Optical Unit Shake Correction Axis Alignment
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Solution Overview
Problem
Existing optical units with shake correction functions face issues where the turning axis of the movable body deviates from the optical axis when the optical module is turned around the first or second axis, leading to ineffective shake correction.
Innovation Solution
The optical unit incorporates a turning support mechanism that is turnably supported around the optical axis by a gimbal mechanism, ensuring the turning axis coincides with the optical axis, and includes a reinforcement member to prevent deformation of the gimbal frame, allowing the movable body to be accurately turned around the optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical module is turned around the first axis or around the second axis, then the shake correction function can operate, but the turning axis of the movable body deviates from the optical axis
Solution Approach 1:
The patent divides the support structure into separate functional components: the gimbal mechanism handles rotation around the first and second axes, while the turning support mechanism independently manages rotation around the optical axis. This segmentation allows each mechanism to operate without interfering with the alignment of the other, preventing the deviation problem.
Solution Approach 2:
The patent implements a nested structure where the turning support mechanism (supporting rotation around the optical axis) is positioned within the gimbal mechanism (supporting rotation around the first and second axes). The movable body is supported by the turning support mechanism, which in turn is supported by the gimbal mechanism, creating a hierarchical nested arrangement that maintains precise alignment.
2Adaptability or versatility
If the movable body is turned around the first axis or around the second axis, then the gimbal mechanism can function, but the turning axis deviates causing the rolling correction to fail
Solution Approach 1:
The patent separates the rolling correction function (handled by the turning support mechanism around the optical axis) from the pitching and yawing correction functions (handled by the gimbal mechanism around the first and second axes). This functional segmentation ensures that operations in one subsystem do not compromise the accuracy of another.
Solution Approach 2:
The turning support mechanism acts as an intermediary between the gimbal mechanism and the movable body. It receives rotational inputs from the gimbal mechanism while maintaining the optical axis alignment, thereby mediating the interaction between the two mechanisms and preventing deviation-induced errors in rolling correction.
3Ease of operation
If the plate holder is made flexible to allow turning, then the gimbal mechanism can operate, but the support members may separate under load
Solution Approach 1:
The patent applies local reinforcement to the plate holder at critical stress points, particularly at the first reinforcement position where the first support member connects to the gimbal frame. This localized strengthening allows the plate holder to remain flexible enough for turning operations while preventing separation at the connection point under load.
Solution Approach 2:
The reinforcement structure is designed in advance to preemptively counteract the separation force that would occur during operation. By providing structural reinforcement at the first support member connection point before any load is applied, the design prevents separation rather than reacting to it after failure occurs.
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 ensures precise alignment of the turning axis with the optical axis, enabling effective shake correction even when the movable body is turned around the first or second axis, thereby preventing separation of the support members and maintaining turnable support of the plate holder by the gimbal frame.
Implementation Method 1
a first concave curved face which is provided in the plate holder and is turnably brought into contact with a tip end of the first support member
Implementation Method 2
A reinforcement member is fixed to the gimbal frame so that a portion of the gimbal frame where the first axis is passed is reinforced
Implementation Method 3
a shake correction magnetic drive mechanism structured to turn the movable body around the first axis and around the second axis
Implementation Method 4
a rolling correction magnetic drive mechanism structured to turn the movable body around the optical axis
Data Source
AI summary
An optical unit with a shake correction function includes a turning support mechanism structured to turnably support a movable body having a lens around an optical axis, and a gimbal mechanism structured to turnably support the turning support mechanism. The gimbal mechanism includes a gimbal frame and a first connection mechanism which turnably connects a plate holder with the gimbal frame around a first axis, and the first connection mechanism includes a first support member which is protruded from the gimbal frame to a side of the plate holder on the first axis, and a first concave curved face which is provided in the plate holder and is turnably brought into contact with a tip end of the first support member. A reinforcement member is fixed to the gimbal frame so that a portion of the gimbal frame where the first axis is passed is reinforced.