Multi-Color Pen With Finger-Actuated Pumping Mechanism
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Solution Overview
Problem
Existing writing instruments that provide multiple colors, such as microfluidic pens, often require complex mechanisms and micro-computers for color actuation, increasing manufacturing costs and complexity.
Innovation Solution
A writing instrument with at least two reservoirs for different colors and a pumping mechanism actuated by a user's finger, eliminating the need for micro-computers or micro-chips, using self-actuated check valves and flexible membranes to manage ink flow and pressure, allowing for single-finger operation to select colors or mixtures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If micro-computers and micro-chips are used for actuating and controlling the operation of pumping means, then color selection and mixing can be precisely controlled, but device complexity and manufacturing costs increase
Solution Approach 1:
The pumping means are designed to be self-actuating through finger pressure applied to a flexible membrane, eliminating the need for micro-computers or micro-chips to control their operation. The system serves itself by converting direct user input into pumping action without requiring electronic control systems.
Solution Approach 2:
The patent extracts and removes the micro-computer and micro-chip components from the system entirely. By eliminating these electronic control elements, the invention simplifies the device while maintaining color selection capability through a purely mechanical interface.
2Ease of operation
If micro-computers and batteries are included for controlling pumping means, then precise color actuation is achieved, but manufacturing costs increase
Solution Approach 1:
The patent removes batteries and micro-electronic components from the system, extracting the costly elements that would otherwise be required for precise color actuation control. This extraction maintains functional precision through mechanical means while dramatically reducing manufacturing costs.
Solution Approach 2:
The invention replaces expensive, complex electronic control systems with simple, inexpensive mechanical components that can be manufactured at low cost. The flexible membrane and finger-actuated pumping mechanism represent a cost-effective alternative to electronic control systems.
3Ease of operation
If multiple pumping means are provided for each reservoir, then single-finger operation for color selection is enabled, but device complexity increases
Solution Approach 1:
The patent merges multiple pumping functions into a single integrated flexible membrane structure. By combining the actuation mechanism for multiple reservoirs into one unified membrane, the system enables single-finger operation while avoiding the complexity of multiple separate pumping mechanisms.
Solution Approach 2:
The flexible membrane serves multiple functions simultaneously: it acts as the actuating surface for color selection, the pumping mechanism for ink delivery, and the pressure transmission element for controlling multiple reservoirs. This multi-functionality reduces overall device complexity while maintaining ease of operation.
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
This design simplifies the writing instrument's mechanism, reduces manufacturing costs, and allows for efficient color selection and mixing without the need for batteries or micro-electronics, while maintaining the ability to produce a range of colors and mixtures.
Implementation Method 1
each pumping means may comprise a flexible membrane or element which can be pressed into the pumping chamber by a force or pressure exerted by the at least one finger. With that, each flexible membrane or element changes its shape from a first shape to a second shape when a force or pressure is exerted by the at least one finger
Implementation Method 2
The flexible membrane is more specifically designed to adopt its first shape after the force or pressure exerted by the at least one finger has been removed, thereby increasing or restoring the volume of the pumping chamber
Implementation Method 3
The at least one pumping means is more specifically designed to provide a pumping actuation by using a force or pressure exerted by the at least one finger
Data Source
AI summary
A writing instrument, in particular a pen, comprising at least two reservoirs for storing colorants or inks of at least two different colors, characterized by at least one pumping means which is designed to be actuated by at least one finger of a user.