A blade replacement apparatus of an electric instrument is provided. The blade replacement apparatus includes a nut, a nut loosening/tightening member, a locking member, and an operating member. One of the nut loosening/tightening member and the operating member has a first matching portion, the locking member having a second matching portion. The operating member is movable between an operating position and a non-operating position. When the operating member is in the non-operating position, the first matching portion engages with the second matching portion, and the rotation of the nut loosening/tightening member is obstructed by the locking member. When the operating member is in the operating position, the first matching portion is disengaged from the second matching portion, and the rotation of the nut loosening/tightening member tightens or loosens the nut.

Disclosed is a blade replacement apparatus of an electric instrument, which is used to replace blades connected by a bolt, the bolt extending along a first axis, the blade replacement apparatus comprising a nut that fits the bolt to fix the blade, a nut loosening/tightening member, a locking member, and an operating member, one of the nut loosening/tightening member and the operating member having a first matching portion, the locking member having a second matching portion, wherein the operating member is movable between an operating position and a non-operating position, the operating member allowing a user to perform an operation by hand without using any instruments; when the operating member is in the non-operating position, the first matching portion engages with the second matching portion, and the rotation of the nut loosening/tightening member around the first axis is obstructed by the locking member; when the operating member is in the operating position, the first matching portion is disengaged from the second matching portion, and the rotation of the nut loosening/tightening member around the first axis tightens or loosens the nut.

Disclosed is a blade replacement apparatus of an electric instrument, which is used to replace blades connected by a bolt, the bolt extending along a first axis, the blade replacement apparatus comprising a nut that fits the bolt to fix the blade, a nut loosening/tightening member, a locking member, and an operating member, one of the nut loosening/tightening member and the operating member having a first matching portion, the locking member having a second matching portion, wherein the operating member is movable between an operating position and a non-operating position, the operating member allowing a user to perform an operation by hand without using any instruments; when the operating member is in the non-operating position, the first matching portion engages with the second matching portion, and the rotation of the nut loosening/tightening member around the first axis is obstructed by the locking member; when the operating member is in the operating position, the first matching portion is disengaged from the second matching portion, and the rotation of the nut loosening/tightening member around the first axis tightens or loosens the nut.

The present invention relates to an ergonomic plier tool. More specifically, the invention relates to a piston actuated ergonomic plier tool having a 360-degree rotative and exchangeable head. The tool includes a body, lever, head cylinder, piston and jaw assembly. The disclosed tool allows an operator to work in tight spaces with her hand in one plane, while cutting/manipulating an object in an infinite number of planes different from that of her hand.

The present invention relates to an ergonomic plier tool. More specifically, the invention relates to a piston actuated ergonomic plier tool having a 360-degree rotative and exchangeable head. The tool includes a body, lever, head cylinder, piston and jaw assembly. The disclosed tool allows an operator to work in tight spaces with her hand in one plane, while cutting/manipulating an object in an infinite number of planes different from that of her hand.

A nipper, components thereof, and associated methods. The nipper includes first and second jaws, and first and second levers connected to respective ones of the jaws. The jaws are pivotable about a pivot axis to move cutting edges of the jaws toward and away from each other. The jaws and levers have a keyed connection for conjoint pivoting of the respective jaws and levers about the pivot axis. A retainer is configured to retain the cutting edges in a closed arrangement. The nipper includes a poker for cleaning paint from an eyelet of a lure or fishing hook. The poker is movable between stowed and deployed positions with respect to a lever of the nipper.

The present invention relates to a shearing tool such as scissors, comprising first and second cutting members pivotally coupled with each other, and a linkage pivotally coupled to the first and second cutting members, whereby the linkage and one of the first and second cutting members form together a compound lever mechanism. A force applied by an operator onto the shearing tool increases as an output by the linkage, and the increasing force is conveyed to that cutting member so that the cutting power of the shearing tool increase to allow hard-to-cut materials to be cut manually and easily with less effort from the operator.

The present invention relates to a shearing tool such as scissors, comprising first and second cutting members pivotally coupled with each other, and a linkage pivotally coupled to the first and second cutting members, whereby the linkage and one of the first and second cutting members form together a compound lever mechanism. A force applied by an operator onto the shearing tool increases as an output by the linkage, and the increasing force is conveyed to that cutting member so that the cutting power of the shearing tool increase to allow hard-to-cut materials to be cut manually and easily with less effort from the operator.

A cutter comprising two members each having a handle portion and an operative portion. The two members are pivoted together at a pivot located between the handle portion and the operative portion of each of the said two members so that the members are movable relative to one another about the pivot. The cutter further comprises at least one releasable cutter blade on the operative portion of one of the said two members. The two members are pivoted together releasably about a pivot pin of the pivot. The or each cutter blade is formed with an aperture through which extends the pivot pin.

A cutter comprising two members each having a handle portion and an operative portion. The two members are pivoted together at a pivot located between the handle portion and the operative portion of each of the said two members so that the members are movable relative to one another about the pivot. The cutter further comprises at least one releasable cutter blade on the operative portion of one of the said two members. The two members are pivoted together releasably about a pivot pin of the pivot. The or each cutter blade is formed with an aperture through which extends the pivot pin.