Wireless Earphone Magnetic Field Control for Easy Removal
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Solution Overview
Problem
Current wireless earphones with magnetic attraction charging mechanisms can be inconvenient to remove from charging boxes, as they often require force, which may damage the earpieces, and the high residual magnetization increases the weight and complexity of the device.
Innovation Solution
Incorporating a charging box open/close-state sensor, an earpiece attitude sensor, and a magnetic-field control circuit that adjusts the magnetic field based on the charging box state and earpiece orientation to facilitate easy removal and prevent damage, using sensors like infrared or pressure sensors and a spiral coil with a reverse circuit to control the magnetic attraction or repulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If magnets with relatively high residual magnetization are filled in the earpiece and charging box to ensure magnetic attraction effect, then the magnetic attraction effect is improved, but the weight of the complete machine increases
Solution Approach 1:
The patent applies dynamics by making the magnetic field controllable rather than static. The magnetic field control circuit dynamically adjusts the magnetic field strength based on sensor inputs (open/close state, earpiece attitude) to provide magnetic attraction only when needed for charging, eliminating the need for permanently strong magnets that would increase weight.
Solution Approach 2:
The patent changes the parameter of magnetic field strength from fixed (permanent magnets) to variable (electromagnetic control). By using a magnetic field control circuit that can adjust the magnetic field intensity based on operational conditions, the system achieves strong magnetic attraction during charging without requiring heavy permanent magnets with high residual magnetization.
2Stability of the object's composition
If strong magnetic attraction is used to ensure the earpiece is held in the charging box, then the charging stability is improved, but it becomes inconvenient for users to take the earpiece out
Solution Approach 1:
The system dynamically adjusts magnetic field strength based on the charging box state. When the box is closed and earpiece is detected in correct position, strong magnetic attraction provides stable charging. When the box is opened or earpiece attitude changes, the magnetic field is reduced or eliminated, allowing easy removal without force.
Solution Approach 2:
The patent implements feedback through sensors that detect the charging box open/close state and earpiece attitude. This feedback information is used by the magnetic field control circuit to automatically adjust the magnetic field strength, creating a closed-loop control system that balances charging stability with ease of removal.
3Reliability
If magnetic attraction mode is used to accommodate the earpiece in the charging box, then the charging function is achieved, but the exposed part is smooth and inconvenient to grip for removal
Solution Approach 1:
The patent replaces the mechanical gripping problem with an electromagnetic solution. Instead of relying on mechanical friction or rough surfaces for gripping, the system uses controlled magnetic fields to hold the earpiece during charging, then releases the magnetic hold to facilitate easy removal, eliminating the need for mechanical grip features.
4Ease of operation
If force is applied to remove the earpiece from the charging box, then the earpiece can be taken out, but the earpiece may be damaged
Solution Approach 1:
The system applies preliminary anti-action by detecting when the user intends to remove the earpiece (through open/close state or attitude changes) and preemptively reducing or eliminating the magnetic field. This prevents the strong magnetic attraction from causing damage during removal, allowing users to take out the earpiece without applying force that could cause damage.
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
Enables convenient removal of earpieces from the charging box without force, reducing the risk of damage and improving user experience by optimizing the magnetic field control based on sensor inputs.
Implementation Method 1
a magnetic-field control circuit 150 disposed in the charging box 110. The magnetic-field control circuit 150 is configured to control, according to results detected by the charging box open/closed state sensor 130 and the earpiece attitude sensor 140, whether the earpiece 120 is suspended from the charging box 110
Implementation Method 2
a true wireless stereo (TWS) earpiece is accommodated in a charging box mainly in a magnetic attraction mode. That is, permanent magnets are disposed in the earpiece and the charging box, thereby ensuring the earpiece is attracted in the charging box by magnetic attraction
Implementation Method 3
using sensors like infrared or pressure sensors
Implementation Method 4
using sensors like infrared or pressure sensors
Implementation Method 5
a spiral coil with a reverse circuit to control the magnetic attraction or repulsion
Data Source
AI summary
Provided are a wireless earphone and a method for controlling a wireless earphone. The wireless earphone includes a charging box and an earpiece placed in the charging box. A charging box open/closed-state sensor, an earpiece attitude sensor and a magnetic-field control circuit are disposed in the charging box. The charging box open/close-state sensor is configured to detect an open state of the charging box or a closed state of the charging box. The earpiece attitude sensor is configured to detect an orientation attitude of the earpiece in the charging box. The magnetic-field control circuit controls, according to results detected by the charging box open/closed-state sensor and the earpiece attitude sensor, whether the earpiece is suspended from the charging box.