Master-Slave Operation Input Device Scaling-Ratio Mechanism
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Solution Overview
Problem
Existing master-slave systems lack the ability to efficiently switch between fine and coarse movements of the slave device, such as an endoscope, due to limitations in the scaling ratio of the master input device, which affects the precision and speed of operations within body cavities.
Innovation Solution
Incorporating a scaling-ratio changing mechanism that adjusts the length of the lever in the master device, allowing the grip to move a greater or lesser distance for the same pivoting angle, thereby changing the operation input level and enabling fine or coarse movements of the endoscope by varying the scaling ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the scaling ratio of the master input device is fixed, then the structure is simple, but the operator cannot switch between fine and coarse movements of the slave device
Solution Approach 1:
The patent applies the dynamics principle by making the scaling ratio of the master input device adjustable rather than fixed. The lever length can be dynamically changed between a first length (for fine movement with higher scaling ratio) and a second length (for coarse movement with lower scaling ratio), allowing the system to adapt to different operational requirements while maintaining a relatively simple overall structure.
2Ease of operation
If the lever length is increased to increase grip movement distance, then coarse movement capability is improved, but fine movement precision is reduced
Solution Approach 1:
The patent resolves this contradiction by making the lever length dynamically adjustable. When fine movement precision is needed, the lever is set to the first (shorter) length, which provides higher scaling ratio and thus more precise control. When coarse movement is needed, the lever is extended to the second (longer) length, providing greater movement distance. This dynamic adjustment allows the system to optimize between ease of operation and measurement precision based on the specific operational context.
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 mechanism allows for efficient and precise control of the endoscope, enabling detailed observations and treatments by allowing the operator to switch between fine and coarse movements of the endoscope, enhancing operational efficiency and speed.
Implementation Method 1
a coupling portion that couples the grip to the base portion in a pivotable manner
Data Source
AI summary
Provided is an operation input device including a base member; a grip that is gripped by an operator and that is moved relative to the base member; a coupling portion that couples the grip to the base portion in a pivotable manner; and a scaling-ratio changing mechanism that changes an amount by which the grip is moved with respect to a pivoting angle of the coupling portion, and an object thereof is to enable switching operation between a coarse movement and a fine movement by using the same operation.