Reciprocating Filament Moving System for 3D Drawing
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Solution Overview
Problem
Conventional 3D printing pens face challenges in designing a simple structure for continuous and reliable filament transportation, leading to complex operations during filament loading and unloading.
Innovation Solution
A handheld 3D drawing arrangement with a reciprocating filament moving system that uses a filament moving element to urge the filament forward through frictional contact, allowing for continuous feeding and simplified loading and unloading processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional gears or screws are used to drive the filament forward, then the filament can be transmitted continuously, but the structure becomes complex and the operation becomes complicated
Solution Approach 1:
The patent extracts the filament moving element from the complex gear or screw driving mechanism, using a simple reciprocating linear movement structure instead. The filament moving element moves back and forth in a straight line along the feeding pathway, eliminating the need for complex rotating gear groups or screw driving arrangements while maintaining continuous filament transmission capability.
Solution Approach 2:
Instead of using rotating motion (gears or screws) to drive the filament forward, the patent inverts the approach by using linear reciprocating motion. The filament moving element moves forward to push the filament, then reverses direction to return to the starting position, creating a simple back-and-forth driving mechanism that replaces complex rotational systems.
2Reliability
If gears or screws are used to engage with the filament, then the filament can be driven forward, but the loading and unloading operations become time-consuming and complicated
Solution Approach 1:
The patent removes the filament moving element from engagement with the filament during loading and unloading operations. The filament can be directly inserted into or removed from the feeding pathway without needing to disengage from gears or screws, eliminating the time-consuming reversing operation required in conventional systems.
Solution Approach 2:
The filament moving element is positioned to engage with the filament only when needed for forward transmission. During loading, the filament is inserted directly into the feeding pathway before the moving element engages it. During unloading, the moving element is separated in advance, allowing the filament to be quickly removed without waiting for reversal of complex driving mechanisms.
3Reliability
If a complex rotating gear group or screw driving arrangement is used, then the filament can be transmitted reliably, but the device structure becomes complicated
Solution Approach 1:
The patent extracts the essential function of filament transmission from the complex rotating gear group or screw driving arrangement, retaining only the necessary forward-pushing action. The filament moving element performs a simple reciprocating linear movement, eliminating unnecessary rotational components while maintaining reliable filament transmission capability.
Solution Approach 2:
The filament transmission function is segmented into discrete forward and backward movements of the filament moving element. Each forward stroke transmits the filament a specific distance, and each backward stroke returns the element to its starting position. This segmentation simplifies the continuous transmission process into manageable discrete actions, improving operational simplicity.
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 solution enables continuous and reliable filament transportation, simplifies the loading and unloading processes, and allows for a wider tolerance in filament diameter, reducing contamination and operational complexity.
Implementation Method 1
the reciprocating filament moving system is constructed to produce a frictional pushing force when the filament moving element larger than a frictional force when the filament moving element is moving backward to reset its position
Data Source
AI summary
A handheld 3D drawing arrangement includes a main body having a feeding pathway, a reciprocating filament moving system including a filament moving element, a heating system, and a controller, wherein under control of the controller, the reciprocating filament moving system is operated to allow the filament moving element to reciprocating move, so as to drive the filament to be feed to the heating system through the feeding pathway, so that the filament is heated and melted by the heating system for drawing the 3D object.