Metallic Contact Disk for Window Pane Sealing and Shielding
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Solution Overview
Problem
Housing covers with integrated viewing windows in electronics housings for industrial measurement and automation devices face challenges in providing a sufficient blocking effect against electromagnetic waves while maintaining impact resistance and being cost-effectively produced.
Innovation Solution
A housing cover design featuring a pot-shaped, metallic cover base with a translucent window pane and a ring-shaped contact disk that forms a mechanical and galvanic connection with the cover side wall, utilizing a seal and metallization to enhance sealing and electromagnetic compatibility, and incorporating an elastically deformed contact disk for increased impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a viewing window is integrated into the housing cover, then visibility of display elements is improved, but electromagnetic shielding effectiveness deteriorates
Solution Approach 1:
A metallic contact disk is introduced as an intermediary element between the translucent window pane and the metallic cover base. This contact disk provides the electromagnetic shielding function while allowing light transmission, thus resolving the contradiction between visibility and electromagnetic shielding effectiveness
Solution Approach 2:
The housing cover employs a composite structure combining translucent material (for visibility), metallic contact disk (for electromagnetic shielding), and sealing elements. This multi-material approach allows simultaneous achievement of optical transparency and electromagnetic protection
2Object-affected harmful factors
If a window pane is sealed to the cover base, then sealing against environmental factors is improved, but impact resistance deteriorates
Solution Approach 1:
The metallic contact disk serves as a mediator between the window pane and cover base, providing both sealing function and mechanical reinforcement. This intermediary element distributes impact forces while maintaining the seal, resolving the contradiction between sealing effectiveness and impact resistance
Solution Approach 2:
The combination of translucent window pane material, metallic contact disk, and sealing material creates a composite structure that simultaneously achieves environmental sealing and enhanced impact resistance through the synergistic properties of different materials
3Object-affected harmful factors
If a complex connection structure is used for the window pane, then sealing and electromagnetic shielding are improved, but manufacturing complexity increases
Solution Approach 1:
Multiple functions (sealing, electromagnetic shielding, mechanical support, and impact resistance) are merged into a single metallic contact disk element. This consolidation simplifies the overall structure and manufacturing process while maintaining all required protective functions
Solution Approach 2:
The metallic contact disk is designed as a multi-functional element that simultaneously provides sealing, electromagnetic shielding, mechanical support, and impact resistance. This universal component reduces the total number of parts and simplifies manufacturing
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 solution provides a simple yet effective mechanical and galvanic connection that enhances the viewing window's impact resistance and electromagnetic shielding, ensuring reliable sealing and protection against environmental factors while being cost-effectively produced.
Implementation Method 1
a seal placed between the window pane and the cover base
Implementation Method 2
the window pane, on its side facing away from the cover base, at least in an area contacted by the contact disk, is metallized at least partially, in particular completely, in such a way that the window pane forms a predominantly reflecting screen for electromagnetic waves
Implementation Method 3
The contact disk is at least partially elastically deformed relative to an original initial state, especially in the region of its outer edge
Data Source
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AI summary
The housing cover (220) comprises a cover base (21) with a cover bottom (221+) that has an opening (221'), a surrounding cover lateral wall (221#) that adjoins an edge of the cover bottom, a window pane (222) consisting of translucent material and placed on a side of the cover bottom (221+) facing the cover lateral wall (221#) in such a manner as to shut the opening of the cover bottom, and a contact plate (223) placed on a side of the window pane facing away from the cover bottom. The cover side wall has a groove (224) on an internal side facing the window pane, whilst the contact plate has a contact region (223+) that lies on the window pane and an (223') external edge with a plurality of teeth (223#) that are formed thereinto and are in engagement with the groove.