Sensor Maintaining Member with Orthogonal Alignment for Compact Assembly
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Solution Overview
Problem
Existing sensor units face challenges in accurately positioning and reducing the size of sensor devices mounted on circuit boards, leading to potential detection accuracy issues due to inclined detection axes and increased size when accommodated in casings.
Innovation Solution
A maintaining member with orthogonal alignment portions and a concave structure allows for precise and stable positioning of modules, utilizing point-symmetrical regions and protrusions/hole portions for secure mounting, and a filler to suppress vibration, enabling accurate and compact sensor module assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor devices are accommodated in a casing, then the sensor devices are protected and mounted, but the size of the sensor devices increases
Solution Approach 1:
The casing is divided into a maintaining member and a cover member that can be separated. The maintaining member provides the essential mounting and positioning functions, while the cover member protects the sensor devices. This segmentation allows for a more compact overall structure compared to a solid casing.
Solution Approach 2:
The sensor devices are nested within the maintaining member structure, which itself is nested within the cover member when assembled. This nested arrangement maximizes space utilization and reduces the overall volume of the sensor unit while maintaining protection.
2Ease of manufacture
If sensor devices are fixed in an inclined state, then the sensor devices can be mounted, but the detection axes become inclined and detection accuracy is lowered
Solution Approach 1:
The maintaining member features asymmetric alignment portions with specific geometries (protrusions and corresponding recesses) that enforce a unique, correct positioning of the sensor devices. This asymmetric design prevents inclined or incorrect mounting while maintaining ease of assembly through the alignment features.
Solution Approach 2:
The alignment portions are strategically positioned at specific locations on the maintaining member to provide localized guidance and constraint. The mounting surfaces have specific local geometries that ensure proper orientation of the detection axes, while other areas of the maintaining member provide general support and protection.
3Measurement precision
If a casing is designed to position sensor devices accurately, then detection accuracy is maintained, but the complexity of the casing increases
Solution Approach 1:
The positioning and alignment functions are extracted from the cover member and concentrated in the maintaining member. The alignment portions with their protrusions and recesses are integrated into the maintaining member structure, separating the positioning function from the protective function. This extraction simplifies the overall design by assigning specific functions to specific components.
Solution Approach 2:
The maintaining member serves multiple functions: it provides structural support, positions the sensor devices accurately through alignment portions, and protects the sensor devices when assembled with the cover member. This multi-functionality reduces the need for additional separate components, thereby reducing overall complexity.
Data Source
AI summary
A maintaining member includes alignment portions that determine a maintaining position of a module, in which each of the alignment portions has a mounting face to fix the module. When the maintaining member is partitioned into a first region to a fourth region by a first axis and a second axis that are orthogonal to each other in plan view with respect to the center of the maintaining member, the alignment portions are provided at the regions one by one.