Multiple-Head Bone Drill for Variable-Diameter Bores
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Solution Overview
Problem
Existing bone drilling tools are inadequate for creating bores with varying diameters required for procedures such as anchor insertion, drug administration, and implant placement in AVN treatment, as they often require multiple tools or complex systems.
Innovation Solution
A bone drilling tool with a shaft and multiple reaming heads positioned at varying distances, allowing for adjustable diameter changes using a single tool, featuring locking mechanisms to secure the heads and scale marks for precise depth control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single bone drilling tool is used to create bores with varying diameters, then the need for multiple tools is reduced and procedure efficiency is improved, but the device complexity increases due to multiple reaming heads and locking mechanisms
Solution Approach 1:
The drilling tool is segmented into multiple functional components: a shaft, multiple reaming heads with different diameters, and locking mechanisms. Each reaming head can be independently attached or detached to perform different drilling operations, allowing a single tool system to replace multiple dedicated tools while maintaining manageable complexity through modular design
Solution Approach 2:
The bone drilling tool is designed with multi-functionality by incorporating multiple reaming heads with varying diameters (e.g., 4mm, 5mm, 6mm) that can be interchangeably mounted on the shaft. This universal design enables the same tool to perform multiple drilling operations for different surgical requirements (anchor insertion, drug administration, graft implantation) without needing separate specialized tools
2Adaptability or versatility
If multiple reaming heads are positioned at varying distances on the shaft, then adjustable diameter changes are enabled for different surgical procedures, but the manufacturing complexity increases
Solution Approach 1:
The reaming heads are designed as separate, standardized segments that can be independently manufactured and then assembled onto the shaft at required positions. This segmentation allows each head to be produced using standard manufacturing processes, and the final assembly involves simple positioning and locking, reducing overall manufacturing complexity compared to creating a fully integrated multi-functional tool
Solution Approach 2:
The reaming heads are pre-positioned at specific distances along the shaft during assembly to correspond to predetermined depth markings. This preliminary positioning ensures that when a reaming head is attached, it automatically aligns with the correct depth indicator on the shaft, eliminating the need for complex adjustment mechanisms during surgical use and simplifying both manufacturing and operation
3Reliability
If locking mechanisms are added to secure reaming heads to the shaft, then operational reliability is improved, but the device complexity increases
Solution Approach 1:
The locking function is extracted as a separate, dedicated mechanism rather than being integrated into the reaming head structure itself. The locking mechanism operates independently to secure the reaming head to the shaft, allowing the reaming head design to remain simple and focused on its primary cutting function while the locking system provides the necessary reliability through a specialized attachment mechanism
4Measurement precision
If scale marks are added to the shaft for precise depth control, then measurement precision is improved, but the device complexity increases
Solution Approach 1:
The shaft itself serves as the measurement reference by incorporating scale marks directly into its structure. These marks provide self-service depth indication that is inherently integrated with the tool's operation, eliminating the need for separate measurement devices or complex electronic sensing systems. The scale marks work automatically with the reaming heads' positions to provide precise depth control
Data Source
Figure 1A~1C
Figure 1D~1E
Figure 1F~1G
AI summary
A drill device including a shaft having a proximal end and a distal end, one or more first reaming heads configured to be positioned along the shaft adjacent the distal end and one or more second reaming heads configured to be positioned along the shaft at a location axially proximally spaced from the first reaming head.