Patent ID: 8769826

Claim:
A cutting device comprising: a housing, said housing having a left cover, a right cover coupling to said left cover, a front aperture for extension of an active blade, a space for storage of spare blades in a rear portion thereof, and a lower cover being able to cover said space, an actuator seat contained in and reciprocally slidable along said housing, said actuator seat having an actuator return spring with one end fixed to said actuator seat and the other end fixed to an inner surface of said housing, more than one rib, and one bottom protrusion, said bottom protrusion having a front dent defined thereon, an actuator extending from the housing and fixed to said actuator seat, a blade seat slidably contained in said housing said blade seat having an upper fulcrum, a side protrusion, a side blocker, a blade installation plate having elasticity, a lower fulcrum, and a blade seat return spring having one end fixed to said blade seat and the other end fixed to the inner surface of said housing, said blade installation plate having a rear end fixed to said blade seat and a front end having a side finger and a blade installation pillar formed thereon, said side protrusion having a front slope and a back tip which is receivable in said front dent of said actuator seat, a blade change means having an inner protrusion formed on said inner surface of said housing facing said side finger of said blade installation plate, a top button having a central pivot, a rear end, and a front end leaving a distance to said housing, and, a blade locking means having a sliding bar contained in said housing, and a button extending from said housing.