Optical Element Supporting Assembly for Thin Long-Focal Modules
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Solution Overview
Problem
The challenge is to design an optical element driving mechanism that allows for the miniaturization of electronic devices while accommodating optical elements with long focal lengths, without increasing the device's thickness.
Innovation Solution
The proposed optical element driving mechanism includes a movable part connected to the optical element, a fixed part, a driving assembly, and supporting assemblies. The mechanism allows the movable part to move relative to the fixed part, driven by the driving assembly and supported by the first and second supporting assemblies, which include elongated structures and positioning elements made of metal with low magnetic permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an optical element with a long focal length is provided in an electronic device, then the optical element can achieve better imaging performance, but the thickness of the electronic device increases
Solution Approach 1:
The patent transitions from linear movement to rotational movement of the optical element. By rotating the optical element around an axis rather than moving it linearly along the optical path, the system achieves focal length adjustment without increasing the device's thickness in the direction perpendicular to the rotation plane.
Solution Approach 2:
The optical element is rotatably mounted within a confined space using a rotation axis that passes through or near its center of gravity. This nesting approach allows the optical element to be housed compactly within the device structure while still enabling effective rotation for focal length adjustment.
2Ease of operation
If the movable part is allowed to move freely relative to the fixed part, then the operation smoothness is improved, but the stability and positioning accuracy deteriorate
Solution Approach 1:
The patent changes the physical state of the supporting elements from rigid to flexible. The flexible supporting elements can deform elastically during rotation, providing smooth movement, then return to their original shape to maintain stable positioning, thus achieving both operation smoothness and positioning accuracy.
Solution Approach 2:
The flexible supporting elements are designed to provide elastic cushioning during the rotation process. This beforehand cushioning absorbs shocks and vibrations, ensuring smooth operation while maintaining the optical element's positional stability after rotation.
3Volume of moving object
If a compact structure is used to miniaturize the optical element driving mechanism, then the device thickness is reduced, but the manufacturing precision and assembly difficulty increase
Solution Approach 1:
The flexible supporting elements are designed to automatically adjust and position the optical element during assembly through their elastic properties. This self-service mechanism reduces the need for high-precision manual assembly while maintaining compact dimensions, as the flexible elements self-align and self-adjust during the assembly process.
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 effectively miniaturizes the optical element driving mechanism, enhances stability, and increases manipulation accuracy, allowing for smooth operation while maintaining the compactness of electronic devices.
Implementation Method 1
The positioning element includes a low magnetic-permeability material
Data Source
AI summary
An optical element driving mechanism is provided, including a movable part, a fixed part, a driving assembly, and a first supporting assembly. The movable part is used for connecting an optical element. The movable part is movable relative to the fixed part. The driving assembly is used for driving the movable part to move relative to the fixed part. The movable part is movable relative to the fixed part through the support of the first supporting assembly. There is a gap between the movable part and the fixed part.