Optical Unit Shake Correction with Rolling 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 by a gimbal mechanism around intersecting axes, ensuring the turning axis of the movable body coincides with the optical axis, and includes shake correction and rolling correction magnetic drive mechanisms arranged in the circumferential direction 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 is activated, but the turning axis of the movable body deviates from the optical axis
Solution Approach 1:
The patent introduces a third degree of freedom by adding the rolling correction magnetic drive mechanism that rotates the movable body around the optical axis (third axis), complementing the existing two-axis gimbal mechanism. This three-dimensional rotational capability ensures that the turning axis coincides with the optical axis while maintaining shake correction functionality.
Solution Approach 2:
The patent introduces a rolling correction magnetic drive mechanism as an intermediary component between the gimbal mechanism and the optical module. This intermediary mechanism mediates the rotational motion to ensure the turning axis coincides with the optical axis by providing additional rolling correction capability around the optical axis.
2Manufacturing precision
If the rolling correction magnetic drive mechanism is arranged in the optical axis direction, then the axis alignment is improved, but the unit size increases
Solution Approach 1:
The patent merges the rolling correction magnetic drive mechanism with the existing gimbal mechanism structure, arranging both mechanisms in the circumferential direction around the optical axis. This consolidation allows the rolling correction mechanism to share the same spatial envelope as the gimbal mechanism, avoiding additional length in the optical axis direction while maintaining axis coincidence.
Solution Approach 2:
The patent repositions the rolling correction magnetic drive mechanism from the optical axis direction to the circumferential direction around the optical axis. This dimensional reconfiguration places the mechanism in the radial-circumferential plane rather than extending along the optical axis, thereby maintaining compactness in the optical axis direction while achieving proper axis alignment.
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 allows for effective shake correction by ensuring the movable body is turned around the optical axis when driven, while minimizing the unit's size in the optical axis direction compared to traditional arrangements.
Implementation Method 1
a shake correction magnetic drive mechanism structured to turn the movable body around the first axis and around the second axis
Implementation Method 2
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 movable body having a lens, a turning support mechanism structured to turnably support the movable body around an optical axis of the lens, a gimbal mechanism structured to turnably support the turning support mechanism around a first axis and around a second axis intersecting the optical axis, a fixed body which supports the movable body through the gimbal mechanism and the turning support mechanism, a shake correction magnetic drive mechanism structured to turn the movable body around the first axis and around the second axis, and a rolling correction magnetic drive mechanism structured to turn the movable body around the optical axis. The shake correction magnetic drive mechanism and the rolling correction magnetic drive mechanism are arranged in a circumferential direction around the optical axis.