Connector Detection Hole Layout to Protect Terminal Contact Pieces
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Solution Overview
Problem
Existing connectors face damage and deformation issues during continuity inspection due to the contact of inspection pins with electrical contact portions, which are critical for the terminal fitting's functionality.
Innovation Solution
A connector design featuring a housing with a terminal accommodation chamber, a terminal fitting with a tube portion and resilient contact piece, and a detection hole separate from the tab insertion hole, where the detection pin contacts a front plate portion instead of the resilient contact piece, preventing damage and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an inspection pin is inserted into the insertion hole to perform continuity inspection, then the electrical contact portion can be inspected, but the electrical contact portion may be deformed and the terminal fitting cannot exhibit original functions
Solution Approach 1:
The insertion hole is divided into two separate holes: a tab insertion hole for mating terminal connection and a detection hole for inspection pins. This segmentation allows continuity inspection to be performed without the inspection pin contacting the electrical contact portion, thereby preventing deformation while maintaining inspection capability
Solution Approach 2:
A front plate portion is introduced as an intermediary structure that the detection pin contacts during inspection. This intermediary allows the inspection function to be performed without direct contact between the inspection pin and the electrical contact portion, preventing damage to the critical contact area
Data Source
AI summary
It is aimed to prevent the damage and deformation of a terminal fitting. A connector is provided with a housing including a terminal accommodation chamber, and a terminal fitting including a tube portion and a resilient contact piece accommodated in the tube portion, the terminal fitting being inserted into the terminal accommodation chamber. A front wall portion of the housing is formed with a tab insertion hole into which a tab (T) of a mating terminal is inserted to enter the tube portion from front and contact the resilient contact piece. A left front plate portion is formed forward of the resilient contact piece in the terminal fitting. The front wall portion of the housing is formed with a detection hole open separately from the tab insertion hole. The detection hole is disposed at a position facing the left front plate portion in the front wall portion.