Cutting tool

A cutting tool comprising:

• a main body;
• a plunger provided for the main body to be reciprocally movable in an axial direction thereof, said plunger being provided with an opening and a cutout axially formed to a portion opposing to the opening;
• a drive means accommodated in the main body for driving the plunger;
• a cutting blade to be mounted to the plunger;
• a blade mounting mechanism for mounting the blade to the plunger;
• and
• a lever member attached to the main body to be rotatable and engaged with the blade cover to move the blade cover;
• said blade mounting mechanism comprising a support member inserted into said opening of the plunger and provided with an engaging groove formed along a direction of mounting the blade, a ring member disposed to outer peripheral surfaces of the support member and the plunger, said ring member being formed with a tapered portion at an inner peripheral surface thereof opposing to said cutout of the plunger, and an elastic member for urging the ring member in a direction that a diameter of the tapered portion of the ring member reduces, thereby fastening the blade by the tapered portion of the ring member and the engaging groove of the support member;
• the cutting tool further comprising a claw means formed to the blade cover adapted to contact or separate from the elastic member;
• wherein when the blade cover is moved through rotation of the lever member, the claw means abuts against a front end portion of the elastic member, which is then moved against an urging force provided by the elastic member.