Abstract: A main body, an atomizing device, and an aerosol generating device. The main body includes a housing, a separator, an air inlet passage, and a first electrode. An opening is formed at an end of the housing. The separator is located in the housing and splits an internal space of the housing into a first cavity located on a side away from the opening and a second cavity located on a side of the opening. The air inlet passage is within the first cavity and the separator. The air inlet passage communicates with the outer air through the first cavity, and an air outlet end of the air inlet passage communicates with the second cavity, and protrudes from an end surface of the separator located at the second cavity. The first electrode is at the separator and protrudes from the end surface of the separator located at the second cavity.

Abstract: An e-liquid filling structure, including a drip tip with an e-liquid cartridge, an air duct provided in the drip tip, a base mounted to the drip tip, an atomizing core on the base, and a connecting seal hermetically connecting the atomizing core to the air duct. Embodiments of the present invention further disclose an assembly and e-liquid injection method of an e-liquid filling structure, including installing an atomizing core, pre-installing a connecting seal, injecting e-liquid, and installing a base. An e-liquid injection hole in the embodiments of the present invention not only allows injection of e-liquid but also functions to fasten the atomizing core while another e-liquid filling hole is spared, so that the atomizing core is reliably sealed.