Magnetic Detection Module Cylindrical Guide for Housing Insertion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional detection devices face challenges in preventing interference between a sensor unit protruding from the magnetic detection module and housing members during insertion, especially when the housing has a cylindrical mounting hole, leading to potential damage or changes in sensor characteristics due to misalignment or tilt.
Innovation Solution
The detection device incorporates a magnetic detection module with a cylinder portion and sensor unit designed to fit within a housing having a large and small diameter hole configuration, where the cylinder portion is integrally formed or composed of a cap, ensuring a minimum distance between the sensor unit and ring portions to prevent interference, and utilizing a sealing member for waterproof applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the magnetic detection module is inserted into a housing with a cylindrical mounting hole, then the module can be mounted in the housing, but misalignment or tilt during insertion may occur causing sensor interference with housing members
Solution Approach 1:
A cap is introduced as an intermediary component between the magnetic detection module and the housing. The cap includes a cap insertion portion that fits into the mounting hole, providing guidance and support during insertion. This intermediary structure prevents misalignment and tilt, ensuring the sensor unit maintains proper distance from housing members while enabling easy insertion.
2Reliability
If the sensor unit protrudes from the magnetic detection module to detect magnetic flux, then detection function is achieved, but interference with housing members may occur during insertion
Solution Approach 1:
The cap is assembled to the magnetic detection module in advance, with the cap insertion portion extending from the cap. This preliminary assembly creates a protective structure that prevents the sensor unit from interfering with housing members during insertion. The cap insertion portion acts as a leading element that guides the module into proper position before the sensor unit enters the detection zone, thereby preventing harmful interference.
3Reliability
If a seal member is added to prevent water entry in waterproof housings, then waterproofing is achieved, but production complexity and cost increase
Solution Approach 1:
The seal member is integrated with the cap structure, combining the sealing function with the existing protective cap. The seal member fits into a groove on the cap or housing, creating a unified assembly that provides both mechanical protection and waterproofing. This merging approach eliminates the need for separate sealing components and assembly steps, reducing production complexity while maintaining waterproofing reliability.
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 effectively suppresses misalignment and inclination issues during module insertion, preventing sensor interference with housing members and allowing for secure attachment to both waterproof and non-waterproof housings with reduced production costs and complexity.
Implementation Method 1
a magnetic detection module mounted in the mounting hole in the housing and configured to detect the magnetic flux transmitted from the yoke by one or more magnetic sensors housed in a case
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A detection device comprises a housing (402) including a mounting hole (42) provided inside with a set of yokes (31, 32; and a magnetic detection module (903, 904) mounted in the mounting hole and configured to detect the magnetic flux transmitted from a set of yokes by one or more magnetic sensors (71, 72) housed in a case (501, 504), wherein the set of yokes has ring portions (35, 36) that face each other and form a magnetic circuit, the mounting hole has a large hole (426) formed on an opening side and a small hole (425) formed in a back of the large hole, the magnetic detection module faces an inner wall of the mounting hole and includes a cylindrical portion (813, 814) having a large shaft portion (866) inserted into the large hole and a small shaft portion (865) inserted into the small hole (813, 814), and a sensor unit (840) in which the magnetic sensor is housed and protrudes from the tip end surface of the cylindrical portion and is inserted between the ring portions of the set of yokes.