Quick Connector Visual Verification for Fluid-Tight Coupling
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Solution Overview
Problem
There is a need for a reliable and quick verification mechanism to ensure a fluid-tight connection between male and female connector components in quick connector assemblies, particularly in automotive applications, to prevent unwanted leaking and simplify assembly processes.
Innovation Solution
A quick connector assembly with a housing, retainer, and male connector design that includes a visual indicator system, where a protrusion engages the indicator body to move it from a concealed to a viewable position when the connector is properly assembled, providing visual evidence of a secure connection, and a lock mechanism to maintain the assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional quick connector assembly is used without verification mechanism, then the assembly process is simple and quick, but the reliability of the fluid-tight connection cannot be ensured
Solution Approach 1:
The connector assembly performs self-verification through the indicator mechanism. When the male connector is properly inserted, the indicator automatically moves to display the coupled position, providing self-service verification without requiring external inspection tools or complex verification procedures.
Solution Approach 2:
The indicator provides visual feedback through position changes that can be associated with color or visual state changes. The indicator's movement between concealed and visible positions creates a clear visual distinction between coupled and decoupled states, enabling quick verification of connection reliability.
2Reliability
If a verification mechanism is added to ensure proper connection, then the connection reliability is improved, but the assembly time and complexity increase
Solution Approach 1:
The verification mechanism operates automatically as the connector is being assembled. The indicator moves itself in response to the insertion force, providing real-time verification during the assembly process rather than requiring a separate verification step, thus minimizing time loss.
Solution Approach 2:
The indicator is pre-positioned within the housing bore, ready to provide verification information as soon as the connector is inserted. The verification capability is prepared in advance, eliminating the need for post-assembly inspection and reducing total assembly time.
3Difficulty of detecting and measuring
If an indicator system is implemented to show connection status, then the ease of detection is improved, but the device complexity increases
Solution Approach 1:
The indicator system is self-actuating, moving automatically in response to the mechanical insertion of the connector. No external power source, control system, or complex actuation mechanism is required - the insertion force itself drives the indicator to the appropriate position.
Solution Approach 2:
The indicator acts as a simple mechanical intermediary between the connector insertion action and the visual verification need. It translates the mechanical state (inserted or not inserted) into a visible signal without requiring complex electronics or control systems.
4Measurement precision
If a retainer and indicator mechanism are added to verify assembly, then the measurement precision of connection status is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The verification function is segmented into distinct components: the indicator body, the indicator surface, the retainer, and the housing bore. This segmentation allows each component to be manufactured independently with standard tolerances, reducing the need for high-precision machining of the entire assembly as a single unit.
Solution Approach 2:
The indicator serves as a mechanical intermediary that amplifies small positional differences into clearly distinguishable visual states. This mechanical leverage allows for reliable verification even when manufacturing tolerances of individual components are not extremely tight, as the indicator's movement accumulates small displacements into a clearly visible position change.
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
The solution ensures a reliable fluid-tight seal is established, allowing for easy detection of complete assembly and preventing leaks, while simplifying the assembly process and reducing fabrication complexity.
Implementation Method 1
The protrusion engages and compresses the indicator body when the male connector is in the coupled position
Data Source
AI summary
A connector assembly and method of making a fluid-tight connection therewith is provided. The assembly includes a housing having a tubular wall bounding a bore extending between opposite first and second ends. The bore has first and second diameter portions with a shoulder extending radially therebetween. A covered portion of a channel extends from the housing second end toward the housing first end to an uncovered portion of the channel. A retainer is disposed in the bore. An indicator body, received in the channel, extends from the retainer outwardly to an indicator surface. A male connector has a tubular wall moveable in the bore between decoupled and coupled positions. A protrusion extends outwardly from the male connector tubular wall. The indicator surface is partially concealed within the covered portion of the channel when the male connector is in the decoupled position. The protrusion compresses the indicator body when the male connector moves to the coupled position, whereupon the indicator surface is moved entirely into the uncovered portion of the channel.