Atomizer, atomizing tube assembly for atomizer, and aerosol generating device

An atomizer, comprising:

• a housing, wherein a liquid storage cavity for storing a liquid substrate is formed inside the housing;
• and one end of the housing is provided with a suction nozzle having a suction nozzle opening for aerosol output;
• an atomizing assembly, configured to atomize the liquid substrate to generate an aerosol;
• an atomizing tube, formed by stretching a metal substrate, wherein the atomizing tube defines at least a part of an air outlet channel, and the air outlet channel is used for guiding the aerosol to the suction nozzle opening;
• and
• a closed-ring snap-fit member, wherein the snap-fit member surrounds the atomizing tube and is fixed on an outer surface of the atomizing tube adjacent to the suction nozzle, the snap-fit member comprises a clamping end extending in a radial direction of the atomizing tube, the suction nozzle is provided with a fitting member, and at least a part of the fitting member is configured to pass over the snap-fit member in an axial direction to form snap-fit connection with the clamping end.