Cylindrical Coil Attachment for Even Force Distribution
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Solution Overview
Problem
Existing attachment structures for coil devices concentrate fixing forces on specific bolts, leading to potential uneven distribution and local load application when subjected to torsion or external shocks, necessitating a solution for even force dispersion.
Innovation Solution
A cylindrical holding portion in the attachment structure engages a cylindrical engaged portion of the coil device over its entire circumference, allowing for even force distribution and secure attachment through screwing mechanisms, while also accommodating the coil device within a recessed area to prevent foreign material entry and reduce protrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bolts are used to fix the coil device, then the coil device can be securely attached, but the fixing force becomes concentrated on specific bolts creating point loads
Solution Approach 1:
The attachment structure divides the fixing force into multiple contact points around the circumference of the coil device. Instead of concentrating force on a single bolt, the structure creates multiple discrete contact zones that collectively distribute the load, preventing any single point from bearing excessive stress.
Solution Approach 2:
The attachment structure transitions from a point-based fixing method (bolts) to a circumferential distribution method. By extending the attachment interface around the entire circumference of the coil device, the fixing force is distributed across multiple spatial dimensions rather than being concentrated at discrete points.
2Reliability
If traditional attachment structures are used, then the coil device can be fixed, but load may be concentrated on and locally applied to particular bolts when torsion or external shock is applied
Solution Approach 1:
The attachment structure is designed to preemptively distribute and cushion external shocks and torsional forces before they can concentrate on any single point. The circumferential engagement creates a buffer zone that absorbs and disperses impact forces, protecting the coil device from sudden load concentration.
Solution Approach 2:
The attachment structure changes the physical parameters of force transmission by transitioning from discrete point contacts to continuous circumferential contact. This parameter change fundamentally alters how forces are transmitted, converting localized stress concentrations into distributed stress fields that are easier to withstand.
3Ease of operation
If the coil device protrudes from the attachment portion, then attachment is simpler, but the coil device is more exposed to external shocks and foreign materials
Solution Approach 1:
The coil device is nested within a recessed portion of the attachment structure, creating a protective cavity that shields the device from external environmental factors. This nesting arrangement allows the coil device to be securely housed while maintaining straightforward attachment through the circumferential engagement mechanism.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A fixing structure for a coil device according to an aspect of the disclosure is an attachment structure for a coil device which attaches a flat coil device including a coil portion to an attachment portion, the attachment structure including a cylindrical holding portion provided in the attachment portion to hold the coil device, and a cylindrical engaged portion provided in the coil device and engaged with the holding portion, wherein the holding portion and the engaged portion are disposed along an axis extending in a thickness direction of the coil device, and the engaged portion is engaged over an entire circumference thereof with the holding portion.