Atomizing device and electronic cigarette having same

An atomizing device of an electronic cigarette, comprising:

• an atomizing sleeve;
• an air pipe received in the atomizing sleeve, an annular space being formed between the air pipe and the atomizing sleeve for containing a tobacco oil;
• an oil obstructing ring located at an end of the air pipe, the oil obstructing ring having an oil hole;
• an atomizing assembly positioned under the oil obstructing ring, the atomizing assembly including a porous body and a heating coil wrapping around the porous body;
• a screw sleeve and an electrode respectively electrically connected to two ends of the heating coil;
• a flexible membrane having an inner wall attached to the electrode, and an outer wall in contact with an inner wall of the screw sleeve, the flexible membrane capable of deformable to form an air space between the outer wall of the flexible membrane and the inner wall of the screw sleeve;
• an insulated ring, the electrode being located in the screw sleeve with the insulated ring located between the electrode and the screw sleeve;
• and
• an adjustable ring positioned between the insulated ring and the electrode.