Snap-On Fluid Connector Retainer for Low-Force Assembly
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Solution Overview
Problem
Current fluid connectors require high insertion force and post-process machining, making assembly difficult and prone to errors, and often necessitate tools, while retaining clips are easily lost due to their small size.
Innovation Solution
A two-piece snap-on retainer made of polymer that securely connects a tube to a connector body without tools, using a groove interaction to facilitate quick assembly and tamper resistance, eliminating the need for post-process machining and reducing insertion force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a retaining clip is used to secure the tube to the connector body, then the tube can be held in place, but the insertion force required to overcome the radial force of the retaining clip is very large
Solution Approach 1:
The retainer is divided into two separate sections (first section and second section) that can be assembled independently. Each section has its own flange that engages with the groove, distributing the securing force and reducing the peak insertion force required compared to a single-piece retaining clip
Solution Approach 2:
The retainer sections are designed to flex and deform during assembly, allowing them to snap into place behind the groove. This dynamic behavior enables the retainer to accommodate the tube insertion while maintaining holding force, reducing the required insertion force
2Reliability
If slots or apertures are machined in the connector body for the retaining clip, then the retaining clip can engage the tube, but extra post-process manufacturing is required
Solution Approach 1:
The groove is formed as an integral feature of the connector body during the primary manufacturing process, eliminating the need for post-process machining of slots or apertures. The groove is prepared in advance to receive the retainer sections, ensuring reliable engagement without additional manufacturing steps
Solution Approach 2:
The groove serves multiple functions: it provides the engagement feature for the retainer sections, acts as a locating feature during assembly, and eliminates the need for separate slots or apertures. This multi-functionality simplifies the manufacturing process while maintaining engagement reliability
3Reliability
If a retaining clip is used, then the tube can be secured to the connector body, but the retaining clip is very thin and small making it easy to lose if dropped or misplaced
Solution Approach 1:
The retainer is divided into two larger sections instead of one thin, small clip. Each section is substantial in size with flanges that are easy to grasp and manipulate, reducing the risk of loss while maintaining the securing function through the combined action of both sections
Solution Approach 2:
The two retainer sections are designed to work together as a unified assembly, with each section contributing to the securing function. The combined structure provides the necessary holding force while each individual section is large enough to be easily handled and unlikely to be lost
4Reliability
If traditional fluid connectors are used, then fluid can travel between components, but the assembly process takes a long time and requires tools
Solution Approach 1:
The retainer sections are designed to flex during assembly and snap into place behind the groove without requiring tools. This dynamic behavior allows for quick, tool-free assembly while maintaining the structural integrity and fluid connection reliability of the assembled joint
Solution Approach 2:
The retainer sections are designed to self-align and self-secure during assembly by snapping into the groove without requiring external tools or complex alignment procedures. This self-service capability accelerates the assembly process while ensuring reliable fluid connection integrity
Data Source
AI summary
A fluid connection assembly, including a connector body, including a first end, a second end, a first through-bore, and a first radially outward facing surface comprising a first groove, and a retainer removably connected to the connector body, the retainer including a first section, including a third end engaged with the first groove, a fourth end, a first flange arranged between the third end and the fourth end, a first male connector, and a first female connector, and a second section, including a fifth end engaged with the first groove, a sixth end, a second flange arranged between the fifth end and the sixth end, a second male connector arranged to engage with the first female connector, and a second female connector arranged to engage with the first male connector, wherein, in a locked state the first flange and the second flange abut against the second end.