Rotating CPA Latch for Connector Assembly Lock Assurance
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Solution Overview
Problem
Existing connector assemblies lack a cost-effective way to integrate a Connector Position Assurance (CPA) device without redesigning both the connector and counter-connector, which increases manufacturing costs.
Innovation Solution
A rotatable latch design for the connector assembly that allows the CPA function to be added without changing the counter-connector's design, using a CPA device with a latch that rotates parallel to the mating direction, allowing for secondary locking means without altering the counter-connector's mold or assembly line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a CPA device is added to the connector assembly by redesigning both the connector and counter-connector, then the connector position assurance function is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The CPA device is extracted from the counter-connector and relocated to the connector only. The latch mechanism is mounted on the connector housing and rotates independently, while the counter-connector retains its original design without requiring any CPA-related features or modifications.
Solution Approach 2:
A rotating latch element acts as an intermediary between the connector and counter-connector. The latch rotates about an axis parallel to the mating direction and engages with a feature on the counter-connector only when properly mated, providing CPA functionality without requiring redesign of either component's basic structure.
2Reliability
If a CPA device is added to the connector assembly by redesigning both the connector and counter-connector, then the connector position assurance function is improved, but the manufacturing cost increases
Solution Approach 1:
The CPA device is extracted from the counter-connector and relocated to the connector only. The latch mechanism is mounted on the connector housing and rotates independently, while the counter-connector retains its original design without requiring any CPA-related features or modifications.
Solution Approach 2:
The rotating latch serves multiple functions: it provides CPA indication through its rotational position, acts as a locking mechanism when engaged, and enables detection of proper mating status. This multi-functionality is achieved within the connector only, avoiding the need for additional components in the counter-connector.
3Reliability
If a CPA device with translational movement is used, then the locking function is achieved, but the ease of operation and intuitive operation are reduced
Solution Approach 1:
The latch rotates about an axis rather than translating linearly, creating a rotational motion that is more intuitive for operators. The rotation about an axis parallel to the mating direction allows the latch to naturally follow the coupling motion, making the operation more ergonomic and easier to understand.
Solution Approach 2:
The latch is designed to rotate dynamically between locked and unlocked positions based on the mating status. The rotational movement allows the latch to respond naturally to the coupling forces and provides clear tactile feedback to the operator about the mating status.
Data Source
Figure 1~3
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Figure 6~7
AI summary
A connector assembly (1) comprising a connector (2) and a counter-connector (3) mated to each other. The counter-connector (3) comprises primary locking means (42, 43) comprising a rotatable coupling aid lever (6). The lever (6) being in a closed position when the connector (2) and counter-connector are fully coupled. The connector (2) comprises secondary locking means rotatably movable about an axis of rotation, between a locking position and an unlocking position and configured to cooperate, in the locking position, with the primary locking means (42, 43) to lock the lever (6) in the closed position.