Optical Device Fixing Structure for High Density Mounting
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Solution Overview
Problem
Existing optical devices, such as those with Integrable Tunable Laser Assemblies (ITLA), face challenges in reducing size while maintaining functionality, particularly in reducing the size of printed wiring boards to increase communication capacity and density.
Innovation Solution
The optical device design includes an optical module with a printed wiring board fixed between two plate-shaped members using screw members, reducing the number of fixing structures and increasing the mounting area by minimizing the area occupied by these structures, thus allowing for a larger printed wiring board and improved durability against vibration and impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of fixing structures is increased to improve durability against vibration and impact, then the mounting area for electronic components is reduced
Solution Approach 1:
The fixing structure is divided into two independent parts: a first fixing member that secures the printed wiring board to the first plate-shaped member, and a second fixing member that secures the optical module to the second plate-shaped member. This segmentation allows each fixing member to be optimized for its specific function without interfering with the mounting area, as they operate independently on different planes and components.
Solution Approach 2:
The fixing structures are arranged in different spatial dimensions and planes. The first fixing member operates in the plane of the printed wiring board, while the second fixing member operates in the plane of the optical module. This dimensional separation allows both fixing structures to coexist without competing for the same mounting space, effectively increasing the available mounting area while maintaining durability.
2Volume of stationary object
If the size of the optical device is reduced to increase communication capacity and density, then the area occupied by fixing structures becomes a larger proportion of the total area
Solution Approach 1:
The first and second plate-shaped members are integrated into a unified housing structure that accommodates both the printed wiring board and optical module. This merging of the support structures allows the fixing members to be positioned more efficiently within the compact overall form, reducing the proportion of area occupied by fixing structures relative to the total device volume.
Solution Approach 2:
By utilizing vertical stacking and different spatial planes for the fixing structures, the patent maximizes the use of three-dimensional space within the compact device footprint. This allows the fixing structures to occupy minimal horizontal area while still providing adequate durability, effectively reducing the proportion of total area consumed by fixing components.
Data Source
AI summary
An optical device includes: an optical module provided with an electrical pin; a printed wiring board that is connected to the electrical pin of the optical module, on which a control circuit for controlling the optical module is mounted, and on which an opening is formed; a first plate-shaped member to which the printed wiring board is fixed; a first fixing member that is inserted into the opening of the printed wiring board, and that fixes the printed wiring board with the first plate-shaped member; a second plate-shaped member that is disposed such that the printed wiring board is interposed between the second plate-shaped member and the first plate-shaped member; and a second fixing member that fixes the first fixing member with the second plate-shaped member such that the optical module is retained between the first plate-shaped member and the second plate-shaped member.