Single-handle can opener

An adjustment mechanism of a can opener with a single handle, comprising:

• a transmission shaft having a traction wheel connected to an inward end thereof;
• the transmission shaft being passed through a handle of a can opener with the traction wheel being faced with both an inward side of the handle and a cutting wheel fitted on the handle, the transmission shaft terminating at a solid outward end;
• a spring joined to the shaft to bias the traction wheel away from the cuffing wheel towards the disengaging position;
• a hexagonal member arranged beside an outward side of the handle and fitted around the shaft;
• the hexagonal member having two opposite gaps and two sloping portions facing corresponding gaps;
• an adjustment element joined to the outward end of the shaft and in contact with the sloping portions of the hexagonal member;
• and
• a rotary lever fitted onto the hexagonal member at a middle hexagonal hole thereof, the transmission shaft being axially displaceable responsive to actuation of the rotary lever between engaging and disengaging positions relative to the handle;
• a threaded hole being formed on a middle portion of the adjustment element and threads on the outward end of the shaft, the adjustment element to be screwed onto the outward end of the transmission shaft for releasably tightened coupling thereto, and two wing portions being extended from two sides of the middle portion of the adjustment element to come into contact with the sloping portions of the hexagonal member so that the sloping portions can effect reduction of space between the traction wheel and the cutting wheel upon rotational operation of the lever in a cutting direction forcing the adjustment element to cause the traction wheel to turn together with it.