Pressurization device for toner cartridge and toner cartridge

A pressurization device for a toner cartridge, comprising:

• an inner cover, which is arranged at a toner feeding port of the toner cartridge;
• an airbag, which is made of elastic material, wherein the airbag comprises a fixed end that is fixed to the inner cover and a free end;
• the fixed end is provided with an airbag opening interconnected to an interior of the toner cartridge;
• and a remaining portion of the airbag is arranged as closed except for the airbag opening;
• a sliding member with a first end connected to the free end of the airbag, wherein the first end of the sliding member is able to move toward the fixed end of the airbag back and forth, so that the airbag ejects gas into the toner cartridge by means of being compressed;
• and
• an outer cover, wherein:
• an elliptical annular groove facing the toner cartridge is formed on the outer cover;
• wherein:
• a slide portion is arranged at a side of the inner cover, closing to the elliptical annular groove;
• a sliding slot is provided on the slide portion;
• a middle part of the sliding member is able to slide in the sliding slot;
• a second end of the sliding member is slidably embedded in the elliptical annular groove;
• when the slide portion rotates with the toner cartridge relative to the outer cover, the sliding member slides back and forth in the sliding slot.