Marker Rotation Retention Device with Angular Stops
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Solution Overview
Problem
Markers and their caps tend to get lost or misplaced after being removed from their packaging, making it difficult to keep them organized and easily accessible.
Innovation Solution
A marker rotation and retention device that uses splined connections or ball detents to maintain multiple markers together, allowing for easy selection and replacement of specific markers by locking their angular position relative to each other.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If markers are removed from packaging for easy access, then ease of operation is improved, but markers and caps become prone to loss and misplacement
Solution Approach 1:
The device combines multiple markers with a common cap holder into a single integrated unit. The cap holder serves as a central structure that retains multiple caps simultaneously, preventing them from becoming separated or lost. This merging approach maintains ease of access while solving the retention problem.
Solution Approach 2:
The design implements a nested structure where caps are retained on a central holder, and markers can be inserted into or removed from the holder while caps remain in place. This nesting allows markers to be accessed individually without losing their associated caps.
2Reliability
If multiple markers are kept together in a set, then marker retention is improved, but ease of selecting and returning a specific marker deteriorates
Solution Approach 1:
The device segments markers into individual slots or positions on the cap holder, allowing each marker to be accessed independently. This segmentation maintains the set integrity while enabling easy selection and return of specific markers without having to handle the entire set.
Solution Approach 2:
The cap holder is designed to be rotatable or movable, allowing users to dynamically reposition markers or rotate the holder to bring desired markers into accessible positions. This dynamic capability improves ease of selection while maintaining retention.
3Reliability
If caps are retained on a central holder, then marker retention is improved, but device complexity increases
Solution Approach 1:
The cap holder employs simple retention features such as friction fits, snap clips, or basic mechanical interlocks at local contact points between caps and the holder. These localized simple mechanisms provide effective retention without requiring a complex overall structure.
Solution Approach 2:
The holder design allows caps to self-retain through their own structural features (e.g., cap ribs engaging with holder grooves, or elastic cap materials deforming to lock in place). This self-service approach reduces the need for additional complex retention mechanisms.
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 device effectively keeps markers organized and easy to use by preventing caps from sliding off and ensuring the cap is always exposed for easy access, reducing the likelihood of loss and misplacement.
Implementation Method 1
The use of resilient and/or flexible materials allows the teeth of the splines to snap past each other during rotation, and then locking into place to hold a particular angular position
Implementation Method 2
the spline interface is replaced with balls that lock into detents creating the same angular holding position action
Data Source
AI summary
The marker rotation and retention device maintains multiple markers together, making it easier for a user to maintain the markers as a set. Optionally, the marker rotation and retention device includes angular rotation stops that are able to hold the angular position of specific marker with respect to its neighbors. This allows the user to easily withdraw and replace a specific marker by keeping the entrance to the cap exposed.