Glasses-shaped device waterproofing via FPC routing
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Solution Overview
Problem
Glasses-shaped electronic devices face challenges in preventing moisture, dust, and foreign matter from entering the electronic circuit components and maintaining stable connections due to structural limitations and exposure of wiring lines, which can lead to device malfunction.
Innovation Solution
The design incorporates waterproof members in conductor compartments to protect electronic circuit components and human characteristic detecting units, using flexible printed circuits for conductor wiring and positioning retainers to ensure stable connections, while routing conductors through the eyeglass frame to prevent exposure and enhance waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electric wiring lines are arranged on the outside of the eyeglass frame, then wiring operation is simplified, but the device reliability deteriorates due to exposure to moisture, dust, and foreign matter
Solution Approach 1:
The patent uses a flexible printed circuit board (FPC) as the conductor to route wiring lines through the interior of the eyeglass frame structure. This flexible conductor allows the wiring to be hidden within the frame while maintaining electrical connectivity between components, thus protecting against moisture and dust exposure while enabling reliable signal transmission.
2Reliability
If electric wiring lines are received in the eyeglass frame, then device reliability is improved by preventing exposure, but the device complexity increases due to limited space and complicated wiring operation
Solution Approach 1:
The patent routes the flexible printed circuit board through the three-dimensional interior space of the eyeglass frame, utilizing the vertical and lateral dimensions within the frame structure. This spatial arrangement allows wiring to be concealed within the frame without requiring complex external routing, effectively hiding the complexity within the device's internal geometry.
3Shape
If the eyeglass frame is made thin, then the device becomes more comfortable and aesthetically pleasing, but the volume of the electric-wiring-line compartment is reduced
Solution Approach 1:
The patent embeds the flexible printed circuit board within the existing structural layers of the thin eyeglass frame, nesting the conductor inside the frame's internal cavities and between structural components. This nesting approach allows wiring accommodation without increasing the external dimensions or thickness of the frame.
4Reliability
If waterproof members are added to prevent moisture and dust entry, then device reliability is improved, but the device complexity increases
Solution Approach 1:
The patent integrates waterproof coating or treatment directly onto the flexible printed circuit board and connection interfaces, making the conductor itself waterproof rather than adding separate waterproofing components. This multi-functional approach combines the electrical connectivity function with the waterproofing function in a single integrated solution.
Data Source
AI summary
A left electronic-component compartment has a left FPC receiving port, through which a flexible printed circuit (FPC) is inserted into the left electronic-component compartment, located adjacent to a left hinge. In the left electronic-component compartment, a left waterproof member is fitted adjacent to a left connector, which serves as a connection between the FPC and a battery. The left waterproof member prevents moisture, dust, and other foreign matter from entering the battery. A right electronic-component compartment has a right FPC receiving port, through which the FPC is inserted into the right electronic-component compartment, located adjacent to a right hinge. In the right electronic-component compartment, a right waterproof member is fitted adjacent to a right connector, serving as a connection between the FPC and electric circuitry. The right waterproof member prevents moisture, dust, and other foreign matter from entering the electric circuitry.