Corner trimmer

A corner trimmer comprising:

• a base having a platform and a pivotal portion, the pivotal portion having two oval holes located on two sides of the base;
• a pivot extending through the base, two ends of the pivot extending through the two oval holes;
• a spring shaft extending through the base, two ends of the spring shaft fixed to the base;
• a resilient member mounted to the spring shaft and two ends of the resilient member contacting an inside of the base and the pivot respectively;
• a bottom blade fixed to the base and being parallel to the platform, the bottom blade having a round edge;
• an L-shaped operation member having two ends which are fixed to the two ends of the pivot of the pivotal portion of the base, the L-shaped operation member having an opening defined in an outside thereof, two stop edges located on two respective insides of the opening of the L-shaped operation member, the two stop edges extending toward the inside of the L-shaped operation member;
• a top blade located at an inside of the L-shaped operation member and having a curved edge which is located corresponding to the round edge of the bottom blade, two respective shapes of the round edge and the curved edge being complementary to each other, and
• a spring biased between the inside of the base and an underside of the top blade so as to keep the top blade and the bottom blade to be alternative to each other, wherein a corner of an object to be cut is fed via the platform of the base and trimmed into a protruded and rounded corner, or from the opening of the L-shaped operation member and trimmed into a recessed and rounded corner.