Connector Position Assurance Element for Electrical Connectors
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Solution Overview
Problem
Connector systems face issues with unintentional uncoupling due to incomplete mating or external forces, leading to breaks in the conductive pathway, which can be difficult to detect and remediate, especially in complex assemblies like automobiles.
Innovation Solution
The implementation of a connector position assurance (CPA) element that moves between extended and inserted positions, providing tactile, visual, or audible feedback to ensure full mating and preventing unintentional uncoupling by engaging a latch with a mating connector, thus securing the coupling mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If connectors are designed with small size and shielded conductors, then miniaturization and shielding effectiveness are improved, but detection precision of mating status deteriorates
Solution Approach 1:
A CPA element is introduced as an intermediary indicator between the connector components and the observer. This element provides visual feedback about mating status without requiring direct observation of the small connector components themselves, thus solving the detection difficulty caused by miniaturization.
Solution Approach 2:
The CPA element changes its visual appearance (position, color, or orientation) to indicate different mating states. This allows operators to easily detect mating status through visual cues rather than attempting to measure the physical position of small connector components directly.
2Strength
If connectors rely on latch-catch engagement, then coupling strength is improved, but reliability against unintentional uncoupling deteriorates
Solution Approach 1:
The CPA element provides real-time visual feedback about the engagement state of the latch-catch mechanism. This allows operators to verify proper engagement and detect potential issues before they lead to unintentional uncoupling, thereby improving reliability without compromising coupling strength.
Solution Approach 2:
The CPA element allows operators to verify mating status before final engagement or operation. This preliminary verification prevents incomplete mating from leading to operational failures and enables corrective action before the connector is put into service.
3Device complexity
If assembly operations are performed without visual indicators, then device complexity is reduced, but manufacturing precision of mating status deteriorates
Solution Approach 1:
The CPA element serves as a simple visual intermediary that translates complex mechanical engagement into easily observable states. This allows operators to achieve precise mating without requiring complex measurement tools or sophisticated assembly mechanisms.
Solution Approach 2:
The CPA element uses visual changes (such as color changes or position changes) to indicate mating status, providing clear feedback to operators during assembly. This simple visual indication system achieves high manufacturing precision without adding significant complexity to the assembly mechanism.
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
Ensures that connectors are fully mated and securely locked, preventing breaks in the conductive pathway and simplifying the identification of faulty connections, thereby reducing errors and improving assembly reliability.
Implementation Method 1
The first beam has a first arm and a first finger at a front end of the first beam. The first finger has an abutment wall at the front end configured to abut against the first protrusion and a tip configured to be engaged by the mating connector when received in the cavity. The tip is deflected from a blocked position to a released position as the mating connector is loaded into the cavity.
Data Source
AI summary
An electrical connector includes a housing having an upper wall and a first protrusion and a CPA element slidably coupled to the housing along the upper wall between an extended position and an inserted position. The CPA element includes a base and a first beam extending from the base having a first arm and a first finger including an abutment wall configured to abut against the first protrusion and a tip configured to be engaged by a mating connector when received in the housing. The tip is deflected from a blocked position to a released position with the distal end engaging the protrusion in the blocked position and the tip being deflected outside of the protrusion to the released position where the tip is able to clear past the protrusion to allow the CPA element to be moved from the extended position to the inserted position. The CPA may be configured so that in the extended position it is to block release of a pivotal latch used to retain the connector to a mating connector.