Abstract: A toolbox includes a housing and a holder base. The housing has a top retaining recess for the positioning of a power hand tool, and a receiving space. The holder base is detachably coupled to the housing for holding accessories to be used with the power hand tool positionable in the top retaining recess in the receiving space of the housing. A battery charger is mounted in the housing and has two conductive terminals located at the top retaining recess of the housing for charging the power hand tool that is positioned in the top retaining recess.

Abstract: A grinding wheel replacement safety structure for handheld grinding wheel device is located between a transmission grinding wheel fitting end and an actuating push button, and includes a safety button, a stop in, a limit actuating link, a link spring, and a stop in spring. The safety button is located above an umbrella-shaped gear of the fitting end and has a button face projecting from a grinding wheel housing. The stop pin extends vertically across a rear end of the button face proximate to a hub of the gear. The limit actuating link extends transversely across an offset surrounding wall of the safety button proximate to the actuating push button. The link spring is fitted over the limit actuating link and the stop pin spring is fitted over a neck portion of the stop pin to respectively abut against the inner wall of the housing.

Abstract: An improved carbon brush assembly for an electric tool, particularly an electric tool that utilizes electromagnetic force to drive a tool shaft. The carbon brush assembly includes a carbon brush, a carbon brush seat, a constant force spring and a cover. The carbon brush seat has the constant force spring fitted therein. The carbon brush always abuts against a plate portion of the constant force spring in the carbon brush seat. An electric tool housing is formed with a through hole corresponding to the carbon brush seat for passage of the carbon brush. A sunken space is formed around the through hole for embedding the carbon brush seat. The outer edge wall of the sunken space may just insertably grip the edge of the cover such that the cover forms a part of the housing after assembly to shield the carbon brush seat embedded in the housing. By virtue of the constant force spring, the carbon brush can be subjected to a more uniform biasing action to thereby prolong the service life of the carbon brush.

Abstract: A grinding wheel replacement safety structure for handheld grinding wheel device is located between a transmission grinding wheel fitting end and an actuating push button, and includes a safety button, a stop in, a limit actuating link, a link spring, and a stop in spring. The safety button is located above an umbrella-shaped gear of the fitting end and has a button face projecting from a grinding wheel housing. The stop pin extends vertically across a rear end of the button face proximate to a hub of the gear. The limit actuating link extends transversely across an offset surrounding wall of the safety button proximate to the actuating push button. The link spring is fitted over the limit actuating link and the stop pin spring is fitted over a neck portion of the stop pin to respectively abut against the inner wall of the housing.