Adjustable Angle Surgical Reamer Driver Pivot Mechanism
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Solution Overview
Problem
Existing orthopedic surgical reamers lack the ability to adjust the offset angle between the reaming axis and the drive axis, making it difficult to prepare bones for prosthetic implants when the implant requires a non-parallel application.
Innovation Solution
A surgical reaming device with a pivotably coupled drive housing that allows for adjustable offset angles between the reaming axis and the drive shaft axis, enabled by a linkage system and an angle adjustment control element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-axis reamer is used, then the structure is simple and easy to manufacture, but the reaming axis cannot be adjusted to match non-parallel implant requirements
Solution Approach 1:
The drive housing is made pivotable relative to the main housing, allowing the reaming axis to dynamically adjust its angle relative to the drive shaft axis. This dynamic configuration enables the device to adapt to different implant angle requirements while maintaining a relatively simple overall structure through controlled movement rather than multiple fixed components.
Solution Approach 2:
The device is divided into separable functional modules: a main housing containing the drive shaft, and a pivotable drive housing containing the reamer. This segmentation allows independent optimization of each module and simplifies manufacturing while enabling angle adjustment through their relative movement.
2Adaptability or versatility
If an adjustable angle mechanism is added to the reamer, then the versatility for different implant angles is improved, but the device complexity and number of components increases
Solution Approach 1:
The linkage system is designed to automatically maintain the selected angle relationship between the drive housing and main housing once the adjustment control element is positioned. The mechanical linkage self-regulates the pivot angle, eliminating the need for complex active control systems or continuous user intervention during operation.
3Manufacturing precision
If the drive housing is pivotably coupled to allow angle adjustment, then the reaming accuracy for non-parallel implants is improved, but the device structure becomes more complex
Solution Approach 1:
A linkage system acts as an intermediary mechanical element between the adjustment control and the pivotable drive housing. This linkage translates the adjustment control movement into precise angular positioning of the drive housing, ensuring accurate angle maintenance while keeping the overall mechanism relatively simple through direct mechanical coupling.
Data Source
AI summary
A device including a housing having a passage extending therethrough defining a drive shaft axis; a drive shaft supported within the passage and rotatable about the drive shaft axis; a drive housing defining a reaming axis and pivotably coupled to the housing to allow the reaming axis to deflect with respect to the drive shaft axis, a drive interface supported within the drive housing and rotatable about the reaming axis, the drive interface contacting the drive shaft such that rotation of the drive shaft about the drive shaft axis causes rotation of the drive interface about the reaming axis; and an angle adjustment control positioned remotely from a distal end of the housing and operably coupled to the drive housing to move the drive housing between a first position and a second position to define respective first and second offset angles between the reaming axis and the drive shaft axis.