Optical Member Driving Device Repulsive Magnet Pivot Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing periscopic imaging module technology in camera devices, such as those in smartphones, faces a challenge where the larger the pivotal movement of the prism pedestal, the smaller the suppression force, leading to inadequate prevention of excessive pivotal movement.
Innovation Solution
An optical member driving device is designed with a pivoting portion, a fixed portion, a pivot shaft, a driving portion, and a pivot suppressing portion, where a first magnet is provided at the pivoting portion and a second magnet at the fixed portion, with the same magnetic poles facing each other in the turning direction to enhance the repulsive force and prevent excessive pivotal movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a yoke is embedded on the lower side of the coil to suppress excessive pivotal movement by attractive force between the yoke and driving magnet, then the prism pedestal can be suppressed from excessive movement, but the suppression force decreases as the amount of pivotal movement increases
Solution Approach 1:
Instead of using attractive force between magnets to suppress pivotal movement, the patent uses repulsive force by arranging the same magnetic poles to face each other. The second magnet is configured with its magnetic pole orientation opposite to the first magnet, creating repulsion that suppresses excessive pivotal movement of the pivoting portion.
Solution Approach 2:
The patent changes the magnetic pole arrangement parameter from facing opposite poles (attractive force) to facing same poles (repulsive force). This parameter change transforms the interaction from attraction to repulsion, maintaining consistent suppression force regardless of the amount of pivotal movement.
2Reliability
If the same magnetic poles face each other between the first magnet and second magnet, then repulsive force is enhanced to prevent excessive pivotal movement, but the device complexity increases due to additional magnet configuration
Solution Approach 1:
The second magnet serves multiple functions: it provides the repulsive force for suppressing excessive pivotal movement and also acts as part of the driving mechanism. By integrating these functions into a single component, the overall device complexity is reduced despite the sophisticated magnetic configuration.
Solution Approach 2:
The patent combines the suppression function and driving function into a unified magnetic system. The first magnet and second magnet work together to provide both the repulsive suppression force and the driving torque, merging multiple functions into a compact configuration that minimizes additional complexity.
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 suppresses excessive pivotal movement of the pivoting portion, ensuring reliable prevention of excessive movement and maintaining the optical member in a central position, both in the pivoting and axial directions.
Implementation Method 1
a first magnet provided at the pivoting portion 50, and a second magnet provided at the fixed portion 60. The first magnet 1 and the second magnet 2 are disposed in such a manner that the same magnetic poles face each other in the turning direction
Data Source
AI summary
According to an aspect of the present disclosure, an optical member driving device is provided. The device includes a fixed portion, a pivoting portion with a holding portion for holding the optical member, a pivot shaft, a driving portion, and a pivot suppressing portion. The pivot suppressing portion has a first magnet at the pivoting portion, and a second magnet at the fixed portion. The first magnet and the second magnet are disposed in such a manner that the same magnetic poles face each other in the pivoting direction.