Photographing Optical Device with Integrated Lens Drive and Shake Correction
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Solution Overview
Problem
Conventional photographing optical devices with shake correction functions are bulky due to separate components for lens drive and shake correction mechanisms, and lack efficient size reduction strategies, especially in portable devices where thickness is a concern.
Innovation Solution
A photographing optical device design that integrates lens drive and shake correction mechanisms using common drive magnets, with a support body that includes a case body with a facing part to restrict the movable module's range, reducing the need for additional stoppers and allowing for a thinner profile, and utilizing plate springs to connect the movable module with the support body, thereby reducing size and component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate components are used for lens drive and shake correction mechanisms, then the device can maintain effective functionality, but the device size and thickness increase
Solution Approach 1:
The patent merges the lens drive mechanism and shake correction mechanism into a single integrated structure. The movable module contains both the lens assembly and shake correction assembly, allowing both functions to operate within the same spatial envelope. This integration eliminates the need for separate drive mechanisms, thereby reducing overall device thickness while maintaining both autofocus and shake correction functionalities.
Solution Approach 2:
The movable module serves multiple functions simultaneously: it houses the lens for autofocus operation and the shake correction assembly for stabilization. The single movable module structure performs both lens positioning and shake correction tasks, making the system multi-functional and reducing the need for additional components that would increase thickness.
2Reliability
If additional stoppers and cover members are added to restrict movable range, then the plate spring is protected from damage, but the device size increases
Solution Approach 1:
The case body is designed to serve multiple functions: it provides structural housing for the device and simultaneously acts as a stopper to restrict the movable range of the movable module. By integrating the stopping function into the existing case body structure, the patent eliminates the need for separate stopper components, thereby protecting the plate spring from damage during impacts without increasing device size.
3Length of stationary object
If common drive magnets are used for both lens drive and shake correction, then the device size is reduced, but the magnetic field interference may affect performance
Solution Approach 1:
The patent segments the magnetic drive system into distinct regions within the movable module. The drive magnets are positioned such that one set interacts with the lens drive coil while another set interacts with the shake correction coil. This spatial segmentation of magnetic interactions allows common drive magnets to be used for both functions while minimizing magnetic field interference between the two mechanisms, thereby maintaining performance reliability.
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 design achieves a thinner profile and reduced size in both optical axis and radial directions, simplifies the structure by using common magnets, and prevents damage to the plate spring during impacts, while maintaining effective shake correction and autofocus functionality.
Implementation Method 1
a lens drive coil which is attached to the movable body, a shake correction coil which is attached to the support body, and a plurality of drive magnets having a first opposed face which faces the lens drive coil and a second opposed face which faces the shake correction coil
Data Source
AI summary
A photographing optical device may include a movable module including a movable body and a holding body; a support body to hold the movable module; a lens drive coil attached to the movable body; a shake correction coil attached to the support body, and a plurality of drive magnets attached to the holding body. The holding body may include a first magnet fixing member and a second magnet fixing member. The first magnet fixing member and the second magnet fixing member may be formed in a frame shape. The movable body may be disposed on inner peripheral sides of the first magnet fixing member and the second magnet fixing member. The support body may include a case body structuring an outer peripheral face of the support body. An object side end of the case body may include a facing part which faces an end face of the movable body.