Coil Device Cover Load Distribution via Peripheral Fixing Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless power transfer coil devices, load concentration occurs in the cover due to the gravitational pull and weight of internal components, leading to potential deformation and inadequate load distribution to the base.
Innovation Solution
A coil device design featuring a fixing member with a first fixing portion along the cover's outer periphery, which disperses the load by being in linear or planar contact, and additional features such as a belt shape, hooking portions, and inner fixing portions to ensure even load transmission to the base, thereby suppressing load concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a spacer is provided in the cover to support the coil, then the coil can be held in position, but load concentration occurs in the cover at the spacer location
Solution Approach 1:
The invention transitions from point-contact support (spacer) to line-contact support (fixing member along the periphery). By extending the support structure from a two-dimensional plane element to a one-dimensional line element distributed along the cover periphery, the load is distributed across multiple contact points rather than concentrated at a single spacer location, thereby reducing stress while maintaining coil positioning stability
2Device complexity
If the cover supports the interior part alone, then the structure is simple, but the cover deforms under gravitational load
Solution Approach 1:
The support function is segmented between two components: the cover provides positioning and the base provides load-bearing support. The fixing member acts as a load transmission element that divides the gravitational load from the coil between the cover (for positioning) and the base (for strength), preventing cover deformation while maintaining structural simplicity through functional division
3Stress or pressure
If a fixing member is added to transmit load to the base, then load concentration is reduced, but the device complexity increases
Solution Approach 1:
The fixing member serves multiple functions simultaneously: it transmits load from the cover to the base, positions the coil assembly, and provides structural reinforcement. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved load distribution and cover protection
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A coil device (10) includes a coil portion (T) including at least a coil (12), a housing (C) including a base (15) disposed on a side of a first surface (T1) of the coil portion (T) and a cover (11) disposed on a side of a second surface (T2) of the coil portion (T) and accommodating the coil portion (T) in an internal space (S) formed by the base (15) and the cover (11), and a fixing member (16) fixing the cover (11) to the base (15). The fixing member (16) includes a first fixing portion (160) disposed along at least the cover (11) on a first outer periphery (R1) of the housing (C) surrounding the base (15) and the cover (11).