Rotary Position Sensor Cover with Protective Projection
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Solution Overview
Problem
Conventional rotary position detection devices risk damaging IC packages due to contact with opposed components during assembly, storage, or transportation, as they are not adequately protected from mechanical stress and external impacts.
Innovation Solution
A rotary position detection device design featuring a cover member with a tubular portion and a projection that surrounds the magnetic flux emission unit, supporting the IC package in a way that the projection contacts potential opposing components instead of the IC package, thereby protecting it from damage during assembly, storage, and transportation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the IC package is positioned to be supported by the support portion, then the magnetism detection element can send signals properly, but the IC package may contact opposed components and break during assembly, storage, or transportation
Solution Approach 1:
The projection acts as an intermediary protective element between the IC package and opposed components. It is positioned to contact opposing surfaces first, absorbing mechanical stresses and preventing direct contact between the IC package and potentially damaging components during assembly, storage, or transportation.
Solution Approach 2:
The projection provides beforehand protection by being positioned in advance to intercept and absorb mechanical impacts before they can reach the IC package. This pre-positioned protective structure cushions the IC package against damage during handling, assembly, and storage operations.
2Device complexity
If the cover member is mounted to surround the magnetic flux emission unit, then the structure is compact and functional, but the IC package lacks protection from external impacts and contact with opposed components
Solution Approach 1:
The protective function is segmented from the main cover member body by adding a separate projection element. This segmentation allows the cover member to maintain its compact structural design while the projection specifically addresses the protection need, providing targeted protection without complicating the overall cover member structure.
3Ease of operation
If the support portion extends toward the opening of the tubular portion, then the IC package is accessible for signal detection, but the IC package is exposed to damage from contact with upper surfaces or other components during storage and conveyance
Solution Approach 1:
The projection extends in a different spatial dimension relative to the IC package position, creating a protective barrier that does not interfere with the IC package's accessibility for signal detection. This dimensional arrangement allows the IC package to remain accessible while being protected from above by the projection.
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 design effectively prevents IC package breakage by redirecting contact forces away from the IC package, ensuring its integrity during mounting, storage, and handling, while also reducing material usage and manufacturing costs through optimized projection shapes.
Implementation Method 1
a magnetism detection element configured to send a signal according to change in a direction of a magnetic flux, which is caused when the magnetic flux emission unit rotates
Data Source
AI summary
A magnetic flux emission unit is mounted on a detection object and rotatable integrally with the detection object. An IC package includes a magnetism detection element, which sends a signal according to change in a magnetic flux caused when the magnetic flux emission unit rotates. A cover member includes a bottom portion and a tubular portion. The tubular portion is extended from an outer periphery of the bottom portion. The cover member surrounds the magnetic flux emission unit with the bottom portion when mounted to the housing. A support portion is projected from the bottom portion toward an opening of the tubular portion to support the IC package. A projection is projected toward the opening from the bottom portion to at least a position corresponding to the magnetism detection element.