Hand Controller Finger Sensing for Variable Hand Sizes
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Solution Overview
Problem
Existing systems fail to accurately detect an operator's fingers regardless of hand size, leading to inconsistent control of medical devices due to mismatched controller sizes.
Innovation Solution
A hand controller with a tab, handle, and finger sensor, along with a console device featuring a foot switch and articulated link structure, ensures finger detection and mode switching based on sensor input, allowing precise control regardless of hand size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the controller size is reduced for portability, then ease of operation is improved, but finger detection reliability deteriorates
Solution Approach 1:
The controller incorporates movable components including a handle that can move in and out of contact with the tab, and an operation lever that can move in and out of contact with the first side surface. These dynamic elements allow the controller to adapt to different hand sizes while maintaining consistent finger contact with the sensor, resolving the contradiction between portability and detection reliability
Solution Approach 2:
The controller design allows for parameter changes in the position and configuration of the handle and operation lever relative to the tab. By adjusting these parameters, the system can accommodate various hand dimensions while ensuring the finger sensor consistently detects the operator's finger, maintaining reliability across different user sizes
2Reliability
If the controller size is increased to accommodate large hands, then finger detection reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The movable handle and operation lever allow the controller to dynamically adjust its configuration. This enables the controller to maintain appropriate spacing for large hands while ensuring the finger sensor remains accessible and detectable, thus improving reliability without sacrificing ease of operation
Solution Approach 2:
The controller is divided into separable functional components: the tab containing the finger sensor, the movable handle, and the operation lever. This segmentation allows each component to be positioned independently to optimize for both large hand accommodation and finger detection reliability
3Manufacturing precision
If the finger sensor is positioned fixedly on the tab, then manufacturing precision is improved, but adaptability to different hand sizes deteriorates
Solution Approach 1:
The fixed finger sensor on the tab combines with movable handle and operation lever components to create a dynamic positioning system. The sensor remains fixed for manufacturing precision, while the movable components adjust the overall geometry to adapt to different hand sizes, resolving the contradiction between precision and adaptability
Solution Approach 2:
The controller design creates a universal interface where the fixed finger sensor works in conjunction with adjustable handle and lever components. This multi-functional arrangement allows the same sensor position to serve users of various hand sizes by compensating through the movable parts, achieving both manufacturing precision and broad adaptability
Data Source
AI summary
A hand controller includes a tab that has a first side surface and a second side surface facing away from the first side surface and an end surface that extends from the first side surface to the second side surface, a handle that faces the end surface of the tab and is mounted to the tab to allow the handle to be moved in and out of contact with the end surface of the tab, an operation lever that faces the first side surface of the tab and is coupled to the tab to allow the operation lever to be moved in and out of contact with the first side surface of the tab, and a finger sensor on the second side surface of the tab, the finger sensor detecting a finger of a hand of an operator.