Optical Unit Swing Mechanism for Camera Module Vibration Isolation
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Solution Overview
Problem
Conventional vibration isolator mechanisms for camera modules cannot effectively curb displacement of the optical axis due to their complex configuration and inability to restrict movement along specific axes.
Innovation Solution
An optical unit with a holder and case mechanism that includes a first and second swing mechanism, allowing the holder to swing with respect to the case along orthogonal axes while restricting movement along a third axis, thereby stabilizing the optical axis through a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional vibration isolator mechanism uses motors and gears to rotate two rotating shafts, then the camera module can be downsized, but the displacement of the optical axis cannot be curbed
Solution Approach 1:
The vibration isolator mechanism is segmented into three independent swing mechanisms, each responsible for stabilizing the optical axis along one of three orthogonal axes. This segmentation allows each mechanism to independently control movement in its specific direction, effectively curbing optical axis displacement while maintaining a compact camera module design.
Solution Approach 2:
Each swing mechanism is designed with specific local characteristics - the first swing mechanism operates along the first axis direction, the second along the second axis direction, and the third along the third axis direction. This local quality approach ensures that each mechanism optimally stabilizes the optical axis in its designated direction without interfering with other axes.
2Device complexity
If a simple holder configuration is used, then the device complexity is reduced, but the displacement of the optical axis cannot be curbed
Solution Approach 1:
The holder configuration is segmented into multiple functional components: the holder body, first protrusion with first recess, second protrusion with second recess, and three swing mechanisms. This segmentation allows each component to perform its specific function while collectively achieving optical axis stabilization without excessive complexity.
Solution Approach 2:
The protrusions and recesses act as intermediary elements between the holder and the swing mechanisms. These intermediaries enable the swing mechanisms to be properly integrated into the holder structure, allowing optical axis stabilization while maintaining reasonable device complexity through standardized connection interfaces.
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 optical unit achieves effective stabilization of the optical axis with a reduced camera module size, preventing image blur caused by camera shake while maintaining a compact design.
Implementation Method 1
an optical element with a reflecting surface that reflects light in a first axis direction
Data Source
AI summary
In an optical unit, a first swing mechanism swings a holder with reference to the y-axis direction, and a second swing mechanism swings the holder with reference to the z-axis direction. A case has a first recess that accommodates at least a part of a first protrusion of the holder and a second recess that accommodates at least a part of a second protrusion of the holder. The first recess has a first side surface located on one side in the y-axis direction of the first protrusion, a second side surface located on the other side in the y-axis direction of the first protrusion, and a bottom surface. The second recess has a first side surface located on one side in the y-axis direction of the second protrusion, a second side surface located on the other side in the y-axis direction of the second protrusion, and a bottom surface.