Medical Housing Face Panel Sealing With Lateral Preload
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Solution Overview
Problem
Patient monitors and medical devices face challenges in maintaining a durable and tight seal against contaminants and moisture, especially in clinical environments where frequent cleaning with aggressive agents is required, leading to degradation of existing sealing methods and increased contamination risk.
Innovation Solution
A housing face panel arrangement with a frame portion and a deformable seal that is laterally preloaded, providing a circumferential seal independent of axial mounting force, ensuring a reliable and durable seal that withstands frequent cleaning and mechanical stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a foam seal is dispensed within the housing and compressed using a rib formed on the bezel/panel, then the seal creates a barrier against contaminants, dust, and moisture, but the assembly process degrades the foam's effectiveness over time
Solution Approach 1:
The patent changes the sealing mechanism from axial compression of foam to lateral compression of an elastomeric material. The seal is compressed in a direction substantially perpendicular to the mounting force direction, which fundamentally alters the sealing parameter and prevents the degradation issues associated with axial foam compression.
Solution Approach 2:
Instead of compressing the seal axially in the same direction as the mounting force, the patent inverts the approach by designing the seal to be compressed laterally, perpendicular to the mounting force. This inversion of the sealing direction resolves the contradiction between initial sealing effectiveness and long-term durability.
2Strength
If pins and other features are used for securing the bezel/front panel to the housing, then the components are firmly attached, but accurate tolerances are necessary to ensure proper sealing
Solution Approach 1:
The patent changes the sealing parameter from axial compression to lateral compression, which fundamentally alters how the seal engages with the housing. This parameter change reduces sensitivity to manufacturing tolerances because the lateral compression mechanism is less dependent on precise axial positioning of pins and mounting features.
Solution Approach 2:
The patent moves the sealing action from one dimension (axial, same direction as mounting) to another dimension (lateral, perpendicular to mounting). This dimensional change allows the seal to function effectively even when axial tolerances are not tightly controlled, thereby reducing the manufacturing precision requirements.
3Reliability
If the seal is compressed axially by the mounting force, then the seal is pressed against the housing, but the sealing function degrades over time under aggressive cleaning conditions
Solution Approach 1:
The patent fundamentally changes the sealing parameter from axial compression to lateral compression. The elastomeric material is compressed in a direction perpendicular to the mounting force, which creates a more durable seal that maintains its effectiveness under aggressive cleaning conditions and over time.
Solution Approach 2:
The patent inverts the traditional sealing approach by compressing the seal laterally rather than axially. This inversion causes the sealing force to be applied perpendicular to the mounting direction, which prevents the degradation that occurs with axial foam compression and extends the seal's operational life.
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 cleanability, disinfectability, and reduces the likelihood of leaks, facilitating easy assembly and maintenance while maintaining a strong seal, even under aggressive cleaning conditions.
Implementation Method 1
a sealing part that is arranged to be disposed between the frame portion and a housing wall to seal a gap therebetween, wherein the sealing part has a deformable seal that is laterally preloaded when the frame portion is mounted to the housing opening
Data Source
Figure 1~2
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Figure 5
AI summary
The present disclosure relates to a housing face panel arrangement (16, 36) for covering a housing opening (48) of a medical device (10, 30) and to a medical device (10, 30) that is equipped with such a housing face panel arrangement (16, 36). The housing face panel arrangement (16, 36) comprises a frame portion (20, 40) having an outer side (60) and an inner side (62), and a sealing part (52) that is arranged to be disposed between the frame portion (20, 40) and a housing wall (54) to seal a gap (98) therebetween. An insertion section (66) is formed at the inner side (62), wherein the insertion section (66) protrudes into the housing opening (48) in the mounted state of the housing face panel arrangement (16, 36). The sealing part (52) has a deformable seal (78) that is laterally preloaded when the frame portion (20, 40) is mounted to the housing opening (48).