Medical Shaver Detachable Suction Tube Coupling
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Solution Overview
Problem
Existing medical shavers attached to handpieces have integrally formed suction parts, making them inconvenient to attach and detach, which hinders efficient use during surgical procedures.
Innovation Solution
A medical shaver design featuring a detachable suction tube with a polygonal docking mechanism and ring-shaped coil springs that require a greater force for detachment than attachment, ensuring secure attachment and stable operation during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the suction parts are integrally formed, then the structure is simple and reliable, but it is inconvenient to attach and detach the parts
Solution Approach 1:
The suction tube is divided into a detachable coupling part and a main body, allowing the suction tube to be separated from the shaft. This segmentation enables convenient attachment and detachment operations while maintaining structural simplicity through modular design.
Solution Approach 2:
The coupling part is designed with dynamic attachment and detachment capabilities, allowing the suction tube to be easily connected and disconnected from the shaft during surgical procedures, transforming a static integral structure into a dynamic modular system.
2Ease of operation
If a detachable coupling mechanism is added, then ease of attachment and detachment is improved, but the risk of unintended detachment during rotation increases
Solution Approach 1:
The docking part features a polygonal cross-section that asymmetrically engages with a corresponding polygonal structure on the shaft. This asymmetric geometry prevents unintended detachment during rotation while maintaining easy attachment, as the polygonal shape naturally locks the components together.
Solution Approach 2:
The coupling part includes a circular cross-section section that provides a smooth, curved surface for engagement. This curved geometry facilitates easy attachment and detachment operations while the overall polygonal docking structure ensures stable connection during rotation.
3Reliability
If spring force is increased to prevent detachment, then attachment reliability is improved, but the force required for intentional detachment becomes excessively high
Solution Approach 1:
The coupling mechanism is segmented into multiple components including the docking part, coupling part with circular and polygonal sections, and seating grooves. This segmentation allows the spring force to be distributed across multiple engagement points, maintaining reliable attachment while reducing the force needed for intentional detachment at any single point.
Solution Approach 2:
The spring force parameters are optimized through the design of the seating grooves and coupling geometry. The spring constant and compression distance are carefully selected to provide sufficient holding force during rotation while allowing easy intentional detachment, balancing reliability with operational ease.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enhances the ease of attachment and detachment of the suction tube, preventing unintended detachment during rotation and stabilizing the surgical procedure by requiring a higher force for separation than attachment.
Implementation Method 1
the springs undergo compression deformation in turn, but in the process of detaching the suction tube from the shaft, the springs undergo deformation at the same time, such that a detaching force for detaching the suction tube from the shaft is greater than an attaching force for attaching the suction tube to the shaft
Data Source
AI summary
The present disclosure provides a medical shaver including: a shaver body (10) having a hollow portion therein; a shaft (20) having one end rotatably attached inside the shaver body and having a motor attachment part provided on the other end that is exposed outside the shaver body; a suction tube (30) rotatably attached to the hollow portion of the shaver body and having one end detachably coupled to the shaft so as to be rotated together with the shaft; a first seating groove (27) provided on an inner circumferential surface of the shaft; a second seating groove (33) provided on an outer circumferential surface of the suction tube; and a spring (s) located in the first and second seating grooves and coupling the shaft and the suction tube, in which the spring (s) has a structure in which both ends of a coil spring are connected to form a ring shape.