Quick Connector Plunger Locking Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing quick connector assemblies lack a reliable safety mechanism to prevent accidental engagement of the locker with the male end form when it is not properly locked within the housing, leading to potential leaks or disengagement issues, especially in critical applications like automotive fuel lines.
Innovation Solution
A quick connector assembly featuring a plunger biased by a spring that restricts the locker to a non-engaged position until the male end form is inserted, then moves into an engaged position to lock the bead, providing visual confirmation of proper locking and sealing, and includes inside and outside legs to prevent partial engagement and ensure deliberate user action for disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the locker is allowed to move freely to the engaged position, then the connection can be established quickly, but the locker may accidentally engage without the male end form being properly inserted, causing leakage or disengagement
Solution Approach 1:
The plunger is positioned in advance to block the locker's path to the engaged position. Before the male end form is fully inserted, the plunger physically prevents the locker from engaging. Only after the male end form is properly inserted does the plunger move away, allowing the locker to engage. This preliminary blocking action ensures that quick engagement does not compromise locking reliability.
Solution Approach 2:
The plunger acts as an intermediary component between the male end form and the locker. It mediates the interaction by temporarily blocking the locker's movement and then clearing the path when the male end form is properly positioned. This intermediary mechanism ensures that the locker only engages when the connection is correct, preventing accidental engagement while maintaining quick connection capability.
2Reliability
If the locker is restricted until the male end form is fully inserted, then accidental engagement is prevented, but the connection process becomes more complex and time-consuming
Solution Approach 1:
The plunger is biased by a spring and automatically moves in response to the insertion of the male end form. The user simply needs to insert the male end form; the plunger self-adjusts its position to either block or clear the locker's path. This self-service mechanism avoids complex control systems while ensuring reliable locking, reducing device complexity compared to manually controlled or electronically controlled locking mechanisms.
Solution Approach 2:
The plunger transitions dynamically between two states: blocked (when the male end form is not fully inserted) and cleared (when it is). This dynamic behavior allows the system to adapt automatically to the insertion state without requiring complex control logic. The spring-loaded plunger provides a simple yet effective dynamic restriction mechanism that enhances reliability without significantly increasing complexity.
3Reliability
If the plunger remains biased against the bead after locking, then the connection remains secure under vibration, but the disengagement process becomes more difficult
Solution Approach 1:
The plunger applies a preliminary counter-force against the bead to prevent any movement or vibration from compromising the connection. This anti-action ensures that even under vibration, the connection remains stable. For disengagement, the user applies sufficient force to overcome this biasing spring, which then allows the plunger to move away and the locker to release. The preliminary anti-action provides stability without making disengagement excessively difficult.
Solution Approach 2:
The biasing spring is pre-loaded to maintain constant contact between the plunger and the bead, ensuring continuous stability. This preliminary action of pre-loading the spring creates a reliable connection that resists vibration. For disengagement, the user simply needs to apply force greater than the spring's biasing force, which is a simple and intuitive action that does not significantly complicate the disengagement process.
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 reliable locking and sealing of the male end form, preventing accidental locker engagement and maintaining the connection even under vibration, while allowing for safe and deliberate disengagement, enhancing safety and usability in applications like automotive fuel lines.
Implementation Method 1
A quick connector assembly featuring a plunger biased by a spring
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A quick connector assembly for quickly connecting and establishing fluid communication between a male end form having a bead and a hose or any other type of tube. The quick connector assembly includes a housing having a stem portion for receiving the hose and a female receiving portion for receiving the male end form. A plunger is disposed within the housing, and the plunger is biased in a first direction by a spring. The quick connector further includes a locker which is held in a non-engaged position until the male end form has been inserted into the housing until the bead moves the plunger in a second direction opposite of the first direction. Once the bead of the male end form clears the locker, the locker can be moved into an engaged position with the bead of the male end form being trapped between the locker and the plunger.