Lens Driving Apparatus Guide System for Rotation Blur
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Solution Overview
Problem
Conventional lens driving apparatuses face challenges in maintaining a stable balance and preventing rotation blur and image shake, especially when the mass of the lens group is large, often requiring increased motor load and energizing force.
Innovation Solution
A lens driving apparatus with a rack and guide system, including a first and second guide part, and an energizing member that applies force to the second guide part, allowing for stable energization of the lens group without increasing motor rotation load, using either a spring or magnet as the energizing member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mass of the lens group is increased, then the optical performance is improved, but the stability of the lens group balance deteriorates causing tilt and rotation blur
Solution Approach 1:
The guide structure is divided into two separate guide parts positioned at different locations. The first guide part guides the lens holding frame directly, while the second guide part guides the energizing member separately. This segmentation allows independent optimization of each guide's function, enabling stable balance control without compromising optical performance.
Solution Approach 2:
The energizing member acts as an intermediary between the motor and the lens holding frame. It transmits the motor's rotational force to the rack, which then moves the lens holding frame. This intermediary mechanism enables precise control of the lens group's movement and balance, preventing tilt and rotation blur while maintaining high optical performance.
2Force
If the interposing force of the rack is increased to energize the lens group, then the energizing force is improved, but the rotation load on the motor increases
Solution Approach 1:
The guide parts are arranged in different spatial dimensions and orientations. The first guide part extends in one direction while the second guide part extends in another direction, creating a multi-dimensional guide structure. This dimensional arrangement allows the energizing force to be applied efficiently without increasing the motor's rotation load, as the force is distributed across different spatial dimensions.
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 regulates rotation blur and prevents image shake while maintaining low motor load, ensuring excellent optical performance and balance.
Implementation Method 1
a spring that surrounds the second guide bar in a state of being in contact with the second guide bar and that is pressed by the lens holding frame toward the second guide bar
Implementation Method 2
a magnet that is held by the lens holding frame and that attracts the second guide bar to the lens holding frame
Data Source
AI summary
The lens driving apparatus includes a lens holding member that holds lens; a rack provided in the lens holding member transmits a motor driving force to the lens holding member; a first guide part that supports the lens holding member to be movable back and forth in an optical axis direction of the optical lens; a second guide part that supports the lens holding part to be movable as a first guide part, farther separated from the rack than the first guide part in a direction orthogonal to the optical axis direction; both contact parts in the lens holding part, with which both guide parts respectively are in contact; and an energizing part that energizes the second contact part at a position separated in the longitudinal direction of the second guide part so as to be in contact with the second guide part.