Breathable Film Protection via Nested Shield Geometry
Solution Overview
Problem
Conventional electronic equipment with breathable films are prone to damage from intentional loads such as high-pressure cleaning nozzles or foreign objects due to the lack of effective protection.
Innovation Solution
The electronic apparatus incorporates a protective structure with a penetrating hole, a breathable film, and a protective cap or ring configuration where the opening's edges are positioned to prevent direct contact with the breathable film, ensuring that the film is shielded from external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the breathable film is placed directly in the ventilation hole without protective structure, then the ventilation function is simple and easy to manufacture, but the breathable film is vulnerable to damage from high-pressure cleaning nozzles and foreign objects
Solution Approach 1:
The breathable film is nested within the protective structure, specifically positioned inside the penetrating hole of the case while being covered by the protective cap or ring. This nested arrangement allows the protective structure to enclose and shield the breathable film from external threats like high-pressure cleaning nozzles and foreign objects, while maintaining the ventilation function through the breathable film's selective permeability properties
Solution Approach 2:
The protective structure acts as an intermediary between the external environment and the breathable film. It includes a case with a penetrating hole, a breathable film positioned in the hole, and a protective cap or ring that covers the film from the outside. This intermediary structure allows gas to pass through the breathable film while blocking harmful external factors, thus protecting the film without compromising ventilation
2Reliability
If the protective structure completely seals the breathable film, then the film is fully protected from damage, but the ventilation function is blocked
Solution Approach 1:
The protective structure is designed with differentiated local qualities: the case and protective cap/ring provide solid protection against external threats, while the breathable film positioned in the penetrating hole maintains selective permeability. This local differentiation allows the protective structure to shield the film from damage while the film itself continues to allow gas passage, thus maintaining ventilation function
Solution Approach 2:
The breathable film is a porous material that allows gas to pass through while blocking liquid and foreign objects. The protective structure leverages this porous property by positioning the film within the penetrating hole and covering it with a protective cap or ring. The porous structure enables ventilation through gas permeability while the protective structure blocks harmful external factors, thus maintaining both protection and ventilation functions simultaneously
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
This configuration effectively reduces damage to the breathable film by deflecting rods and high-pressure liquid jets, ensuring the film's integrity and functionality.
Implementation Method 1
a porous layer 110 which comprises PTFE or the like
Implementation Method 2
a water-repellent/oil-repellent layer 108 comprising polyethylene terephthalate (PET) or the like
Implementation Method 3
an outside upper edge of the opening is positioned on or inside a straight line connecting an outer edge of the breathable film and an inside lower edge of the opening
Data Source
AI summary
A case has a penetrating hole, which is provided with a breathable film. A protective structure comprises a protective ring and a protective cap, and is provided outside the case so as to cover the breathable film. A gap between the protective ring and the protective cap is an opening connecting the inside and outside of the protective structure. In a cross-sectional view, an outside upper edge of the opening (i.e. point B) is positioned on or inside a straight line connecting an outer edge of the breathable film (i.e. point C) and an inside lower edge of the opening (i.e. point A). The breathable film can be protected from an intentional load applied thereto.