Heating mechanism, atomizer and electronic cigarette

An atomizer, comprising:

• a heating mechanism;
• a pair of electrode contact assemblies configured to connect to the heating mechanism and to a battery for providing electric drive for the heating mechanism;
• a main housing having an opening;
• and
• a sealing member configured to be assembled within the main housing via the opening,
• wherein the heating mechanism comprises:
• a heating member, wherein the heating member is a cylindrical heating strip and defines therein an airflow passage for airflow passing therethrough;
• a liquid guiding member for absorbing and/or storing tobacco liquid for the heating member to perform an atomizing action;
• and
• a base seat, wherein both the heating member and the liquid guiding member are assembled to the base seat,
• wherein the liquid guiding member is wrapped around a periphery of the heating member, or, the heating member is wrapped around a periphery of the liquid guiding member, the heating member and the liquid guiding member are disposed in the base seat in a transverse state and extends along an axial direction of the heating member, and
• wherein the base seat defines an airflow intake hole on one side end thereof, and an airflow outlet hole on an opposite side end, and the airflow enters the airflow passage via the airflow intake hole and travels out of the airflow passage via the airflow outlet hole, and
• wherein the main housing defines a liquid storage chamber and a smoke outlet passage, the sealing member defines a liquid intake hole and a smoke outlet hole, which are in communication with the liquid storage chamber and the smoke outlet passage, respectively, the heating mechanism is assembled in the sealing member, the base seat forms an atomizing chamber therein, and the atomizing chamber is in communication with the liquid storage chamber and the smoke outlet passage.