Tube cutter capable for cutting tubes with various diameters

A tube cutter, comprising:

• a main body having a cutting space, wherein one side of the main body has an opening in communication with the cutting space;
• a cutting blade member movably disposed on the main body, wherein at least a portion of the cutting blade member is located in the cutting space;
• a roller assembly movably disposed on the main body, the roller assembly including a roller base, a first roller, and a second roller, wherein the first roller and the second roller are respectively pivotally mounted on opposite sides of the roller base, and the first roller is positioned closer to the opening than the second roller;
• and
• a control assembly disposed on the main body and connected to the roller assembly, the control assembly being operable by a user to drive the roller assembly to move along a moving direction so as to change a distance between the roller assembly and the cutting blade member;
• wherein, when a tube is disposed in the cutting space, the cutting blade member, the first roller, and the second roller respectively abut against an outer wall surface of the tube;
• wherein a height of the first roller along the moving direction of the roller assembly is greater than a height of the second roller along the moving direction of the roller assembly, such that an included angle between a first clamping point at which the tube contacts the cutting blade member and a second clamping point at which the tube contacts the first roller is always smaller than 180 degrees.