Surgical Microscope Counterweight Balancing for Accessory Stability
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Solution Overview
Problem
Existing surgical microscopes suffer from balance issues due to misalignment of the center of gravity, leading to unwanted rotation and complicating surgical operations, and existing solutions like calibration, micrometric slides, and compensation systems are cumbersome, expensive, and hinder operation efficiency.
Innovation Solution
A balancing device with a support and counterweight system that adjusts the center of gravity by allowing the counterweight to be easily maneuvered and locked into position, maintaining balance during operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If calibration is performed at the end of production to balance the microscope, then the initial balance is achieved, but additional accessories cannot be installed without altering mass distribution and causing rotation
Solution Approach 1:
The patent introduces a counterweight system with adjustable mass distribution that compensates for the moment generated by the optical body's center of gravity. The counterweight can be repositioned along the articulated arm to maintain balance even when accessories are added, resolving the contradiction between initial balance stability and future adaptability for accessory installation.
Solution Approach 2:
The balancing system is designed to be dynamically adjustable during the operational phase. The counterweight position can be modified in real-time to accommodate different accessory configurations, transforming a static balance solution into a dynamic one that adapts to changing mass distributions.
2Reliability
If Cartesian micrometric slides with adjustment knobs are equipped on the optical body, then the center of gravity position can be varied to cancel the acting moment, but the operation execution is delayed and the risk of making mistakes increases
Solution Approach 1:
Instead of using complex micrometric slides, the patent employs a counterweight mechanism that provides more intuitive and faster adjustment. The counterweight can be manually repositioned along the articulated arm to generate the necessary counter-moment, significantly reducing adjustment time and minimizing the risk of operational errors while maintaining reliable moment cancellation.
3Reliability
If compensation systems such as springs or elastic means are installed to oppose the moment generated on the centre of gravity, then the moment is compensated, but encumbrance is caused and the system becomes expensive and complicated to design and install
Solution Approach 1:
The patent replaces complex elastic compensation systems with a mechanical counterweight approach using adjustable masses on the articulated arm. This solution achieves moment compensation through simple gravitational force balance rather than elastic deformation, dramatically reducing structural complexity, installation difficulty, and cost while maintaining effective moment opposition.
Solution Approach 2:
The patent substitutes elastic/mechanical spring systems with a gravitational counterweight mechanism. By using the gravity force of an adjustable counterweight instead of elastic restoration forces, the system achieves the same moment compensation function with simpler mechanics and fewer components.
4Reliability
If compensation systems are installed to oppose the moment, then balance is maintained, but ease of use and manoeuvrability deteriorate
Solution Approach 1:
The counterweight system is integrated into the articulated arm structure that the surgeon already manipulates during operation. The counterweight can be quickly repositioned along the arm without requiring separate adjustment mechanisms, maintaining balance while preserving full manoeuvrability and ease of use during surgical procedures.
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 seamless operation without continuous adjustments, enhancing maneuverability and reducing the risk of errors by maintaining balance throughout surgical procedures.
Implementation Method 1
Since the direction of the resulting force acting on the centre of gravity of the optical body is normally never aligned with the connection point to the frame, a moment is consequently created which induces an unwanted rotation of the optical body itself
Data Source
AI summary
A surgical microscope having an optical body connected to a holder by a hinge, and a balancing device. The device includes a counterweight, connected in at least one connection point to the optical body of the surgical microscope through a support which allows the free rotation of the counterweight around the connection point so as to balance the weight distribution of the optical body (with respect to the hinge and prevent unwanted rotations of the optical body.