Optical Unit Shake Correction via Spherical Swing Mechanism
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Solution Overview
Problem
Conventional optical units with shake correction mechanisms face manufacturing complexities due to the use of multiple balls and spherical surfaces, which can complicate the support structure and make it difficult to manufacture and position correctly.
Innovation Solution
The optical unit employs a swing mechanism with a protruded spherical portion and a recessed spherical portion, where the recessed portion has a larger radius of curvature, allowing the movable body to swing relative to the fixed body without the need for a complex ball-based mechanism, reducing drive torque and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ball-based support mechanism is used to enable the movable body to swing relative to the fixed body, then the shake correction function is achieved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies spheroidality by using a spherical support surface instead of multiple balls. The support part has a spherical support surface that contacts the movable body, allowing it to swing while maintaining a simple structure. This curved surface design enables the shake correction function without requiring complex ball-based mechanisms, thus resolving the contradiction between reliability and device complexity.
2Reliability
If multiple balls are used in the support mechanism, then the movable body can be supported to swing, but the manufacturing precision and positioning difficulty increase
Solution Approach 1:
The patent merges multiple balls into a single spherical support surface. Instead of using multiple separate balls that require precise positioning, the support part has one integrated spherical surface that provides the same support and swing functionality. This merging eliminates the need for multiple ball positioning operations, significantly reducing manufacturing precision requirements and simplifying the production process.
3Reliability
If a complex ball-based mechanism is used, then the movable body can be supported to swing, but the drive torque increases
Solution Approach 1:
The spherical support surface provides a smooth, continuous contact area that reduces friction compared to point-contact ball mechanisms. The curved geometry allows the movable body to swing with minimal resistance, reducing the drive torque required to operate the shake correction mechanism. This resolves the contradiction between maintaining reliable swing functionality and minimizing the driving force needed.
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 stable and efficient shake correction of the optical module by reducing the contact area and drive torque, thereby improving the design flexibility and manufacturing simplicity of the optical unit.
Implementation Method 1
The swing mechanism includes a protruded spherical portion and a recessed spherical portion that is larger in radius of curvature than the protruded spherical portion
Data Source
AI summary
An optical unit with a shake correction function has a shake correction function for correcting a shake of an optical module. The optical unit with a shake correction function includes: a movable body including the optical module; a fixed body disposed outward of the movable body in a radial direction with respect to an optical axis of the optical module; and a support part disposed between the movable body and the fixed body in the radial direction and structured to support the movable body such that the movable body is swingable relative to the fixed body. The movable body and the support part or the support part and the fixed body have, in a pair, a swing mechanism structured to allow the movable body to swing relative to the fixed body. The swing mechanism includes a protruded spherical portion and a recessed spherical portion that is larger in radius of curvature than the protruded spherical portion.