Endoscope Dial Reversion Mechanism for Precise Bending Control
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Solution Overview
Problem
Conventional endoscopes face challenges in maintaining precise control over the bending angle of the insertion portion, particularly in the right/left direction, as existing mechanisms lack efficient mechanisms for automatic reversion to a predetermined bending state without continuous operator input.
Innovation Solution
The endoscope operation mechanism incorporates a first operation member with an initial state reversion mechanism and a second operation member that allows for switching between changing and resisting position changes, enabling the bending portion to revert to a predetermined angle automatically when the operator releases the control, using a potentiometer and cam mechanisms to manage the rotational force and frictional resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional operation mechanism is used without automatic reversion, then the structure is simpler, but the operator must continuously adjust the bending angle to maintain precision
Solution Approach 1:
The operation mechanism automatically reverts the bending portion to a predetermined bending state without continuous operator input. The reversion mechanism uses a spring-loaded cam system that automatically returns the operation member to its initial position when released, enabling the system to maintain precision without constant manual adjustment
Solution Approach 2:
The mechanism incorporates a detection means that detects the rotational angle of the operation member and provides feedback to control the bending state. This feedback loop allows the system to maintain precise bending angles by automatically adjusting the bending portion based on the detected position
2Ease of operation
If automatic reversion mechanism is added, then operator fatigue is reduced, but the device complexity increases
Solution Approach 1:
The reversion mechanism dynamically adjusts the bending state based on operational needs. The cam mechanism transforms rotational motion into linear motion to control the bending portion's position, and the spring-loaded system dynamically responds to operator input while automatically reverting when released
Solution Approach 2:
The operation mechanism nests multiple functional components within a compact structure. The detection means, reversion mechanism, and bending control components are integrated into a unified assembly that fits within the endoscope's operational portion, minimizing overall complexity while maintaining functionality
3Ease of operation
If the operation member allows free rotation, then ease of operation is improved, but the bending angle cannot be maintained without continuous input
Solution Approach 1:
The reversion mechanism operates in periodic cycles, automatically returning the operation member to its initial position when released. This periodic reversion action maintains bending angle stability by periodically resetting the position without requiring continuous operator input during the bending operation
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 configuration allows for precise control and automatic reversion of the bending angle, enhancing operational efficiency and reducing operator fatigue by enabling the bending portion to maintain a set angle without continuous manual adjustment.
Implementation Method 1
an initial state reversion mechanism configured to apply an urging force to the first operation member so as to return the first operation member to the initial state
Implementation Method 2
using a potentiometer and cam mechanisms to manage the rotational force and frictional resistance
Data Source
AI summary
An endoscope operation mechanism includes: a dial operating an endoscope function; a detection sensor that has a sensor rotation shaft to which rotation of a dial rotation shaft of the dial is transmitted and detects the rotation amount, and that outputs an electrical signal in accordance with the detected rotation amount to a control portion performing driving control of a driving source of the endoscope function; an initial position reversion mechanism applying a rotational force to the dial rotation shaft in an opposite direction to the direction in which the dial rotation shaft is rotated, to thereby cause the rotational position of the dial to return to an initial position; and a switching mechanism switchable between a first state in which a rotational force from the initial position reversion mechanism is applied to the dial rotation shaft, and a second state in which the rotational force is not applied.