Lens Shift Barrel Guide Structure for Low-Load Image Stabilization
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Solution Overview
Problem
Conventional image stabilizing mechanisms in optical systems require large moving amounts of optical element units, leading to increased driving load and power consumption, and potential tilting of the optical element units.
Innovation Solution
A driving apparatus with a base, shift barrel, guide units, and driving units that utilize rolling members and biasing members to guide and move optical elements in orthogonal directions, reducing the driving load and suppressing tilt by using a configuration that supports the optical elements with three balls per axis instead of V-grooves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the moving amount of the optical element unit is increased to obtain a sufficient tilt effect, then the tilt effect is improved, but the driving load increases and the optical element unit may tilt
Solution Approach 1:
The patent divides the optical element unit into multiple independent optical elements (first optical element, second optical element, etc.) that can move independently. Each optical element is driven by separate driving units with guide units, allowing the tilt effect to be achieved through coordinated movement of multiple elements rather than moving a single large mass, thereby reducing driving load while maintaining stability.
Solution Approach 2:
The patent introduces multi-directional movement capabilities by providing guide units that constrain movement in specific directions (first direction, second direction, third direction orthogonal to optical axis). This dimensional approach allows achieving tilt effect through coordinated movements in multiple dimensions rather than simple linear displacement, reducing the required moving amount and driving load.
2Stability of the object's composition
If the moving amount of the optical element unit is increased to obtain a sufficient tilt effect, then the tilt effect is improved, but the power consumption increases
Solution Approach 1:
By segmenting the optical element unit into multiple smaller optical elements that move independently, the patent reduces the mass that needs to be accelerated and positioned for each driving action. This segmentation lowers the energy required for each movement operation, thereby reducing overall power consumption while achieving the required tilt effect through coordinated operation of multiple lighter elements.
Solution Approach 2:
The patent employs guide units with rolling members (balls) that replace traditional sliding mechanical contacts. This substitution reduces friction and mechanical resistance, thereby lowering the force required for movement and consequently reducing power consumption of the driving units.
3Stability of the object's composition
If the moving amount of the optical element unit is increased to obtain a sufficient tilt effect, then the tilt effect is improved, but the optical element unit may tilt
Solution Approach 1:
The patent segments the optical element unit into multiple independently supported optical elements, each with its own guide units and rolling members. This segmentation distributes the mechanical loads and reduces the stress on any single element, preventing tilting and maintaining stability even when achieving large tilt effects through coordinated movement of multiple elements.
Solution Approach 2:
The guide units with rolling members (balls) act as intermediaries between the driving units and the optical elements. These rolling members reduce friction and provide smooth, controlled movement while maintaining precise positioning, thereby preventing unwanted tilting of optical elements during operation.
4Force
If guide units with rolling members are used to reduce driving load, then the driving load is reduced, but the device complexity increases
Solution Approach 1:
The guide units with rolling members are designed to serve multiple functions: constraining optical element movement to specific directions, reducing friction for smooth operation, providing precise positioning, and supporting the optical elements. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in device complexity while achieving reduced driving load.
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 solution effectively reduces driving load and suppresses tilt of optical elements even with large moving amounts, ensuring stable operation and efficient use of resources.
Implementation Method 1
a first guide unit including a first rolling member, a second guide unit including a second rolling member
Implementation Method 2
a biasing member biased in the optical axis direction
Data Source
AI summary
A driving apparatus includes a shift barrel, a first guide unit including a first rolling member, a second guide unit including a second rolling member, a first movable member movable in a first direction orthogonal to the optical axis direction movable in a second direction orthogonal to the optical axis direction and the first direction, a first driving unit configured to drive the first movable member in the first direction, a third guide unit including a third rolling member, a second movable member guided by the third guide unit so as to move in the second direction relative to the base and biased against the shift barrel via a fourth rolling member, a second driving unit configured to drive the second movable member in the second direction, and a biasing member biased in the optical axis direction. The first and third guide units include different members.