Nested Optical Driving Mechanism With Composite Buffer
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Solution Overview
Problem
The miniaturization of electronic devices, such as cameras and smartphones, complicates mechanical design and leads to low reliability and driving force for moving lenses, making it challenging to effectively adjust focus.
Innovation Solution
A driving mechanism comprising a movable part, a fixed part, a housing with a buffer member, and an outer case with a flexible sheet, which uses electromagnetic forces from coils and magnets to move optical elements, enhancing reliability through structural design and adhesives, and includes conductive elements for electrical communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the electronic device is miniaturized, then the device size is reduced, but the driving force for moving the lens decreases and reliability lowers
Solution Approach 1:
The movable part is received within the housing, and the buffer member is received within the movable part, creating a nested structure. This allows multiple functional components to be integrated in a compact arrangement, achieving miniaturization while maintaining sufficient driving force and reliability through the coordinated interaction of nested components.
Solution Approach 2:
The buffer member is formed by combining a buffer body made of a first material with a buffer coat made of a second material that has different properties (higher elasticity or hardness). This composite structure allows the buffer member to provide both mechanical support and shock absorption, enabling reliable lens movement in miniaturized devices.
2Volume of moving object
If the electronic device is miniaturized, then the device size is reduced, but the driving force for moving the lens decreases
Solution Approach 1:
The nested arrangement of the movable part within the housing and the buffer member within the movable part maximizes the use of available space. This allows the driving mechanism to generate sufficient force within a compact volume, addressing both miniaturization and driving force requirements.
Solution Approach 2:
The composite buffer member with differentiated material properties optimizes force transmission and shock absorption, ensuring that the driving force is effectively transmitted to move the lens even in a miniaturized configuration.
3Volume of moving object
If the electronic device is miniaturized, then the device size is reduced, but mechanical design becomes more difficult
Solution Approach 1:
The buffer member integrates multiple functions: it provides shock absorption, guides lens movement, and structurally connects components. By merging these functions into a single component formed by combining different materials, the design complexity is reduced despite the miniaturized scale.
Solution Approach 2:
The composite buffer member simplifies the overall mechanical design by consolidating multiple functional requirements into a single component with differentiated material properties, reducing the number of separate parts needed in the miniaturized system.
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 mechanism effectively addresses the challenges of miniaturization by providing a reliable and efficient means to move optical elements, ensuring high reliability and miniaturization while maintaining driving force, suitable for auto-focusing and optical image stabilization.
Implementation Method 1
the buffer member is formed by combining a buffer body made of a first material with a buffer coat made of a second material, wherein the buffer coat has higher elasticity or hardness than the buffer body
Implementation Method 2
the first adhesive is disposed between the housing and the fixed part
Data Source
AI summary
A driving mechanism for driving an optical element to move is provided, including a movable part, a fixed part, a housing connected to the fixed part, and a buffer member. The movable part is configured to hold the optical element. The fixed part is connected to the movable part, wherein the movable part is movable relative to the fixed part. The housing has a top cover and at least a sidewall connected to the top cover. The buffer member is disposed on the housing and extends from the top cover to the sidewall.