Multi Pencil Ratchet Mechanism for Soft Material Feed
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Solution Overview
Problem
Conventional multi-pencils with cosmetic material feed containers face issues in using soft materials due to backward movement of drawing materials, which complicates usability and requires rigid materials, and often result in unnecessary backward movement of drawing materials.
Innovation Solution
A multi-pencil design featuring a cylindrical main body and leading tube with a ratchet mechanism that allows forward movement of drawing materials by relative rotation, eliminating backward movement and enabling the use of soft materials by regulating forward thrust through a ratchet mechanism and screw-threaded engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the core chuck holds the drawing material and moves it backward in response to push rod movement, then the drawing material can be returned to initial position, but soft materials cannot be applied and usability deteriorates
Solution Approach 1:
The invention extracts and eliminates the core chuck component from the system. By removing the holding mechanism that gripped the drawing material, the patent allows soft materials to be used without being damaged by mechanical gripping, while still achieving the material return function through alternative means
Solution Approach 2:
The invention introduces a ratchet mechanism as an intermediary between the push rod and drawing material. This mediator allows unidirectional movement (forward thrust only) while permitting backward movement of the push rod without moving the drawing material, thus enabling soft material usage while maintaining control
2Reliability
If the drawing material is moved backward more than necessary, then the material can be reset, but additional forward movement is needed in next use reducing productivity
Solution Approach 1:
The invention adopts a disposable-like approach where the drawing material is designed to be used until depleted rather than fully reset. The ratchet mechanism allows the push rod to return without moving the material backward, eliminating the need for additional forward movement in subsequent uses and improving productivity
Solution Approach 2:
The ratchet mechanism enables continuous forward progression of the drawing material without interruption for resetting. Each rotation of the leading tube continues the forward movement, eliminating idle backward movement cycles and maintaining continuous useful action
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 the use of soft materials and improves usability by ensuring only forward movement of drawing materials, preventing unnecessary backward movement and enhancing the precision and ease of application.
Implementation Method 1
a ratchet mechanism that allows the relative rotation of the leading tube and the main body in the one direction and regulates the relative rotation of the leading tube and the main body in other direction
Implementation Method 2
regulating forward thrust through a ratchet mechanism and screw-threaded engagement
Data Source
AI summary
A multi pencil includes a cylindrical main body, a cylindrical leading tube engaged with the main body, and a plurality of sliding parts that are each coupled with a plurality of drawing materials held in the interior of the leading tube and slidably provided by a constant distance with respect to the main body. Regarding this configuration, one arbitrary sliding part, out of the plurality of sliding parts, moves forward by a constant distance with respect to the main body, whereby the drawing material coupled with the sliding part is exposed from the leading tube, and in this state, the leading tube and the main body are relatively rotated in one direction, which allows the drawing material to move forward. In the multi pencil, the forward movement of the drawing material is regulated by the relative rotation of the leading tube and the main body in the one direction.