Movable Wireless Charging Coil Unit for Dual-Orientation Charging
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Solution Overview
Problem
Existing wireless charging solutions lack the ability to efficiently charge multiple devices in various orientations, such as flatbed and vertical positions, making them inconvenient for users with multiple devices and varying charging needs.
Innovation Solution
A wireless power transmission device with a movable coil unit that can switch between a laid and erected position, equipped with two coils and support members, allowing for charging in both flatbed and vertical orientations, and enabling simultaneous double-sided charging by adjusting the position and magnetic attraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wireless charger uses a fixed flatbed position for charging, then the charging structure is simple, but it cannot charge devices in vertical position or support multiple charging orientations
Solution Approach 1:
The patent applies the dynamics principle by making the coil unit movable between laid and erected positions through a hinge mechanism. This allows the charger to dynamically adjust its configuration to accommodate different charging orientations (flatbed and vertical positions), resolving the contradiction between charging adaptability and structural complexity
Solution Approach 2:
The patent implements universality by designing a single wireless charger that can perform multiple charging functions - charging devices in both flatbed and vertical positions, and supporting single or dual device charging. The movable coil unit enables one device to serve multiple charging purposes, eliminating the need for separate chargers for different orientations
2Productivity
If two coils are placed close together for simultaneous charging, then charging efficiency is improved, but magnetic interference between coils increases
Solution Approach 1:
The patent applies the intermediary principle by introducing a magnetic isolation structure (ferrite sheet or magnetic shielding material) positioned between the two coils. This intermediary element redirects and contains magnetic flux, preventing interference between adjacent coils while allowing both to operate at high power for fast simultaneous charging
Solution Approach 2:
The patent implements local quality by providing magnetic isolation only in the specific region between the two coils where interference occurs, rather than throughout the entire charger structure. The ferrite sheet is strategically positioned to address the local magnetic interference problem while maintaining overall charging efficiency
3Reliability
If support members are added to maintain device alignment, then charging stability is improved, but the device complexity increases
Solution Approach 1:
The patent applies the self-service principle by designing support members with magnetic attraction capability that automatically attract and hold devices in the correct charging position. The magnetic force self-adjusts to maintain optimal alignment between the device and coil, eliminating the need for complex mechanical adjustment mechanisms while ensuring charging stability
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
The device provides a highly convenient solution for charging multiple devices in different orientations, ensuring efficient and stable charging by preventing coil interference and maintaining alignment, thus enhancing user convenience and charging efficiency.
Implementation Method 1
a power transmission coil unit including a first spiral coil formed on a first surface of a multilayer substrate, a second spiral coil formed on a second surface on the opposite side of the first surface
Implementation Method 2
a magnetic isolation layer extending in a third direction between the first power transmission coil and the second power transmission coil
Data Source
AI summary
A wireless power transmission device is provided with a coil unit having first and second main surfaces and configured to be movable between a first position as a laid position of the first main surface and a second position as an erected position of the first main surface, a first coil housed in the coil unit so as to face the first main surface, and a first support member having a facing surface disposed separated from the first main surface by a first distance when the coil unit is at the second position.