Optical Image Stabilization Actuator with Nested Guide Rails
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Solution Overview
Problem
Conventional actuators for reflectors in camera modules face challenges in maintaining precision and efficiency due to complex structures and interference between independent movements in X and Y axes, leading to compromised space utilization and driving precision.
Innovation Solution
The actuator design incorporates a carrier with groove rails, magnets, and a middle guide with orthogonal electromagnetic fields, along with a pulling yoke and magnets, to simplify the physical structure and enhance independent movement precision, preventing interference and improving space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent movement structures are added for X and Y axes, then movement capability is improved, but device complexity increases
Solution Approach 1:
The patent merges the X-axis and Y-axis movement structures into a single integrated guide rail system. The guide rail simultaneously provides guidance for both axial movements, eliminating the need for separate independent movement structures for each axis. This integration maintains the full movement capability while significantly reducing structural complexity and the number of components.
Solution Approach 2:
The guide rail is designed as a universal component that performs multiple functions: it guides movement in both X and Y axes, provides structural support, and enables the reflector to achieve stabilization in perpendicular directions. This multi-functional design eliminates the need for separate dedicated structures for each movement axis.
2Manufacturing precision
If separate configurations are added for independent movement in each direction, then movement precision is improved, but space utilization deteriorates
Solution Approach 1:
The patent employs a nested arrangement where the guide rail structure is integrated within the existing actuator housing. The guide rail for both axes is positioned concentrically, with the X-axis guidance nested within the Y-axis guidance structure. This nesting allows precise independent movement in both directions while minimizing the overall volume occupied by the movement mechanism.
3Adaptability or versatility
If complex physical structures are used for movement in each direction, then movement capability is improved, but assembly efficiency deteriorates
Solution Approach 1:
The patent segments the movement system into modular components: a single integrated guide rail assembly, electromagnetic driving units, and magnetic support elements. This segmentation allows each module to be manufactured and tested independently, then assembled together in a straightforward sequence, significantly improving assembly efficiency while maintaining full movement capability in both X and Y axes.
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 design achieves improved driving precision and space utilization by simplifying the motion relationship and eliminating interference between movements, allowing for effective image stabilization in both X and Y axes without increasing the device's thickness.
Implementation Method 1
a first magnet provided above the carrier based on an optical axis direction... a first coil configured to face the first magnet
Implementation Method 2
a second magnet provided at the rear of the middle guide... a second coil configured to face the second magnet
Implementation Method 3
a pulling magnet provided at the rear of the carrier to face the pulling yoke and configured to generate an attractive force to the pulling yoke
Data Source
AI summary
An actuator for a reflector may include a carrier having a first groove rail at the rear, a first magnet above the carrier, a middle guide having a first guide rail to face the groove rail and having a second groove rail of a track shape at the rear, a first ball between the first groove rail and the first guide rail, a second magnet at the rear of the middle guide, a base having a second guide rail to face the second groove rail and the middle guide, a second ball between the second groove rail and the second guide rail, a circuit board with a first coil and a second coil, a pulling yoke at the front of the middle guide, and a pulling magnet at the rear of the carrier to face the pulling yoke and to generate an attractive force to the pulling yoke.