Medical Footswitch With Dynamic LED Function Indication
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Solution Overview
Problem
Conventional medical foot switches have limitations in displaying and distinguishing a large number of functions, with fixed color assignments and complex, expensive display implementations.
Innovation Solution
A foot switch with a multicolor LED that can generate various colors to indicate different functions, connected via an interface to a control unit that assigns functions dynamically, allowing for flexible and safe operation of medical devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate LEDs with different colors are used to display different functions, then the number of distinguishable functions increases, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple color-capable LEDs into a single multicolor LED component that can display different colors (red, green, yellow, blue, white) to indicate different functions. This merging approach maintains the ability to distinguish multiple functions while reducing the number of separate LED components needed, thereby simplifying the device structure and reducing complexity
Solution Approach 2:
The multicolor LED serves multiple functions by displaying different colors to indicate different operational states and functions of the medical device. A single LED component replaces what would traditionally require multiple separate LEDs, making the display system more versatile while reducing overall component count and device complexity
2Loss of information
If a display is provided on the foot switch to show text, then information display capability improves, but the device complexity and cost increase significantly
Solution Approach 1:
The patent uses color changes in the LED to convey functional information about the medical device. Different colors indicate different functions, modes, or operational states, providing effective information display without requiring a complex text-based display. This approach maintains good information communication while avoiding the high complexity and cost associated with text displays on foot switches
3Ease of manufacture
If fixed color assignments are used on foot switch pedals, then manufacturing simplicity is maintained, but adaptability to different functions is limited
Solution Approach 1:
The patent implements dynamic color assignment where the LED can change colors based on the assigned function, allowing the same physical pedal to be reassigned to different functions with different color indicators. This dynamic capability provides flexibility in function assignment while maintaining manufacturing simplicity, as the hardware remains the same but the functional configuration can be changed through software or control settings
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 differentiation of multiple functions with a single LED, enhancing user safety and flexibility by dynamically assigning colors to functions, reducing the need for separate switches and simplifying the user interface.
Implementation Method 1
an LED is arranged on the foot switch, for displaying the associated function in a certain color. Here, the LED is a multicolor LED, which can generate light in a multiplicity of different colors
Data Source
AI summary
A foot switch (1, 26) for use with a medical device (16, 27, 28) comprises an interface (10) for a communications link between the foot switch (1, 26) and a control unit (12) of the device (16, 27, 28) and comprises at least one pedal (2, 3) for operating the foot switch (1, 26) using a foot. An operation sensor (17) captures an operation of the foot switch (1, 26) for switching a function of the medical device (16, 27, 28). The control unit (12) assigns the function to the pedal (2, 3) via the interface (10) and the assigned function is displayed on the foot switch (1, 26) by a multicolor LED (4, 5).