, maintains electrical connection reliability, and adjusts the deflection amount by controlling the bending of the regulating pieces, ensuring proper contact and reduced protrusion, thus enhancing the stability and reliability of the electrical connection.
Implementation Method 1
a resilient contact piece deflectably arranged in the main body portion, the resilient contact piece being resiliently deformed toward a base wall of the main body portion to resiliently come into contact with the male tab
Implementation Method 2
a spring force of the resilient contact piece is assisted by the contact of a free end part of the auxiliary spring piece with the resilient contact piece in a deflecting direction thereof
Data Source
AI summary
A female terminal fitting (10) is provided with a tubular main body portion (20) into which a mating male tab (90) is to be inserted, and a resilient contact piece (21) deflectably arranged in the main body portion (20). The resilient contact piece (21) is resiliently deformed toward a base wall (22) of the main body portion (20) to resiliently come into contact with the male tab (90) when the male tab (90) is inserted into the main body portion (20). An excessive deflection regulating piece (33) for regulating excessive deflection of the resilient contact piece (21) by coming into contact with the base wall (22) of the main body portion (20) is integrally provided to the resilient contact piece (21).