Magnetic Part Core Fixation via Recessed Support Member
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Solution Overview
Problem
The existing magnetic parts in electronic apparatuses, particularly those near engines in vehicles, face breakage due to external forces like vibration and shock, as the brittle ferrite magnetic substance cores are prone to bending or shearing stress when fixed using conventional methods, leading to performance deterioration and increased manufacturing costs.
Innovation Solution
A magnetic part design featuring a core with column portions that are pressed against a support member with a recessed surface, ensuring no gap between the core and support member, thus minimizing bending or shearing stress, and using leaf springs to apply forces directly on column portions, eliminating the need for additional adhesion or bonding for reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a core is pressed to a support member using a fixing member, then the core is fixed reliably, but a large bending stress or shearing stress is applied to the core causing breakage
Solution Approach 1:
The support member has a recessed surface at the contact position with the core, creating a localized structural feature that accommodates the core's column portion. This local modification allows the pressing force to be applied directly to the column portion without creating bending moments, thus fixing the core reliably while preventing breakage.
2Reliability
If additional adhesion or bonding is used to reinforce fixing strength, then the core is fixed more securely, but the manufacturing complexity and costs increase
Solution Approach 1:
The invention extracts the essential fixation function from the complex combination of mechanical fastening plus adhesion/bonding, and implements it through a simple recessed surface structure on the support member. This eliminates the need for additional adhesion or bonding processes while maintaining secure fixation, thereby reducing manufacturing complexity and costs.
3Ease of manufacture
If a gap exists between the core and support member, then the core is easier to install, but large bending stress or shearing stress is applied to the core
Solution Approach 1:
The recessed surface on the support member changes the geometric parameter of the contact interface, creating a space that accommodates the core's column portion. This parameter change ensures that the core contacts the support member at the correct position without requiring precise dimensional control, making installation easier while preventing bending stress.
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 effectively prevents core breakage by aligning the pressing and reaction forces, reducing manufacturing complexity and costs, while ensuring reliable fixation and heat transfer through a heat radiator support member.
Implementation Method 1
a coil that generates a magnetic flux when a current flows through the coil
Implementation Method 2
a support member that supports the core... in a case where a temperature of the core exceeds a limit temperature due to the heat, the core does not function as a magnetic substance, and enters a state called thermal runaway
Data Source
AI summary
A magnetic part including: a coil that generates a magnetic flux when a current flows through the coil; a core that is formed of a magnetic substance that forms a magnetic path of the magnetic flux; a support member that supports the core; and a fixing member that fixes the core to the support member. The core includes a column portion that is vertically provided with respect to a surface where the core is in contact with the support member. The fixing member presses the column portion of the core against the support member. The support member has a recess in a portion of a facing surface that faces the core, where the portion of a facing surface does not face the column portion.