Oil leakage proof electronic cigarette with replaceable atomizing core

An oil leakage proof electronic cigarette with replaceable atomizing core, including a cigarette holder, a housing, a cartridge and a power supply unit provided in the housing, wherein

• the cigarette holder is detachably provided at one end of the housing;
• an end of the housing away from the cigarette holder is provided with an air inlet;
• the cartridge includes a casing of the cartridge, an atomizing assembly provided in the casing of the cartridge, and a first end cover and a second end cover provided at both ends of the casing of the cartridge;
• the second end cover is provided with a first electrode circuit board, both the first end cover and the second end cover are provided with air-guiding hole structures, the cartridge is detachably arranged in one end of the housing close to the cigarette holder, and the first end cover is in contact with the cigarette holder;
• the power supply unit is used to supply power to the atomizing assembly through a first electrode circuit board.