China Neodymium And Ferrite Magnets Manufacturer & Supplier 
In both TWS and OWS earphones, permanent magnets, mainly rare earth neodymium magnets, are used. In order to ensure the stability, non loosening, and non detachment of the magnets, there are three common fixing methods.
1. Glue bonding
Use epoxy glue, UV glue, or instant dry glue to directly attach the magnet to the groove of the earphone or charging case housing. The advantage is that it can meet the bonding needs of different materials. Small area bonding has a fast initial curing speed, and UV glue has a short curing time, making it suitable for assembly line operations and improving production efficiency. In headphone assembly, the magnet and charging case are often fixed by adhesive to ensure that the magnet is stable and does not affect the overall waterproof performance. Applicable scenarios include charging compartment covers, Hall detection magnets, and single ear magnetic contact points for headphones.
2. Structural buckle fixation
Design grooves and buckles in the plastic structural components of headphones or charging compartments, with magnets embedded and locked by the structure. The advantage is that no additional materials are required, and the earphone's own structure is used to achieve magnetic fixation, reducing costs. When the magnet is displaced, it can be re fixed by adjusting the buckle position to improve maintenance efficiency.
Magnets in wireless Bluetooth earbuds
3. Screw fixation
The advantage of fixing with small screws and supports is that it is very stable, but this method is relatively rare.
The above outlines the three most common methods for securing magnets in TWS/OWS earbuds, with adhesive bonding being the predominant approach.
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