Rocker Arm Assembly for Head Fixation Device Stabilization
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Solution Overview
Problem
Existing head fixation devices (HFDs) lack a robust and adjustable mechanism for securely positioning stabilizing features, such as skull pins or pads, which limits their effectiveness in stabilizing patient heads during surgical and medical procedures.
Innovation Solution
The introduction of a rocker arm assembly that is rotatably adjustable and lockable within a head fixation device, allowing for precise positioning and secure fixation of stabilizing features at any rotational position, enhancing patient head stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing head fixation devices are used, then basic head stabilization is provided, but the mechanism for positioning stabilizing features lacks robustness and adjustability
Solution Approach 1:
The patent applies the dynamics principle by implementing a rotatable arm mechanism that can be positioned at multiple angular orientations (0-360 degrees) and locked at any desired position. This dynamic positioning capability allows the stabilizing features to be adjusted to various angles and orientations, providing both robust stabilization and comprehensive adaptability for different surgical requirements.
Solution Approach 2:
The patent applies segmentation by dividing the head fixation device into distinct functional modules: a rotatable arm assembly, a locking mechanism, and stabilizing feature holders. This modular segmentation enables independent adjustment and positioning of each component, enhancing both the reliability of stabilization and the versatility of positioning options.
2Reliability
If stabilizing features are securely fixed, then head stabilization reliability improves, but the ability to adjust positioning is limited
Solution Approach 1:
The locking mechanism enables the arm to be dynamically adjusted to any angular position and then securely locked. The mechanism transitions between a locked state (providing secure fixation) and an unlocked state (allowing adjustment), thereby achieving both reliable fixation security and ease of positioning adjustment.
Solution Approach 2:
The locking mechanism is designed to be self-contained and self-operating, allowing the user to easily lock and unlock the arm at any position without requiring additional tools or complex procedures. This self-service design enhances ease of operation while maintaining fixation security.
Data Source
AI summary
A head fixation device includes a rocker arm assembly containing one or more stabilizing features. The rocker arm is rotatably adjustable about a longitudinal axis of the rocker arm assembly to any rotational position in a non-stepped fashion. The rocker arm assembly is removable from the head fixation device for easy of cleaning. A lever of the rocker arm assembly translates a shaft and includes eccentric features to provide a camming action for moving locking features of the rocker arm assembly to an unlocked state such that the rocker arm can be rotationally adjusted.