Quick-disassembly device and assembling method thereof

A quick-disassembly device for a camera, comprising:

• a carrier provided with an accommodating cavity and a limiting cavity which are in communication with each other;
• a connector movably arranged relative to the carrier, wherein at least an entering state and a locking state are provided on a moving path of the connector, such that in the entering state, the connector is at least partially accommodated in the accommodating cavity, and in the locking state, the connector is at least partially accommodated in the limiting cavity and relatively fixed with the carrier;
• and
• a limiting assembly, comprising a first connecting block and a second connecting block, wherein the first connecting block is arranged in the connector, and the second connecting block is arranged on the carrier;
• and in the locking state, the connector is abutted against an inner wall of the limiting cavity under a magnetic force provided by the first connecting block and the second connecting block, and is fixed in the limiting cavity.