Dual-latch Quick Connector for Fluid Lines
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Solution Overview
Problem
Existing fluid line connectors lack verification of proper connection and leak-proofing, particularly during installation and vehicle operation, and may not prevent unintended release or incorrect insertion.
Innovation Solution
A dual-latch system requiring two sequential operations: an audible confirmation of initial attachment with a spring latch and a secondary sliding lock latch that prevents unintended release, with the sliding lock latch also preventing insertion if moved to its locked position before the fluid line is inserted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single latch system is used for quick connection, then installation speed is improved, but connection reliability and verification are insufficient
Solution Approach 1:
The connection system is segmented into two distinct latch mechanisms: a spring latch for initial quick connection and an operator-manipulated sliding lock latch for secondary verification and secure locking. This segmentation allows the system to maintain fast installation while adding reliability through sequential engagement of multiple independent locking mechanisms.
2Reliability
If a robust locking arrangement is added to prevent unintended release, then connection reliability is improved, but device complexity increases
Solution Approach 1:
The spring latch and sliding lock latch are merged into a single integrated connector body, sharing common structural elements and mounting points. This merging approach allows the addition of a secondary locking mechanism while minimizing the increase in overall device complexity and maintaining a compact design.
3Reliability
If verification of proper connection position is implemented, then connection reliability is improved, but ease of operation is reduced
Solution Approach 1:
The spring latch provides immediate tactile and audible feedback upon engagement with the fluid line bead, confirming proper connection position to the installer. This feedback mechanism allows verification of correct installation without adding complex verification systems, maintaining ease of operation while improving reliability.
4Ease of operation
If a release button mechanism is included for quick disconnection, then ease of operation is improved, but risk of unintended release increases
Solution Approach 1:
The sliding lock latch is designed to be engaged as a preliminary action before the spring latch is fully compressed during normal operation. This preliminary locking action prevents unintended release by securing the connection before any release forces can act on the spring latch 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 a secure and leak-proof connection with audible confirmation of proper installation and prevents accidental release or incorrect insertion, enhancing the reliability and safety of fluid line connections.
Implementation Method 1
a spring latch... engaging with a radially enlarged upset or bead formed on the fluid line
Implementation Method 2
a sliding lock latch... when engaged, prevents the unintended release of the line from the connector
Data Source
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AI summary
A dual-latch system requiring two distinct and sequential operations to verify that a proper connection has been made is disclosed. In the first operation, the fluid line is installed into the quick connector and is attached. In the second operation, the fluid line is locked into the quick connector using a separate sliding lock latch. The connector assembly (10) comprises a housing (12) having an inner bore for receiving a portion of the fluid line, a spring latch (20) having radially-spaced engaging bodies for engaging the raised upset or bead of the fluid line, and a sliding lock latch (24) having spring release interference abutments. The sliding lock latch is movable from an unlocked position in which the abutments allow movement of the engaging bodies relative to the raised upset or bead to a locked position in which the abutments restrict movement of the engaging bodies to the raised upset or bead engaging position.