Dustproof Cover for Projector Connector
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Solution Overview
Problem
Conventional dustproof measures for projection type image display apparatuses are insufficient to prevent dust and dirt from entering and affecting internal components, leading to degradation of function and durability, especially in environments with high dust and dirt levels.
Innovation Solution
A comprehensive dustproof system is implemented using a connector cover, dustproof cover, and elastic dustproof sheet to hermetically shield the space below the circuit board, combined with clogged via holes and a resin dustproof cover to prevent dust and dirt entry through connectors and pinholes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dustproof measures (air filter at opening, dustproof space with buffer material) are implemented, then dustproof performance is partially improved, but dust and dirt can still enter through clearances and pinholes, leading to degradation of function and durability
Solution Approach 1:
The dustproof cover is divided into multiple segments (first dustproof cover and second dustproof cover) that can be assembled together to form a complete seal around the connector. This segmentation allows for effective dustproof protection while maintaining ease of assembly and disassembly for maintenance purposes.
Solution Approach 2:
The dustproof cover is designed to fit over the connector in a nested configuration, with the connector inserted through the dustproof cover. This nested structure ensures that the connector is protected from dust and dirt while still allowing electrical connections to be made through the dustproof barrier.
2Reliability
If comprehensive dustproof measures are implemented to prevent dust and dirt entry, then reliability is improved, but device complexity increases due to additional components like connector covers and dustproof covers
Solution Approach 1:
The dustproof cover serves multiple functions simultaneously: it provides dustproof protection, maintains electrical connectivity through the connector, and allows for easy assembly and disassembly. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving comprehensive dustproof protection.
3Ease of operation
If the connector is exposed for electrical connections, then ease of operation is improved, but dust and dirt can enter through the connector and pinholes, worsening dustproof performance
Solution Approach 1:
The dustproof cover acts as an intermediary element between the connector and the external environment. It allows electrical connections to be made through the connector while simultaneously blocking dust and dirt from entering through the connector and its pinholes. This intermediary structure resolves the contradiction by providing both accessibility and protection.
Data Source
AI summary
The projection type image display apparatus is equipped with a lamp unit (22), an optical block (21) which modulates light from the lamp unit and projects an image signal, a circuit board (24) having via holes and on which an external connector (25) is mounted, and a cabinet (2) for housing the aforementioned elements. The display apparatus is equipped with a back cover (26) provided to cover around the external connector from the outside and a dustproof cover (29) provided to cover around the external connector from the inside. A closed space is formed by the circuit board, the back cover (26) and the dustproof cover (29), and the dustproof cover closely shields at least a space below the circuit board from the exterior. Excellent dustproof characteristics enabling use even in installation environments with a large amount of dust and dirt can be obtained.