Medical Motor Handpiece Angle Adjustment Ring Design
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Solution Overview
Problem
Existing medical hand instruments lack intuitive and efficient mechanisms for angular positioning of distal shafts, often requiring complex latching systems that are difficult to assemble and maintain, and may require replacement of entire components when latching elements wear out.
Innovation Solution
A medical motor handpiece with a rotationally fixed angle adjusting ring at its distal end, featuring an indicator sleeve with angle markings and a separate locking ring that can be easily replaced, allowing for intuitive operation and simplified maintenance by locking the control element into predefined angular positions with increased rotational resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex latching system is used to lock the operating element at predefined angular positions, then the reliability of angular positioning is improved, but the device complexity and difficulty of assembly/maintenance increase
Solution Approach 1:
The latching system is segmented into modular components: an angle adjusting ring with predefined angular positions, a separate locking ring with locking elements, and an operating element with complementary locking protrusions. This segmentation allows independent replacement of wear-prone locking elements without replacing the entire positioning mechanism, reducing device complexity while maintaining reliability.
Solution Approach 2:
The locking elements on the locking ring are designed as replaceable, cost-effective components that can be easily replaced when worn. This approach treats the locking elements as short-living parts that are replaced rather than repaired, reducing maintenance complexity and cost while ensuring reliable angular positioning continues to function.
2Reliability
If the entire locking system is replaced when latching elements wear out, then reliability is maintained, but the loss of time and cost increase
Solution Approach 1:
The locking system is divided into a stationary angle adjusting ring and a separate locking ring with replaceable locking elements. This segmentation enables selective replacement of only the worn locking elements rather than the entire locking system, significantly reducing replacement time and cost while maintaining the reliability of the angular positioning function.
Solution Approach 2:
The design allows individual locking elements to be discarded and replaced independently when worn, while the main locking ring and angle adjusting ring are recovered and reused. This selective replacement strategy minimizes waste and reduces the time and cost associated with full system replacement.
3Device complexity
If the angle adjusting ring is integrated into the handle portion, then the device complexity is reduced, but the ease of operation for angular adjustment is worsened
Solution Approach 1:
The angle adjusting ring is segmented as a separate, distally positioned component rather than being integrated into the handle portion. This segmentation provides better accessibility for the user to rotate and adjust angular positions, improving ease of operation while maintaining acceptable device complexity through modular design.
Solution Approach 2:
The angle adjusting ring is positioned at the distal end of the handle portion, utilizing the longitudinal dimension of the handpiece. This spatial arrangement improves user access and ergonomics for angular adjustment operations without significantly increasing overall device complexity.
Data Source
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AI summary
The disclosure relates to a medical motor handpiece (2) for driving a distal end effector (8, 22), comprising a handle section (4), a preferably sleeve-shaped control element (12) rotatably mounted about a longitudinal axis of the handle on a distal end section of the handle section (4), and coupling to the end effector (8, 22) in such a way as to transform a rotational movement of the control element (12) in a first direction of rotation into a movement of the end effector (8, 22) or to effect a function on the end effector (8, 22). An angle-adjusting ring (112) is arranged non-rotatably at a distal end of the medical motor handpiece (2) and is designed and configured to lock angular positions of the control element (12). The disclosure further relates to a medical hand instrument with a medical motor handpiece (2) according to the invention.