Rotation Angle Detection Device Magnet Retention Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotation angle detection devices for automobiles require individual holders for magnet installation, increasing manufacturing costs and complexity.
Innovation Solution
The device incorporates a first accommodation portion with a support portion for one surface of the magnet and a retention portion for the other surface, allowing the magnet to be press-fitted and retained between these portions, eliminating the need for separate holders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual holders are used for magnet installation, then the magnet can be retained and fixed, but the manufacturing cost increases and the device complexity increases
Solution Approach 1:
The holder is merged with the detection body by forming the holder as an integral part of the detection body through injection molding. This eliminates the need for separate holder components and their associated fastening operations, thereby reducing device complexity while maintaining magnet retention functionality.
Solution Approach 2:
The detection body is given multiple functions: it serves both as the structural component that rotates with the steering wheel and as the holder that retains the magnet. This multi-functionality reduces the total number of components needed in the system.
2Reliability
If individual holders are used for magnet installation, then the magnet can be retained and fixed, but the manufacturing cost increases
Solution Approach 1:
The holder and detection body are combined into a single integrated component manufactured in one injection molding process. This eliminates the need for separate manufacturing and assembly steps for the holder, significantly improving ease of manufacture and reducing production costs.
3Reliability
If holders are used for magnet installation, then the magnet can be retained and fixed, but the installation process becomes more time-consuming and labor-intensive
Solution Approach 1:
By integrating the holder into the detection body, the magnet installation becomes a single-step operation during detection body manufacturing. This eliminates time-consuming separate holder installation steps and labor-intensive fastening operations, thereby improving productivity.
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 enables easy and reliable magnet installation in a simple setup, reducing manufacturing costs and simplifying the installation process.
Implementation Method 1
a first magnet installed in a first accommodation portion which is provided in a center of the first detection body, and a first magnetism detection element arranged so as to face the first magnet
Data Source
AI summary
The present invention relates to a rotation angle detection device mainly used for rotation angle detection of a steering wheel of an automobile and the like.In the rotation angle detection device of the present invention, support portions for supporting lower surfaces of magnets and retention portions for retaining upper surfaces of the magnets are provided in respective accommodation portions of first and second detection bodies. The magnets are turned in the accommodation portions, and the magnets are press-fitted into lower surfaces of the retention portions so as to be retained and fixed between the support portions and the retention portions. Thereby, an inexpensive rotation angle detection device in which the magnets can be easily and reliably installed in the detection bodies with a simple configuration without individually using holders can be realized.