Electronic cigarette

An electronic cigarette, comprising a power supply device (1), a screw sleeve (2) and an atomizer (3),

• wherein the power supply device (1) is provided with a cavity (11) accommodating the atomizer (3) with a cigarette holder (31) exposed outside the cavity (11);
• the atomizer (3) is provided with a screw joint portion (32) at one end thereof opposite to the cigarette holder (31), the screw sleeve (2) is in screw joint with the screw joint portion (32), and a middle part of the screw joint portion (32) is provided with a conduction head (33) insulated from the screw sleeve (2) that is made of an electrically conductive material;
• a bottom part of the cavity (11) is provided with an annular conductor (12), an adsorption element (13), and a pole needle (14) extending through a middle part of the annular conductor (12), and the adsorption element (13) is insulated from the pole needle (14);
• the screw sleeve (2) can be adsorbed on the adsorption element (13), so that the screw sleeve (2) is conductive with the annular conductor (12), and the conduction head (33) is conductive with the pole needle (14);
• the annular conductor (12) includes a first tube segment (121) and a second tube segment (122), wherein the first tube segment (121) has an internal diameter larger than that of the second tube segment (122), and the adsorption element (13) is arranged within the first tube segment (121);
• the first tube segment (121) is provided with a locating ring (15) in an inner ring of one end thereof opposite to the second tube segment (122) to secure the adsorption element (13), and the screw sleeve (2) is inserted into the locating ring (15), and electrically conductive with the locating ring (15) and the annular conductor (12);
• and
• the pole needle (14) is extended through a middle part of the adsorption element (13).