Magnetic Cover Shields Camera Leads from Magnet Attraction
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Solution Overview
Problem
In camera shake correction apparatuses, bare signal leads made of magnetic material are influenced by magnetic forces from magnets, causing the stage plate to be attracted, which hinders shake-correction performance.
Innovation Solution
A magnetic cover, made of a magnetic substance, is used to cover the portion of the magnet facing the leads, preventing magnetic forces from affecting the leads and allowing the electrical board to move freely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bare leads made of magnetic material are used to connect the image pickup device to the electrical board, then electrical connection is achieved, but the leads are influenced by magnetic forces from magnets causing the stage plate to be attracted toward the magnets
Solution Approach 1:
A magnetic cover made of magnetic material is introduced as an intermediary between the magnets and the leads. The magnetic cover attracts and confines the magnetic flux from the magnets, preventing the magnetic forces from acting on the bare leads. This intermediary structure effectively shields the leads from harmful magnetic influence while maintaining electrical connectivity.
Solution Approach 2:
The magnetic cover, made of magnetic material, utilizes the same magnetic forces that harm the leads to its advantage. By positioning the magnetic cover between the magnets and leads, it redirects and contains the magnetic flux within the cover structure itself, converting the harmful magnetic field into a controlled magnetic circuit that benefits the drive mechanism while protecting the leads.
2Force
If magnets are used to drive the stage plate through magnetic forces, then drive force is generated, but the magnetic forces adversely affect the magnetic leads causing attraction toward magnets
Solution Approach 1:
The magnetic cover is strategically positioned only in the regions where magnetic flux would otherwise interfere with the leads. This localized protection allows the magnets to maintain full drive force on the stage plate while the magnetic cover creates local zones of magnetic flux confinement specifically where needed to protect the leads from harmful magnetic influence.
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 magnetic cover effectively prevents adverse magnetic influences on the leads, ensuring unobstructed movement of the electrical board and improved shake-correction performance.
Implementation Method 1
passing currents through the drive coils at the occurrence of camera shake caused by hand shake causes each drive coil, through which a current is passed, to produce a driving force for moving the electrical board and the image pickup device
Implementation Method 2
at least one magnetic cover, made of a magnetic substance, for covering a portion of the magnet which faces the leads
Data Source
AI summary
A shake correction apparatus of a camera, includes a stationary support board; an electrical board movable relative to the stationary support board; an image pickup device supported by the electrical board and including leads made of a magnetic material which are arranged on a periphery of the image pickup device to electrically connect the image pickup device to the electrical board; at least one drive coil which moves with the electrical board; at least one magnet provided on a surface of the stationary support board which faces the electrical board, and positioned around the image pickup device and the leads as viewed from the front thereof, the magnet exerting a magnetic force on the drive coil; and at least one magnetic cover, made of a magnetic substance, for covering a portion of the magnet which faces the leads.