Optical Device Coil Holding Member Window Section Alignment
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Solution Overview
Problem
The existing optical path control devices face stability issues due to the difficulty in positioning the air core coil and permanent magnet correctly, leading to potential contact and decreased stability during the swinging motion, which affects the optical path's stability and assembly efficiency.
Innovation Solution
The optical device incorporates a window section in the coil holding member to allow visualization of the air core coil's edge, enabling precise positioning to avoid contact with the permanent magnet, and includes a window section in the moving section to view the permanent magnet's edge, facilitating correct alignment and assembly, thereby enhancing stability and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a yoke made of soft magnetic material is used to support the permanent magnet and coil, then the magnetic circuit is improved, but the visibility of the coil and permanent magnet is reduced making positioning difficult
Solution Approach 1:
The yoke is divided into two separate parts: a first yoke supporting the permanent magnet and a second yoke supporting the coil. This segmentation allows each yoke to be optimized independently and enables the coil to be positioned with better visibility, avoiding contact during swinging while maintaining magnetic circuit performance.
2Device complexity
If the coil and permanent magnet are positioned close to each other to reduce device size, then the device complexity is reduced, but the risk of contact during swinging increases reducing stability
Solution Approach 1:
By separating the yoke into two parts, the coil and permanent magnet can be positioned closer for compactness while the separate support structures prevent contact during swinging motion, maintaining stability.
Solution Approach 2:
The first and second yokes act as intermediary support structures that maintain the positional relationship between the coil and permanent magnet, preventing direct contact while allowing close positioning for compact design.
3Reliability
If precise positioning of the coil and permanent magnet is implemented to prevent contact, then the optical path stability is improved, but the assembly time increases reducing productivity
Solution Approach 1:
The segmented yoke structure provides built-in positioning features that guide correct placement of the coil and permanent magnet, achieving precise positioning that ensures optical path stability while simplifying the assembly process.
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 increased stability of the optical path and reduces assembly time, improving the productivity of the optical path deflecting element by allowing for easier and accurate placement of the air core coil and permanent magnet, resulting in a higher resolution image display.
Implementation Method 1
an air core coil that is provided so as to face the moving section, and generates an electric field acting on the permanent magnet
Data Source
AI summary
An optical device includes: an optical section that includes a light-incident surface on which light is incident; a moving section that supports the optical section; a shaft section that swingably supports the moving section around a swing axis; a permanent magnet that is provided in the moving section; an air core coil that is provided so as to face the moving section, and generates an electric field acting on the permanent magnet; and a coil holding member that is provided on a side opposite to the permanent magnet of the air core coil, and holds the air core coil, wherein the coil holding member includes a window section, and wherein an edge section of the air core coil is viewable through the window section.