Alternating Needle Electrode Pattern Prevents Proximity Effect
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Solution Overview
Problem
Skin care devices using high-frequency oscillation often experience a proximity effect, where high-frequency energy is deflected, leading to reduced skin improvement effects due to magnetic field cancellation between adjacent needle electrodes, particularly in monopolar types.
Innovation Solution
A needle tip design for skin care devices with a plurality of needle electrodes arranged in a specific alternating pattern, where a first group and a second group of electrodes are alternately applied with current, connected in parallel, and arranged in diagonal lines inclined at 45 degrees, preventing proximity effects by ensuring optimal energy distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple needle electrodes are arranged closely together in monopolar configuration, then high-frequency energy can be applied to deep skin portions, but magnetic field cancellation occurs between adjacent electrodes causing deflected current and proximity effect
Solution Approach 1:
The needle electrode is divided into multiple independent needle electrodes (first needle electrode, second needle electrode, etc.) arranged in specific spatial patterns. Each needle electrode operates independently with its own current path to the ground electrode, preventing magnetic field cancellation and proximity effect while enabling deep skin treatment through multiple insertion points
Solution Approach 2:
The needle electrodes are arranged in asymmetric spatial configurations (e.g., triangular arrangement, diagonal alignment at 45 degrees) rather than symmetric patterns. This asymmetric arrangement ensures that current paths from different needle electrodes to the ground electrode do not overlap or cancel each other magnetically, maintaining uniform current distribution while treating deep skin portions
2Temperature
If needle electrodes are inserted deep into skin for effective wrinkle and elasticity treatment, then thermal energy can be generated for collagen remodeling, but magnetic field interference causes deflected current reducing treatment precision
Solution Approach 1:
A ground electrode is introduced as an intermediary component that receives current from multiple needle electrodes separately. This ground electrode acts as a common reference point that prevents magnetic field cancellation between adjacent needle electrodes, ensuring that thermal energy is generated precisely at intended deep skin locations without current deflection
Solution Approach 2:
The system transitions from two-dimensional planar electrode arrangement to three-dimensional spatial configuration with needle electrodes inserted at different angles and depths into the skin. This dimensional change allows current paths to be spatially separated, preventing magnetic field interference while maintaining effective thermal energy generation for collagen remodeling
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 alternating oscillation of current between groups of needle electrodes effectively prevents the proximity effect, ensuring uniform high-frequency energy application and enhanced skin improvement outcomes.
Implementation Method 1
when a current is applied to the adjacent needle electrodes in the same direction, the magnetic field generated from each of the plurality of needle electrodes is cancelled (Magnetic field cancellation) between the adjacent needle electrodes
Implementation Method 2
as the high frequency is oscillated in the deep portion of the skin, damaged collagen and elastic fibers are removed, and new collagen and elastic fibers may be formed, due to thermal energy generated from the high-frequency oscillation
Data Source
AI summary
A needle tip mounted on a skin care device and the skin care device are provided to prevent a proximity effect. The needle tip includes a case, a holder disposed in the case and reciprocating in a vertical direction, and a plurality of needle electrodes disposed in the holder. A current is applied to the plurality of needle electrodes, and the plurality of needle electrodes include a first group of needle electrodes and a second group of needle electrodes, to which the current is applied at mutually different times.