Rotatable Knob Input Device for Ergonomic Image Navigation
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Solution Overview
Problem
Current input devices, such as mice and keyboards, are not ergonomically designed for repetitive manipulation of digital images, leading to user fatigue and increased risk of musculoskeletal disorders (MSD).
Innovation Solution
The development of an ergonomic input device featuring multiple rotatable control knobs that allow users to perform manipulations like panning and zooming with minimal strain on the forearm and wrist, distributing workload between both hands for improved navigation speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mice and keyboards are used for repetitive image manipulation, then basic input functions are maintained, but user fatigue increases and risk of musculoskeletal disorders rises
Solution Approach 1:
The input device is segmented into multiple independent rotatable control knobs, each dedicated to specific image manipulation tasks (panning, zooming). This segmentation allows each knob to be optimized for its specific function while distributing the operational workload across multiple control elements, reducing repetitive strain on any single body part.
Solution Approach 2:
The device transitions from two-dimensional keyboard/mouse interaction to three-dimensional spatial control through vertically stacked rotatable knobs. This dimensional change allows for more natural hand positioning and reduces wrist deviation, addressing the musculoskeletal disorder risk while maintaining operational efficiency.
2Productivity
If multiple rotatable control knobs are added to the device, then navigation functionality and speed are improved, but device complexity increases
Solution Approach 1:
Each rotatable control knob is designed to perform multiple functions through different rotational directions and combinations. For example, rotating knobs in different directions enables panning in multiple directions and zooming operations, allowing a single physical component to replace what would traditionally require multiple separate controls.
Solution Approach 2:
The device merges multiple image manipulation controls (panning, zooming, navigation) into a compact arrangement of rotatable knobs that can be operated simultaneously or independently. This consolidation achieves high navigation functionality while maintaining a relatively simple physical structure compared to traditional multi-device setups.
3Ease of operation
If workload is distributed between both hands using multiple knobs, then user fatigue is reduced, but learning curve and operational complexity increase
Solution Approach 1:
Each rotatable control knob is positioned and sized to match the natural reach and dexterity of specific fingers and hands. The local design of each knob optimizes for the specific hand it controls, making the distributed workload feel natural rather than complex, thereby reducing learning time despite the dual-hand operation requirement.
Data Source
AI summary
An input device allows a user to manipulate an image displayed by a user interface (UI) of a computer. The input device includes a housing, a first rotatable control knob supported by the housing, and a second rotatable control knob supported by the housing. The first and second rotatable control knobs allow the user to perform at least zooming and panning manipulations of the image on the UI. The input device can further include a third rotatable control knob and a touch pad. The input device can be configured as a keyboard.