Driving Mechanism for Optical Element with Nested Housing
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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 smaller electronic devices, then space utilization is improved, but the precision and reliability of optical element movement may deteriorate
Solution Approach 1:
The driving mechanism is divided into distinct functional modules: a driving assembly (voice coil motor) for precise actuation, a holder for mounting the optical element, and a frame with stop surfaces for positioning. This segmentation allows each component to be optimized independently, maintaining precision while reducing overall size.
Solution Approach 2:
The holder is movably disposed within the housing, and the driving assembly is disposed within the housing to drive the holder. This nested arrangement allows multiple components to occupy overlapping spatial volumes, significantly reducing the overall mechanism size while maintaining functional integrity and movement precision.
2Manufacturing precision
If the holder is allowed to move freely for precise optical adjustment, then optical element movement precision is improved, but the reliability and protection against excessive movement deteriorates
Solution Approach 1:
Stop surfaces are provided on the frame to contact the holder and restrict its movement in predetermined directions. These stop surfaces act in advance to prevent excessive movement before it can occur, ensuring reliability while allowing sufficient freedom for precise optical adjustment within the permitted range.
3Reliability
If more components are added to protect the optical element, then reliability is improved, but device complexity increases
Solution Approach 1:
The frame serves multiple functions: it provides structural support, positions the holding assembly, and includes stop surfaces to restrict movement. The housing similarly provides both structural enclosure and positioning references. This multi-functionality reduces the need for separate protective components, maintaining reliability while minimizing 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 along its axis
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 for supporting an optical member is provided, including a base, a frame, a movable portion, a driving module, and an adhesive member. The base includes a plurality of first sidewalls, and at least one recess is formed on the first sidewalls. The frame includes a plurality of second sidewalls, and at least one opening is formed on the second sidewalls. The base and the frame form a hollow box, and the opening corresponds to the recess. The movable portion and the driving module are disposed in the hollow box. The driving module can drive the movable portion to move relative to the base. The adhesive member is accommodated in the opening and the recess, and extended along the first sidewalls. The adhesive member is disposed between the first sidewalls and the second sidewalls.