Wiring Member Coaxial Alignment for Optical Shake Correction
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Solution Overview
Problem
Conventional optical units with shake correction functions face challenges in aligning magnetic detection sensors, coils, and magnetic members, leading to insufficient alignment, decreased drive torque, and position detection accuracy, resulting in unstable shake correction performance.
Innovation Solution
A wiring member with multiple mounting faces where magnetic detection sensors, magnetic members, and coils are fixed, ensuring coaxial alignment of their centers, facilitating easier assembly and alignment with magnets, thereby stabilizing the shake correction function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If magnetic detection sensors, coils, and magnetic members are assembled separately with conventional structures, then assembly flexibility is maintained, but alignment precision deteriorates causing insufficient alignment and decreased drive torque
Solution Approach 1:
The patent merges the magnetic detection sensor, coil, and magnetic member onto a single common support structure (the wiring member or substrate). This integration ensures that all three components share the same reference plane and alignment features, eliminating cumulative alignment errors that occur during separate assembly. The common support structure provides unified positioning features that guarantee coaxial alignment of all components, directly resolving the alignment precision issue while the modular wiring member design keeps the overall device complexity manageable.
2Reliability
If components are tightly aligned to improve drive torque, then shake correction performance improves, but assembly difficulty increases
Solution Approach 1:
The patent implements preliminary alignment by pre-positioning the magnetic detection sensor, coil, and magnetic member on the common support structure during the wiring member fabrication process. Alignment features such as positioning holes, alignment marks, or precision-machined mounting surfaces are built into the support structure beforehand. This preliminary action ensures that when components are assembled, they automatically achieve the required tight alignment without requiring complex adjustment procedures during final assembly, thus improving shake correction performance while maintaining assembly ease.
3Measurement precision
If separate assembly of components is used, then manufacturing flexibility is maintained, but position detection accuracy deteriorates due to assembly errors
Solution Approach 1:
The patent segments the system into a modular wiring member assembly (containing the sensor, coil, and magnetic member on a common support) and the main optical unit. The wiring member itself can be manufactured using flexible PCB or flexible substrate technologies, maintaining manufacturing flexibility. However, the critical alignment-sensitive components are integrated onto this flexible carrier as a unified sub-assembly, ensuring that position detection accuracy is not compromised by separate assembly errors. This segmentation allows the flexible manufacturing of the carrier while guaranteeing precise relative positioning of the mounted components.
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 aligned components on the wiring member enhance the alignment of magnetic detection sensors, magnetic members, and coils, improving drive torque and position detection precision, ensuring stable shake correction performance and simplifying assembly.
Implementation Method 1
a magnetic detection sensor that detects a magnetic field of the magnet
Implementation Method 2
a swinging magnetic drive mechanism 6 that applies a driving force by the magnetic attractive force by the magnets 26 and the coils 62 being energized
Implementation Method 3
an attitude return mechanism 7 that returns the movable body 3 to the original position with the magnetic attractive force of the magnets 26 and the magnetic members 67
Data Source
AI summary
An optical unit having a shake correction function, includes a movable body including an optical module, a fixed body supporting the movable body in a swingable manner, a swing drive mechanism swinging the movable body relative to the fixed body and including a magnet and a coil, one of the magnet and the coil being fixed to the movable body, the other one of the magnet and the coil being fixed to the fixed body, a magnetic member returning the movable body to an original position, a magnetic detection sensor detecting a magnetic field of the magnet, and a wiring member being connected with the coil. The wiring member includes a mounting face on which the magnetic detection sensor, the magnetic member, and the coil are fixed. The centers of the magnetic detection sensor, the magnetic member, and the coil are coaxially fixed to the mounting face.