Orthopedic Instrument Nesting Mechanism for Secure Provisional Fixation
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Solution Overview
Problem
Existing orthopedic medical device connection mechanisms are prone to inaccurate or loose fittings and complex designs that can fail under repeated impact, necessitating complex assembly and disassembly processes.
Innovation Solution
A connection mechanism featuring a first orthopedic medical device with a nesting outer surface and a movable non-rigid spacer, and a second device with a porous inner surface, allowing for quick, secure, and resilient assembly and disassembly through complementary geometric shapes and porous engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If single point engagement connection mechanisms are used, then quick connection and disconnection is achieved, but inaccurate or loose fittings occur
Solution Approach 1:
The connection interface is segmented into multiple engagement points (protrusions and recesses) distributed around the cylindrical interface, transforming a single-point engagement into multi-point engagement. This segmentation provides both quick connection and accurate fitting by distributing the engagement load across multiple points while maintaining a simple geometric interface.
2Reliability
If complex spring and pin mechanisms are used, then secure connection is achieved, but failure under repeated impact occurs
Solution Approach 1:
The complex spring and pin mechanisms are extracted and replaced with a simple geometric interlocking interface consisting of protrusions and recesses. This extraction eliminates the fragile components while maintaining secure connection through the geometric shapes that naturally interlock and distribute impact forces.
Solution Approach 2:
The connection interface combines geometric interlocking (protrusions and recesses) with frictional engagement through the porous coating layer. This composite approach creates a secure connection that withstands repeated impact without requiring complex mechanical components.
3Adaptability or versatility
If modular orthopedic medical devices are used, then versatility is improved, but assembly and disassembly complexity increases
Solution Approach 1:
The protrusion-recess connection interface is designed as a universal mechanism that can accommodate various modular orthopedic device components. The same geometric principle applies to different device types and sizes, providing versatility while maintaining simple, consistent assembly and disassembly procedures across the entire device family.
Data Source
AI summary
An orthopedic medical device connection mechanism comprising: a first medical device comprising: a first body having: a nesting outer surface, a spacer recess, the spacer recess extending into the first body and communicating with the nesting outer surface, and a movable spacer disposed within the spacer recess, the movable spacer having an internal end internally disposed from an external end, wherein the external end is adjacently disposed to the nesting outer surface; and a second medical device comprising: a second body configured to be nested with the first body, a porous inner surface internally disposed from a second body outer surface, wherein the porous inner surface defines a connector area, and wherein the nesting outer surface is configured to be disposed within the concave connector area adjacent to the porous inner surface in an assembled configuration.