Notice: part of this article is extracted from 52audio. In case of copyright conflict, it will be deleted immediately.

In September 2016, Apple released the first generation of airplads, which promoted the rapid transformation of the headset industry, and TWS entered the stage of rapid growth from the embryonic stage. From 2016 to 2019, the global TWS headset market scale (by sales) increased from US $1.61 billion to US $11.84 billion, with a compound annual growth rate of 94.4%. Starting from the demand that many traditional earphones such as telephone, video and audio can not effectively meet, TWS has pried 100 billion market.

A small TWS, with a box size of less than 60 cubic centimeters, is equipped with a high amplitude driving unit, high dynamic range amplifier, chip, skin recognition sensor, motion acceleration, voice acceleration, force sensor and other complex and precisely arranged components. The fixation and assembly of each structural component and component determine the performance and use experience of the whole product, How to ensure the stability and protective performance of components in such a complex process is a pain point for manufacturing enterprises.

With the help of the disassembly content of 52audio, we will take you to comprehensively analyze the structure of airpods and understand the mystery.

Minimalist design of airpods 3 \ MagSafe rounded square charging box \ metal hinge on the back of charging box \ interface at the bottom of charging box.

Because the structural design of airplads is extremely precise and complex, and the space structure is narrow, it accommodates too many sensors and main devices. In order to improve the space utilization and integrity, Apple has adopted more than 30 adhesive packaging application points, which is almost a design that can not be repeated.

Therefore, the disassembly of 52audio is irreversible and destructive.

MagSafe charging box disassembly

Pry open the headphone cabin. The cabin is divided into upper and lower parts, which are fixed with a large amount of glue through fitting buckles. Due to the high strength of glue, the black plastic middle frame is broken due to disassembly. The magnet group at the bottom of the cabin is fixed by glue and attracted by magnetic force, so that it is not easy to close automatically when opening the cover, and it is fixed firmly when closing the cover.

Take out the earphone cabin, and the metal shrapnel for charging the earphone is connected to the main board through the flat cable. The flat cable is hot-melt fixed through the plastic column, and the middle frame is fixed with glue. A large area of graphene heat dissipation sticker is also pasted on the inner side of the shell.

Around the opening of the function key is the wireless charging coil, which is fixed with high-strength glue. The inner side of the shell is fixed with two square magnets through glue for magnetic suction charging function.

The main circuit components in the charging box are connected through BTB connectors, which are reinforced with a large amount of glue. There are two kinds of glue, the surface is made of slightly hard material, and the interior is filled with soft silica gel.

The back of the protective plate of the lithium battery integrated package is fixed by glue, and the positive and negative nickel sheets are spot welded on the contact.

The main board and the wireless charging receiving coil are fixed on the magnetic isolation sticker. The circuit diagram on the other side of the main board of the charging box shows that the whole board components of the main board of the charging box are not covered with waterproof glue.

Disassembly of airpods 3 earphone

Pry the earphone cavity along the mold closing line, take out the front cavity speaker unit, apple customized high amplitude driving unit and skin recognition sensor unit for ear detection function. Illustration of microphone, tone hole, battery and Bluetooth antenna.

All components in the earphone head cavity are connected in series to an FPC cable and then connected to the main board. The earphone adopts a steel shell button battery. Unplug the connector between the battery and the cable and fix it with glue.

The inverted hole structure on the cavity wall is bonded by glue, and a microphone is fixed on the cavity wall by glue.

Pry off the tail plug at the bottom of the headset, and the charging contact is connected to the inside of the headset through a flat cable. A MEMS microphone is fixed with glue inside the tail plug for voice call pickup. The call microphone is connected to the motherboard through a flat cable. The apple H1 encapsulated in the earphone handle occupies most of the position on the right side of the motherboard, and a force sensor is pasted in the earphone handle.

Front view of disassembly of airpods 3 earphone

summary

The internal structure of airpods 3 is relatively more precise and modular. A large amount of glue is used to fix the whole earphone.

The components in the charging box are fixed on the bracket and are connected with the main board through BTB connector. For the earphone part, the internal components are connected in series on a flat cable, and multiple components are pasted with glue. The components in the earphone handle are fixed on the motherboard. The new Apple H1 packaging system has a more regular shape, and the force sensor is fixed on the side of the motherboard through glue assisted patches.