Atomizer and electronic atomization device

An atomizer, comprising:

• an airflow channel, comprising an air inlet and an air outlet;
• an atomizing core, at least a part of the atomizing core being located in the airflow channel;
• a base, wherein the air inlet extends through the base;
• and
• a one-way valve, comprising a baffle elastically connected to the base;
• wherein the baffle has a closed state and an open state;
• under normal conditions, the baffle is in the closed state, and the baffle covers the air inlet;
• upon inhaling at the air outlet, the baffle is in the open state to allow airflow to pass through;
• wherein the base has a base upper surface, and the baffle has a baffle lower surface;
• while the baffle is in the closed state, the base upper surface is opposite to the baffle lower surface;
• the base upper surface and/or the baffle lower surface reduce a contact area between the baffle and the base by partially protruding or partially recessing, the one-way valve further comprising a fixed end and an elastic arm, the elastic arm being connected between the fixed end and the baffle, the fixed end being fixedly connected to the base, and the baffle being capable of swinging relative to the fixed end following the elastic arm.