Pen Injection Dose Window Cover for Accurate Reading
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Solution Overview
Problem
Users of current pen-type injection devices may misread set dose values due to the design of the dose set window, which can lead to incorrect medication administration.
Innovation Solution
The injection device incorporates a dose set window with a cover or filter, such as a magnifying cover, polarized filter, or color filter, that, in combination with indicators on the dose set knob, provides a clear representation of the set dose only when viewed through the window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the dose set knob is designed with numerals visible through the dose set window, then the user can read the dose value, but the user may misread the dose value when viewing from outside the window
Solution Approach 1:
The patent applies local quality by making the dose indicator visible only through the specific location of the dose set window. The window cover with its specific pattern allows the dose indicator to be legible only when viewed through the window, while appearing unclear or meaningless when viewed from other locations. This localized visibility property prevents misreading while maintaining dose setting functionality.
Solution Approach 2:
The dose set window acts as an intermediary element between the dose indicator and the user's eye. The window cover with its specific pattern serves as a mediator that controls the visibility of the dose indicator, allowing it to be read correctly only when viewed through the window while preventing incorrect readings from external viewpoints.
2Measurement precision
If the dose set window cover is made transparent for visibility, then the dose indicator is legible, but the window may not provide sufficient protection or structural integrity
Solution Approach 1:
The patent utilizes optical properties (analogous to color changes principle) by employing a window cover with a specific pattern that modifies the appearance of the dose indicator. The window cover pattern creates a visual effect where the dose indicator appears legible only when viewed through the window, while maintaining the structural integrity and protective function of the window cover.
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 ensures that the set dose is legible only through the window, preventing misreading and ensuring accurate dose administration.
Implementation Method 1
a magnifying cover, which magnifies an indicator or printed number positioned in the dose set window
Implementation Method 2
a polarized filter configured to show the dose unit to the user only through the polarized filter
Implementation Method 3
a color filter configured to show the dose unit to the user only through the color filter
Data Source
AI summary
A medication injection device and method of setting a desired dose of medication are provided, where the device includes a housing having an opening or a window therein, and a dose set knob is disposed at least partially within the housing. The dose set knob is movable with respect to the housing to set a desired dose of medication and has represented thereon one or more dose value indicators. The opening or window in the housing and the dose value indicators on the dose set knob are configured such that, when moving the dose set knob with respect to the housing to set or select the desired dose, the dose value representative of the selected dose is legible when viewed through the opening or window, but otherwise is not clearly legible.