Brush Vibration for Dust Mitigation in Hinge Apertures
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Solution Overview
Problem
Electronic devices with openings, such as hinges or sliding components, are prone to dust ingress, which can reduce performance and lifespan by allowing dust to enter internal recesses during movement.
Innovation Solution
An apparatus with a brush and vibration device is used at the aperture, activating different vibration modes to either collect or shed dust based on the device's movement, utilizing distinct fiber responses to specific vibrational stimuli to manage dust ingress and egress effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hinge or sliding component is provided to enable device movement, then device functionality and adaptability are improved, but dust ingress into internal recesses occurs reducing reliability
Solution Approach 1:
A brush component is introduced as an intermediary element positioned at the aperture leading to the internal recess. The brush fibers act as a mechanical barrier that intercepts dust particles while allowing the hinge or sliding component to move freely, thus protecting the internal recess without compromising device functionality
Solution Approach 2:
A vibration device is incorporated to deliver vibrational stimuli to the brush fibers. This mechanical vibration causes the fibers to move and flex, enhancing their ability to trap dust particles while maintaining clearance for the moving component, thereby improving dust protection effectiveness
2Reliability
If a brush is provided at the aperture to prevent dust ingress, then dust protection is improved, but the moving component may experience increased friction or wear
Solution Approach 1:
The brush is designed with localized fiber distribution where denser fiber packing occurs at the aperture opening to maximize dust blocking, while the density gradually decreases toward the internal recess. This gradient structure provides effective dust protection at the critical interface while minimizing friction and wear on the moving component
Solution Approach 2:
The vibration device periodically agitates the brush fibers, preventing them from adhering to the moving component surface. This vibrational motion reduces static friction and prevents wear accumulation, allowing the brush to maintain its protective function without degrading the moving component
3Reliability
If the brush fibers are made dense to improve dust collection, then dust protection is improved, but dust shedding becomes difficult reducing maintenance efficiency
Solution Approach 1:
The vibration device operates in periodic cycles, alternating between high-amplitude vibrations that loosen and shed accumulated dust from the brush fibers, and lower-amplitude vibrations that maintain dust trapping. This periodic action allows the brush to efficiently collect dust during normal operation and then easily shed it during maintenance cycles
Solution Approach 2:
High-frequency vibrations delivered by the vibration device create a shaking effect on the brush fibers, dislodging accumulated dust particles. This mechanical vibration transforms the stuck dust into loose particles that can be easily removed, facilitating maintenance without requiring disassembly
4Ease of operation
If a vibration device is added to enable dust shedding, then ease of maintenance is improved, but device complexity increases
Solution Approach 1:
The vibration device is designed to serve multiple functions: it vibrates the brush fibers to enhance dust trapping during normal operation, enables dust shedding during maintenance, and can potentially be used for other device functions such as tactile feedback or component actuation. This multi-functionality justifies the added complexity by providing value beyond single-purpose dust management
Solution Approach 2:
The vibration device is integrated with existing device structures, such as combining it with the hinge mechanism or sliding component assembly. By merging the vibration function with existing components, the patent avoids adding completely separate systems, thereby reducing the overall complexity increase while still achieving effective dust shedding capability
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 effectively prevents dust from entering internal recesses by activating the appropriate vibration mode during device manipulation, ensuring dust is either collected or shed, thereby maintaining device performance and extending its lifespan.
Implementation Method 1
a vibration device configured to deliver a vibrational stimulus to the brush. The vibration device activates a dust collection mode in response to a first movement of the first component relative to the second component and activates a dust shedding mode in response to a second movement
Implementation Method 2
The brush may include a first set of fibers that exhibit a first resonant response to the vibrational stimulus and a second set of fibers that exhibit a second resonant response to the vibrational stimulus
Implementation Method 3
During the dust shedding mode, the fibers may exert a net force that moves dust in a direction away from the recess
Data Source
AI summary
Dust mitigation techniques are disclosed. An example apparatus includes a first component coupled in a movable relationship with a second component. The first component or the second component includes a recess accessible through an aperture. The apparatus also includes a brush disposed at the aperture and comprising fibers configured to prevent intrusion of dust into the recess. The apparatus also includes a vibration device configured to deliver a vibrational stimulus to the brush, wherein the vibration device activates a dust collection mode in response to a first movement of the first component relative to the second component and activates a dust shedding mode in response to a second movement of the first component relative to the second component.