3D Drawing Pen Finger Detection Control
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Solution Overview
Problem
Conventional 3D drawing pens face issues such as shaking during operation due to the need for continuous button pressing, mechanical button damage, compromised waterproofing, limited nozzle configurations, and cumbersome assembly, which affect user control and versatility.
Innovation Solution
A 3D drawing arrangement featuring a finger detector-controlled filament moving system without external buttons, allowing for precise control and easy assembly, with a detachable sleeve for various sizes and designs, and a waterproof design that prevents water from reaching the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mechanical buttons are provided on the outer surface of the housing for controlling the motor, then the device is easy to operate, but the device shakes during operation and the buttons are prone to damage
Solution Approach 1:
The patent replaces mechanical buttons with a touch-sensitive control system. The housing surface includes a touch sensor that detects finger contact to control motor operation, eliminating the need for physical buttons. This substitution removes the mechanical components that caused shaking and damage while maintaining ease of operation through touch-based control.
2Ease of operation
If gaps are formed between the housing and buttons to allow button movement, then the buttons can function properly, but water proof performance is compromised
Solution Approach 1:
The patent eliminates mechanical buttons and their associated gaps by implementing a touch-sensitive control system embedded in the housing surface. The touch sensor detects finger contact through capacitive or resistive sensing without requiring physical button movement, thereby maintaining continuous waterproof sealing while preserving full button functionality.
3Stability of the object's composition
If the housing is designed as a fixed component to support the motor and gear train, then the structure is stable, but the housing cannot be replaced or customized
Solution Approach 1:
The patent divides the housing into modular components: a fixed internal structure that provides structural stability for the motor and gear train, and a replaceable outer housing shell that can be customized or exchanged. The outer shell is detachably coupled to the internal structure, allowing different designs, sizes, or materials to be used while maintaining the stable core support structure.
4Device complexity
If the nozzle assembly is fixed to the housing, then the structure is simple, but the exit nozzle configuration cannot be changed
Solution Approach 1:
The patent segments the nozzle assembly into a fixed mounting interface on the housing and a detachable nozzle component. The nozzle can be removed and replaced with different configurations while maintaining a simple fixed mounting structure. This allows users to change nozzle shapes or sizes without modifying the housing or motor assembly.
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 precise control of melted material flow, prevents device shaking, enhances aesthetic appeal, and allows for easy assembly and customization, while maintaining waterproof performance.
Implementation Method 1
a heating element 6... the heating element 6 is able to melt the feed stock 8 to provide a melted material
Implementation Method 2
a finger detector 32 electrically connected to the control circuit 31... when the finger detector 32 detects a presence of a finger of a user above the finger detector 32
Data Source
AI summary
A 3D drawing arrangement includes a feeding passage, a heater, a filament moving system, and a controller which includes a control circuit and a finger detector electrically connected to the control circuit, wherein when the finger detector detects a presence of a finger of a user which is aligned with the finger detector, the control circuit starts operation of the filament moving system to feed a filament to the heater along the feeding passage, so that the filament is heated and melted by the heater to produce the melted material flow.