Atomizer and electronic cigarette having same

An atomizer, comprising:

• a mouthpiece assembly;
• a liquid supply assembly;
• a holder assembly;
• and
• an atomizing core;
• a first end of the liquid supply being connected to the mouthpiece assembly, and an opposite second end of the liquid supply being coupled with the holder assembly, the atomizing core being arranged between the liquid supply assembly and the holder assembly, the atomizing core defining a liquid inlet, the atomizing core being configured for aerosolizing tobacco liquid to form aerosol;
• the liquid supply assembly comprising a first liquid chamber, a second liquid chamber, an air pipe, a movable element, and an elastic element, the liquid inlet being in communication with the second liquid chamber, so that tobacco liquid in the second liquid chamber can enter the atomizing core for aerosolization, a through hole being provided between the first liquid chamber and the second liquid chamber, the movable element movably nesting the air pipe, the elastic element abutting against the movable element;
• wherein the movable element is movable along the air pipe between a first position and a second position, when the holder assembly is engaged with the liquid supply assembly, the elastic element is compressed, the movable element is in the first position, and the first liquid chamber is in communication with the second liquid chamber via the through hole;
• when the holder assembly is detached from the liquid supply assembly, the elastic element exerts an elastic restoring force on the movable element, drives the movable element to move to the second position, and the through hole is sealed, the first liquid chamber is cut off from the second liquid chamber.