Atomizer and electronic cigarette having same

An atomizer for an electronic cigarette comprising:

• an atomizing sleeve, the atomizing sleeve defining an air outlet at a top end thereof;
• a liquid chamber with tobacco liquid stored therein sealed in the atomizing sleeve;
• and
• an atomizing assembly arranged at a bottom end of the atomizing sleeve, the atomizing assembly comprising:
• a hollow fixing holder fixedly connected the bottom end of the atomizing sleeve;
• a transmission component, extending through the fixing holder, and being movable inside the fixing holder along an axial direction of the transmission component relative to the fixing holder;
• a seal cover fixedly connected with the transmission component and positioned outside the fixing holder, the seal cover being movable together with the transmission component between a first position where a liquid passage is formed between the seal cover and the fixing holder, and a second position where the liquid passage is closed;
• an elastic element sandwiched between the transmission component and the fixing holder, the elastic element being configured for storing energy when the liquid passage is formed in the first position of the seal cover, and configured for driving the transmission component to move from the first position to the second position of the seal cover using the stored energy and bringing the seal cover to move and close the liquid passage in the second position of the seal cover;
• an air pipe, a first end of the air pipe being fixedly connected with the seal cover, an opposite second end of the air pipe connectively extending to the air outlet;
• and
• a heating component residing between the seal cover and the fixing holder, and having a liquid conducting element and a heating element, the liquid conducting element being configured for absorbing tobacco liquid out of the liquid chamber flowing via and from the liquid passage, the heating element being configured for heating the absorbed tobacco liquid to vaporize.