Rotation Angle Sensor Lead Terminal Stress Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotation angle detecting sensors face stress issues on lead terminals due to thermal expansion and contraction of the support member, leading to potential breakage and reliability concerns.
Innovation Solution
A rotation angle detecting sensor design that allows the magnetism detecting member to move in the Y-direction with respect to the support member, reducing stress on the lead terminals and incorporating elastic engagement members and lock claws for secure positioning and movement regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the support member is rigidly fixed to the magnetism detecting member, then the structural stability is improved, but stress is applied to the lead terminals during thermal expansion and contraction, leading to potential breakage
Solution Approach 1:
The support member is designed with a movable portion that can move in the Y-direction relative to the magnetism detecting member. This dynamic structure allows the support member to accommodate thermal expansion and contraction without applying stress to the lead terminals, while still maintaining structural stability through the engagement between the movable portion and the magnetism detecting member.
2Stability of the object's composition
If the lead terminals are rigidly connected to the support member, then the electrical connection stability is improved, but the lead terminals are susceptible to breakage due to thermal stress
Solution Approach 1:
The movable portion of the support member is designed to move in the Y-direction, creating a dynamic connection that absorbs thermal stress. This allows the lead terminals to maintain stable electrical connections while preventing stress concentration that would lead to breakage.
3Manufacturing precision
If the support member is designed with engagement support portions and engaged portions, then the positioning precision is improved, but the device complexity increases
Solution Approach 1:
The support member is segmented into a fixed portion and a movable portion, with the movable portion containing the engagement support portions. This segmentation allows for precise positioning through the engagement between the movable portion and the magnetism detecting member, while keeping the overall structure manageable by separating functional elements.
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 design prevents lead terminal breakage and enhances the reliability of the sensor by accommodating thermal expansion and contraction, maintaining detection accuracy and simplifying manufacturing processes.
Implementation Method 1
a magnetism detecting member (12) for detecting a rotation angle of a rotary member
Implementation Method 2
when the support member undergoes thermal expansion and contraction in the Y-direction (longitudinal direction), stress is repeatedly applied to the lead terminals
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A rotation angle detecting sensor (10) has a sensor IC (12), a plurality of lead terminals (18), a support member (14), and a support structure. The sensor IC (12) detects a rotation angle of a rotary member. The plurality of lead terminals (18) extends in the Y-direction from the sensor IC (12). The support structure supports the sensor IC (12) so as to be movable in the Y-direction with respect to the support member (14).