Cap Structure With Rotatable Sleeve And Snap-Fit Projections
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing container caps require either rotational screwing, which is cumbersome, or linear snapping with significant force, making them difficult for users with limited mobility or those engaging in sports to easily attach and detach.
Innovation Solution
A cap structure with a rotatable sleeve and inwardly protruding projections that snap over an annular step, allowing for easy linear mounting and detachment with minimal rotational motion, facilitated by a spring mechanism for secure sealing and easy removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotational screwing motion is used to attach the cap, then the cap can be securely attached to the container, but the operation becomes cumbersome and difficult for users with limited mobility
Solution Approach 1:
The attachment mechanism is segmented into discrete components: a cap with protrusions, a container neck with recesses, and a rotating element with cam surfaces. This segmentation allows the complex attachment to be broken into simpler sequential motions - linear approach followed by minimal rotation to engage the cam surfaces, reducing operational complexity while maintaining secure attachment
Solution Approach 2:
The rotating element with cam surfaces introduces dynamics to the attachment system. As the cap is rotated slightly, the cam surfaces dynamically convert this small rotational motion into larger linear displacement of the protrusions into the recesses, achieving secure attachment with minimal user effort and rotation
2Ease of operation
If a linear snapping motion is used to attach the cap, then the operation is simpler, but significant force is required to attach and detach the cap
Solution Approach 1:
The rotating element with cam surfaces acts as an intermediary mechanism between the user's linear snapping motion and the final attachment. This intermediary converts the simple linear motion into the necessary rotational component to engage the cam surfaces, which then leverage mechanical advantage to achieve secure attachment with reduced force requirements
Solution Approach 2:
The cam surfaces change the mechanical parameters of the system during attachment. By rotating the cap slightly, the cam surfaces transform the force vector and mechanical advantage, allowing the attachment to engage with less force than a direct linear snap would require, while still achieving secure connection
3Ease of operation
If significant force is applied to detach the cap, then the cap can be removed from the container, but unintentional disengagement may occur
Solution Approach 1:
The detaching mechanism uses periodic action through the rotating element. By rotating the cap in the opposite direction, the cam surfaces periodically engage and disengage the protrusions from the recesses in a controlled manner. This periodic engagement provides feedback to the user and ensures intentional detachment, preventing accidental disengagement while maintaining ease of removal
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
Enables rapid and secure attachment and detachment of the cap without requiring extensive rotational motion, improving usability for users with limited mobility or those in motion, while maintaining a firm seal to prevent leakage.
Implementation Method 1
The sleeve may be coupled to a spring which may hold the sleeve in the default position and/or return the sleeve from the second, rotated position to the first, default position.
Data Source
AI summary
A cap structure may include a base and a cap, where the base may include a periphery configured to be mounted over a rim of an opening of a container. The base may include a hollow neck, extending from the base for facilitating flow of liquid from the container through and out of the neck. The neck may include a flange extending annularly around the neck, so as to define an annular step. The cap may include a plurality of inwardly protruding projections, configured to snap over the step when the cap is mounted over the neck.