Adaptor Slot and Screw Lock for Medical Handpiece
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Solution Overview
Problem
There is a need for a coupling assembly that can efficiently and conveniently detachably connect a high-speed motor with a working member for nasal operations, such as drilling or abrading bone and tissue, to facilitate precise and effective surgical procedures.
Innovation Solution
A medical device comprising a handpiece, a working member with a drive shaft, an adaptor with a slot and screw arrangement, and an extension tube that adjustably locks along the drive shaft, along with a locking ring that secures the drive shaft to the handpiece, allowing for secure and adjustable assembly and disassembly during operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detachable coupling assembly is used to connect the high-speed motor with the working member, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The coupling assembly is divided into distinct modular components including a locking ring, adaptor, extension tube, and working member with drive shaft. Each component can be independently assembled and disassembled, enabling easy tool changes while maintaining a relatively simple overall structure through standardized interfaces.
Solution Approach 2:
The extension tube is partially received inside the adaptor, and the adaptor is connectable to the handpiece, creating a nested arrangement. This nesting reduces the overall footprint and simplifies the coupling mechanism by eliminating the need for separate mounting structures for each component.
2Reliability
If an adjustable locking mechanism is used to secure the working member, then reliability is improved, but device complexity increases
Solution Approach 1:
The slot and screw arrangement is pre-configured in the adaptor to receive and secure the extension tube at predetermined positions. This preliminary arrangement of locking features eliminates the need for complex adjustment mechanisms during operation, ensuring reliable securing while maintaining simple device architecture.
Solution Approach 2:
The locking ring acts as an intermediary component that mediates between the handpiece and the working member assembly. It provides a simple rotational locking action that secures the entire assembly reliably without requiring complex multi-step locking mechanisms.
3Manufacturing precision
If a secure connection is provided to minimize chattering during drilling or abrading, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The locking ring, adaptor, and extension tube work together as an integrated securing system that combines rotational locking with positional adjustment. This merged approach provides secure connection to minimize chattering during drilling or abrading operations while maintaining relatively simple individual component designs.
Data Source
AI summary
Provided is a medical device comprising an adaptor having a slot and screw arrangement, the adaptor configured to be connectable to a handpiece; and an extension tube configured to be partially received within the adaptor, the extension tube configured to receive a drive shaft of a working member, wherein the slot and screw arrangement of the adaptor is configured to adjustably lock the extension tube along the drive shaft of the working member. The medical device further comprises a locking ring having one or more slots, the locking ring configured to receive a portion of a handpiece, wherein the one or more slots of the locking ring is configured to work together with a locking pin to lock and secure the drive shaft of the working member.