Slim Flat Coil Module Bending Resistance via Enclosure

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Solution Overview

Problem

Slim coil modules face reduced resistance to bending and strength, and are difficult to integrate into charged appliances due to exposed designs.

Innovation Solution

Enclosing the flat coil within a case to enhance bending resistance and strength, and assembling it into a module for simplified integration into appliances.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If the flat coil is made slim to reduce apparatus thickness, then the thickness is reduced, but resistance to bending and strength are reduced

Engineering Contradiction:

ImprovethicknessVSAvoidresistance to bending and strength

Core Design Contradiction:

Length of stationary objectVSStrength

Solution Approach 1:

The patent combines the slim flat coil with a flexible printed circuit board (FPC) and encloses it within a case structure. This composite construction allows the coil to maintain its slim profile while the FPC and case provide the necessary mechanical strength and bending resistance, resolving the contradiction between thinness and structural integrity.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent uses a flexible printed circuit board as a substrate for the flat coil. The FPC provides a thin, flexible support structure that maintains the slim thickness of the apparatus while offering sufficient mechanical strength and resistance to bending, allowing the coil to be both thin and structurally sound.

Inventive Principle:

Principle #30Flexible shells and thin films

2Device complexity

If the flat coil is made exposed to minimize structure, then the structure is simplified, but incorporation into charged appliance becomes complicated

Engineering Contradiction:

ImprovestructureVSAvoidincorporation process

Core Design Contradiction:

Device complexityVSEase of manufacture

Solution Approach 1:

The patent divides the flat coil assembly into a separate module that can be independently manufactured and then incorporated into the charged appliance. By segmenting the coil from the final product assembly, the incorporation process becomes simpler and more standardized, even though the module itself has a structured enclosure.

Inventive Principle:

Principle #1Segmentation

3Strength

If the flat coil is enclosed in a case to improve strength, then resistance to bending and strength are improved, but device complexity increases

Engineering Contradiction:

Improveresistance to bending and strengthVSAvoidstructure

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The case enclosing the flat coil serves multiple functions: it provides mechanical strength and bending resistance, protects the coil, and acts as a modular unit for easy incorporation into appliances. By making the case multi-functional, the patent reduces overall device complexity while maintaining improved strength.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP1998342B1Coil module apparatus

Publication Date: 2018.01.10 SEIKO EPSON CORP

Figure 1
Figure 2~3
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AI summary

A coil module apparatus is provided. The coil module apparatus includes a flat coil (3), a circuit board (4), a magnetic sheet (7), connection terminals (10), and a case (1,2). The flat coil has a flat shape. The circuit board is used for the flat coil. The magnetic sheet is provided so as to cover one surface portion of the flat coil. The connection terminals are provided for connecting the flat coil and the circuit board. The case encloses the flat coil, the circuit board, and the magnetic sheet and encloses the connection terminals so that the connection terminals are partly exposed.