Intraocular Surgery Instrument Holder with Segmented Movement Control
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Solution Overview
Problem
Intraocular surgery instrument holders lack sufficient differentiation between coarse and fine movement ranges, risking eye damage due to malfunction during fine movements.
Innovation Solution
An intraocular surgery instrument holder with a translational driving unit for fine movements and a passive arm unit for coarse movements, featuring a brake mechanism to restrict arm movement during fine operations, ensuring separate and safe movement ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single link mechanism is used for both coarse and fine movements, then the device structure is simple, but the risk of eye damage increases due to uncontrolled large movements during fine operation
Solution Approach 1:
The patent divides the movement mechanism into two separate segments: a link mechanism for coarse movements and a robotic mechanism for fine movements. This segmentation allows each mechanism to have optimized movement ranges, preventing the large movements that could damage the eye during fine operation while maintaining overall structural functionality.
Solution Approach 2:
The patent introduces a brake mechanism as an intermediary device that controls and limits the movement range of the link mechanism. This brake mechanism acts as a mediator between the coarse movement capability and the fine operation safety, ensuring that the link mechanism cannot produce harmful large movements when the robotic mechanism is performing precise fine adjustments.
2Adaptability or versatility
If the movable range is large for positioning flexibility, then the positioning capability is improved, but the safety during fine movement deteriorates due to potential malfunction causing large movements
Solution Approach 1:
The patent segments the positioning system into two distinct mechanisms with different movable ranges: the link mechanism provides large movable range for initial positioning flexibility, while the robotic mechanism provides small precise movable range for safe fine movements. This segmentation allows both large adaptability and high reliability to coexist.
Solution Approach 2:
The patent applies different quality characteristics to different parts of the positioning system. The link mechanism is designed with large movable range characteristics for coarse positioning, while the robotic mechanism is designed with small precise movement characteristics for fine adjustments. The brake mechanism locally restricts the link mechanism's movement to prevent harmful actions during fine operation.
3Measurement precision
If automatic movement is implemented for fine adjustments, then the operation precision is improved, but the risk of malfunction causing large movements increases
Solution Approach 1:
The patent separates automatic control into the robotic mechanism only, which has inherently limited small movement range. The link mechanism with large movement range operates manually or remains braked. This segmentation ensures that automatic movement can only produce small precise adjustments, eliminating the risk that automatic malfunction could cause large harmful movements.
Solution Approach 2:
The brake mechanism serves as a safety intermediary that physically prevents the link mechanism from moving during automatic fine adjustment operations. Even if the robotic mechanism malfunctions, the brake ensures that the link mechanism cannot produce large movements that would damage the eye, thereby protecting against the harmful effects of potential malfunctions.
Data Source
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AI summary
An intraocular surgery instrument holder (1) is provided which may lower risks of damaging an eyeball by an intraocular surgery instrument due to malfunction as much as possible. The intraocular surgery instrument holder (1) includes a translational driving unit (2) as a driving mechanism configured to be capable of movement with multiple degrees of freedom, an arm unit (3) as a passive motion mechanism coupled with the translational driving unit (2) and configured to be capable of movement with multiple degrees of freedom, and a surgical instrument holding unit (4) as a passive gimbal mechanism coupled with one end of the arm unit (3), and configured to hold an intraocular surgery instrument, and to be capable of movement with a degree of rotational freedom with an opening part of a hole in an eyeball for insertion of the intraocular surgery instrument being a fixed point. A brake mechanism for inhibiting movement of the arm unit (3) is provided to the arm unit (3).