Drive Apparatus Noise Reduction via Coil Unit Segmentation
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Solution Overview
Problem
Existing drive apparatuses for electronic devices, such as image capturing devices, suffer from noise interference due to induced currents caused by magnetic fields generated from coils.
Innovation Solution
The drive apparatus includes a first unit with a coil, a second unit with a magnet, and a third unit with an electronic device. The electronic device is fixed to the first unit, and both units are configured to move relative to the second unit using magnetic forces. The first unit has openings along its principal surface to prevent induced currents from flowing to a specific portion, thereby reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a coil and magnet configuration is used to drive the electronic device, then the device can move by magnetic force, but induced currents are generated that cause noise in the electronic device
Solution Approach 1:
The first unit is divided into multiple regions by creating first and second openings, which segments the conductive path and prevents induced currents from flowing continuously through the entire structure. This segmentation breaks the noise-generating current loops while maintaining the magnetic driving function.
Solution Approach 2:
The patent extracts or removes the problematic first portion that would conduct induced currents by creating openings around it. By taking out this specific region from the continuous conductive path, the noise source is eliminated while the magnetic force generation is preserved.
2Strength
If the first unit is made solid without openings, then structural strength is maintained, but induced currents can flow freely causing noise
Solution Approach 1:
The patent applies local quality by making only specific portions of the first unit non-conductive (through openings) rather than the entire structure. This localized modification prevents induced currents in critical areas while maintaining the overall structural integrity and strength of the first unit.
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 noise in the electronic device by preventing induced currents from flowing to noise-prone areas, thereby enhancing the device's performance and image quality.
Implementation Method 1
the first unit and the third unit are configured to move relative to the second unit by a magnetic force between the coil and the magnet
Implementation Method 2
an induced current due to a magnetic field generated from the coil does not flow to a first portion located between the first opening and the second opening
Data Source
AI summary
A drive apparatus includes a first unit including a coil, a second unit including a magnet, and a third unit having an electronic device. The third unit is fixed to the first unit. The first unit and the third unit move relative to the second unit by a magnetic force between the coil and the magnet. The first unit includes a first opening and a second opening in a direction along a principal surface of the electronic device in an area overlapping the principal surface. The first unit is such that an induced current due to a magnetic field generated from the coil does not flow to a first portion located between the first opening and the second opening in the first unit.