Hand-held vacuum cleaner

A hand-held vacuum cleaner comprising:

• a main body comprising a casing and a motor fan assembly arranged in the casing, the casing defining a plurality of air outlet vents;
• a dirt container rotatably connected to the main body and comprising a hollow barrel and a filter assembly arranged in the barrel, the barrel communicating with the casing;
• a nozzle having a first end fixed to the barrel and a second end opposite to the first end, an air inlet defined in the second end and communicating with the barrel to allow air to be sucked into the air inlet, flow through the filter assembly and flow out of the casing through the air outlet vents when the motor fan assembly is in operation;
• and
• a connection assembly comprising a first connection member, a second connection member and a plurality of rolling members, the first connection member fixed to the main body and comprising a first surface, the second connection member connected to one end of the barrel and rotatably connected to the first connection member, the second connection member comprising a second surface facing the first surface, a first of the first surface and the second surface defining a circular groove, and a second of the first surface and the second surface defining a plurality of receiving holes, the rolling members arranged between the first surface and the second surface, accommodated in the receiving holes, and accommodated in the circular groove, wherein relative rotation of the first connection member relative to the second connection member causes the rolling members to roll in the receiving holes and along the circular groove.