Driving Mechanism for Optical Element with Resilient Buffering
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Solution Overview
Problem
The miniaturization of electronic devices has led to challenges in efficiently utilizing space within driving mechanisms for optical elements, particularly in achieving effective movement and focus adjustments without compromising component protection and assembly efficiency.
Innovation Solution
A driving mechanism comprising a housing, a frame, a holder, and a driving assembly, where the holder is movably disposed within the housing, and a resilient member connects the holder to the driving assembly, allowing precise movement of the optical element along its axis while being restricted by a stop surface to prevent excessive movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the driving mechanism is miniaturized to fit electronic devices, then space utilization is improved, but the precision of optical element movement and protection against external forces deteriorates
Solution Approach 1:
The driving mechanism is divided into distinct functional modules: a driving assembly (voice coil motor) for precise movement, a resilient member (elastic element) for buffering external forces, and a stop surface for limiting movement range. This segmentation allows each component to be optimized independently, maintaining precision and protection capabilities while reducing overall mechanism size.
Solution Approach 2:
A resilient member (elastic element) is introduced between the holder and the driving assembly to buffer external forces before they can affect the optical element. This beforehand cushioning protects the precision movement system from shocks and vibrations, enabling miniaturization without sacrificing reliability or precision.
2Adaptability or versatility
If the holder is made movable to enable optical element adjustment, then focus adjustment functionality is improved, but the complexity of the driving mechanism increases
Solution Approach 1:
The driving assembly serves multiple functions: it provides precise movement for focus adjustment, works in conjunction with the resilient member for shock absorption, and interacts with the stop surface to define movement limits. This multi-functionality reduces the need for separate components, simplifying the overall mechanism while maintaining adaptability.
Solution Approach 2:
The resilient member automatically buffers external forces without requiring active control, and the stop surface passively limits movement range through mechanical contact. These self-service features reduce the complexity of control systems while enabling focus adjustment functionality.
3Reliability
If a stop surface is added to restrict holder movement, then protection against excessive movement is improved, but the device complexity increases
Solution Approach 1:
The stop surface provides passive mechanical limitation of movement through direct contact with the holder. This self-service protection mechanism requires no active control or sensing systems, achieving reliability improvement without significant complexity increase.
Solution Approach 2:
The stop surface is integrated into the housing structure, combining the protection function with the existing mechanical framework. This merging approach adds protection capability while minimizing the increase in overall device complexity.
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 enables efficient space utilization, precise optical element movement, and protection against external forces, enhancing the miniaturization and functionality of electronic devices like cameras and smartphones.
Implementation Method 1
a resilient member connects the holder to the driving assembly, allowing precise movement of the optical element
Implementation Method 2
an electromagnetic driving mechanism such as a Voice Coil Motor (VCM) is disposed therein to adjust the focus of a lens
Data Source
AI summary
A driving mechanism includes a frame, a carrying base, and a drive module. The carrying base is disposed in the frame, and includes a carrying body, a first stop element and a second stop element. The carrying body is configured to carry an optical element. The first stop element is disposed on the carrying body, and configured to limit the range of motion of the carrying body in a first direction. The second stop element is disposed on the carrying body, and configured to limit the range of motion of the carrying body in the first direction. The driving module is disposed in the frame, and configured to move the carrying body relative to the frame. The first direction is parallel to the axis of the optical element, and the first stop element is closer to the top portion of the frame than the second stop element.