Optical Unit Gimbal Spherical Joint Impact Stability
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Solution Overview
Problem
Optical units with shake correction functions face issues where external impacts can cause the connecting state of spherical bodies in the connection mechanism to be released, leading to instability and potential failure in maintaining image stabilization.
Innovation Solution
The optical unit incorporates a gimbal mechanism with a connection mechanism that includes a spherical body fixed to a thrust receiving member and a support part with a concave curved face, where the thrust receiving member is held by a cut-out recessed part on the movable or fixed body, and protruded parts are positioned to prevent the support part from separating excessively, ensuring the connection remains secure even under impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a spherical body is fixed to a thrust receiving member by welding and the thrust receiving member is held by the movable body, then material selection freedom is improved, but the connecting state may be released due to external impacts
Solution Approach 1:
The invention adds a new spatial dimension to the connection structure by introducing protruded parts that extend in the optical axis direction beyond the spherical body. This dimensional extension creates additional engagement points that prevent separation in the direction where impacts typically occur, thereby maintaining connection reliability while preserving material selection freedom.
Solution Approach 2:
The protruded parts act as intermediary elements between the spherical body and the holding part. These intermediaries provide additional contact surfaces and mechanical interlocking features that enhance the connection stability without interfering with the welding process or material selection between the spherical body and thrust receiving member.
2Device complexity
If a spherical body is directly welded to the movable body, then the connection is simple, but material selection is restricted and the connecting state may be released under impact
Solution Approach 1:
The invention segments the connection structure into distinct functional components: the spherical body for rotation, the thrust receiving member for force transmission, and the protruded parts for positional constraint. This segmentation allows each component to be optimized for its specific function and enables greater material selection freedom while maintaining structural simplicity.
3Ease of operation
If the support part is designed to allow spherical body rotation, then shake correction function is achieved, but the support part may separate excessively under external impact
Solution Approach 1:
The invention introduces asymmetry in the connection geometry by providing protruded parts that extend asymmetrically in the optical axis direction beyond the spherical body. This asymmetric extension creates a mechanical stop that prevents excessive separation in the impact direction while maintaining rotational freedom, thereby achieving both ease of operation and positional stability.
Data Source
AI summary
An optical unit with a shake correction function includes a gimbal mechanism swingably supporting a movable body and including a connection mechanism including a spherical body and a support part contacted with the spherical body. The movable body includes a holding part holding a gimbal frame receiving member including a plate part fixed with the spherical body and a pair of protruded parts protruded to the support part side. The holding part is formed in a cut-out recessed part including a rear wall face, a pair of side wall faces, and a bottom wall face. When viewed in the optical axis direction, a pair of the protruded parts overlaps the support part. The movable body includes a facing wall part facing a pair of the protruded parts, and a separated distance between the facing wall part and the protruded parts is narrower than a thickness of the support part.