Series Joint Control Handle for Simpler Minimally Invasive Instruments
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Solution Overview
Problem
Common minimally invasive surgical instruments have complex structures and high production costs, making them inconvenient to use and promote.
Innovation Solution
An attachment assembly with a fixing member and an attachment member that allows for a rolling connection, a control handle with a thumbwheel structure for wire transfer, and a series motion mechanism with perpendicular joints to convert motion states, along with a connection assembly for the main and execution assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common minimally invasive surgical instrument structure is used, then the instrument can perform surgical operations, but the structure becomes too complex and production cost becomes expensive
Solution Approach 1:
The patent integrates the control assembly and execution assembly into a single unified instrument body, eliminating the need for separate connecting rods and wires. The control assembly includes control levers that directly control the execution assembly through internal mechanical linkages, merging multiple functional components into one integrated device that reduces both structural complexity and manufacturing cost
Solution Approach 2:
The instrument design allows the same basic structure to perform multiple surgical functions through different execution assemblies (cutting, clamping, suturing, pulling, and dissociating tools). The universal control mechanism can operate various execution assemblies, reducing the need for multiple specialized instruments and simplifying the overall system architecture
2Ease of operation
If a common minimally invasive surgical instrument structure is used, then the instrument can perform surgical operations, but the structure becomes too complex making it inconvenient to use and promote
Solution Approach 1:
The control assembly is divided into multiple independent control levers, each controlling a specific function of the execution assembly. This segmentation allows the surgeon to control different surgical functions independently through separate levers, simplifying the operation interface and making the instrument easier to use despite the integrated internal structure
Solution Approach 2:
By merging the control and execution functions into a single integrated instrument body with direct mechanical linkages, the patent eliminates the complexity of external wires and separate control mechanisms. The unified structure reduces the number of components the surgeon must manage, improving ease of 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
Facilitates a simpler, more ergonomic, and cost-effective minimally invasive surgical instrument with improved usability and reduced complexity.
Implementation Method 1
an attachment member, the attachment member being in a shape of a ring, an outer side of the attachment member having a second surface in a shape of a spherical ring... the attachment member being capable of rolling freely relative to the fixing member
Data Source
AI summary
Disclosed are a series motion mechanism and a minimally invasive surgical instrument. The series motion mechanism includes an attachment assembly attached to a wrist, a control handle, and a series joint including two joints. Rotation axes of the two joints are perpendicular to each other, the control handle and the attachment assembly are connected by the series joint to resolve a motion state of the control handle and convert the motion state into joint motions of the series joint.