Auto-adjusting Mask Stabilizer with Biasing Mechanism
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Solution Overview
Problem
Existing masks for CPAP and NIPPV treatments require complex and dexterous adjustment of forehead supports, often necessitating two hands and multiple discrete positions, which can be cumbersome and uncomfortable, and may alter the inclination between the support and the forehead during adjustment.
Innovation Solution
An auto-adjusting mask stabilizer with a biasing mechanism that allows for one-handed operation, maintains a constant angle of inclination, and can be locked in various positions, including continuous variable positions, using a spring mechanism and lock release button to facilitate quick and comfortable fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing forehead supports are used with discrete adjustment points, then the mask can be stabilized at multiple positions, but the adjustment process becomes complex and requires two hands
Solution Approach 1:
The patent transforms the static discrete adjustment points into a dynamic continuous adjustment mechanism. The forehead support is designed to be movable along the mask frame with a biasing mechanism that allows it to be positioned at any point along its travel path, eliminating the need for discrete locked positions and enabling one-handed operation.
Solution Approach 2:
The patent removes the complex locking mechanism and discrete adjustment points from the system. Instead of having multiple fixed positions with locking features, the design extracts these elements and replaces them with a simple biasing mechanism that allows continuous movement and positioning, significantly simplifying the adjustment process.
2Adaptability or versatility
If existing forehead supports are adjusted, then the mask position can be changed, but the inclination between the support and forehead changes during adjustment
Solution Approach 1:
The patent employs an asymmetric linkage mechanism where the forehead support moves along a constrained path that maintains a constant angle relative to the mask frame. This asymmetric geometric design ensures that as the support moves forward or backward, the inclination angle remains stable, providing consistent comfort and support.
3Adaptability or versatility
If manual adjustment of forehead supports is used, then the mask can be fitted to different patients, but the adjustment process is time-consuming
Solution Approach 1:
The patent implements a self-adjusting mechanism where the biasing element automatically positions the forehead support as the mask is donned or adjusted. The user simply needs to release the lock and the mechanism self-adjusts to the optimal position, eliminating the need for time-consuming manual fine-tuning for each patient.
Solution Approach 2:
The biasing mechanism is pre-configured to automatically position the forehead support at an optimal location before the user even makes contact with the adjustment mechanism. This preliminary positioning action occurs as the mask is initially fitted, significantly reducing the time required for adjustment.
4Adaptability or versatility
If complex adjustment mechanisms are used, then multiple adjustment positions are available, but the device complexity increases
Solution Approach 1:
The patent changes the fundamental parameter of adjustment from discrete locked positions to continuous movable positions. By using a biasing mechanism with a lock release button, the system provides infinite adjustment positions without requiring complex multi-component adjustment mechanisms, thereby reducing overall device complexity while maintaining versatility.
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
Enables faster, more comfortable, and less dexterous adjustment of masks with reduced complexity and parts, maintaining consistent support and seal, suitable for use with various mask types.
Implementation Method 1
a biasing element (e.g., a spring)
Implementation Method 2
a spring mechanism
Data Source
AI summary
A forehead support for a facial mask is adapted to be moveable between a first position with respect to a frame of the mask and a second position with respect to the frame. The forehead support includes a biasing mechanism that urges the forehead support in the second position. A method of positioning a forehead support with respect to a frame of a patient interface includes positioning the forehead support and patient interface assembly on a face; disengaging a forehead support locking mechanism; allowing the forehead support to move from a first position to a second position; and engaging a forehead support locking mechanism.