A protective cover assembled on an abrasive belt hand tool. The protective cover comprises an annular base and a tightening component. The annular base comprises a notch, a first clamping arm positioned on one side of the notch, and a second clamping arm positioned on the other side. The first clamping arm is formed with a through hole, the second clamping arm is formed with an assembly hole, the assembly hole does not penetrating through the second clamping arm. The annular base comprises a first state for tightening a protective cover mounting portion when the first clamping arm and the second clamping arm narrow the notch, and the annular base comprises a second state that the first clamping arm and the second clamping arm do not narrow the notch. The tightening component comprises a pull rod penetrating through the through hole and a piece arranged on the pull rod.

A grinding device includes a drivable backing pad and a flexible grinding element held on the backing pad by suctioning and is provided with abrasive grains. The grinding device is designed such that the grinding element, in the form of a grinding belt, protrudes circumferentially with respect to the backing pad, the abrasive grains covering the entire area of the grinding element.

OBJECT

It is an object to belt sander in which an operation of a lock-on mechanism is facilitated and an unintentional movement during the operation of the lock-on mechanism is avoided.

SOLUTION

A belt sander 1 includes a grip 16, a brushless motor 3, a switch lever 90 and a lock-on unit 100, and a lock-off unit 110. The grip 16 is configured to be gripped by the operator. The brushless motor 3 drives a sanding belt B. The switch lever 90 and the lock-on unit 100 are configured to perform an on-operation of the brushless motor 3, and configured to keep the on-operation. The lock-off unit 110 is configured to perform an on-operation of the brushless motor 3. The brushless motor 3 is rotated by the on-operations of both the switch lever 90 and the lock-off unit 110. The lock-off unit 110 is disposed at a position where an operation is allowed by a hand that grips the grip 16.

OBJECT

It is an object to belt sander in which an operation of a lock-on mechanism is facilitated and an unintentional movement during the operation of the lock-on mechanism is avoided.

SOLUTION

A belt sander 1 includes a grip 16, a brushless motor 3, a switch lever 90 and a lock-on unit 100, and a lock-off unit 110. The grip 16 is configured to be gripped by the operator. The brushless motor 3 drives a sanding belt B. The switch lever 90 and the lock-on unit 100 are configured to perform an on-operation of the brushless motor 3, and configured to keep the on-operation. The lock-off unit 110 is configured to perform an on-operation of the brushless motor 3. The brushless motor 3 is rotated by the on-operations of both the switch lever 90 and the lock-off unit 110. The lock-off unit 110 is disposed at a position where an operation is allowed by a hand that grips the grip 16.

A power tool includes a generally elongate tool housing defining a longitudinal axis parallel with the length of the tool housing, a work tip located at a first end of the tool housing for supporting a work member, and a power source interface located at a second end of the tool housing for supporting a removable power source. The tool housing includes an elongate handle-shaped grip region between the work tip and power source interface, and generally parallel to the longitudinal axis, and a drive region that substantially encloses a motor separately from the handle-shaped grip region. The motor is located between the handle-shaped grip region and the work tip.

A power tool includes a generally elongate tool housing defining a longitudinal axis parallel with the length of the tool housing, a work tip located at a first end of the tool housing for supporting a work member, and a power source interface located at a second end of the tool housing for supporting a removable power source. The tool housing includes an elongate handle-shaped grip region between the work tip and power source interface, and generally parallel to the longitudinal axis, and a drive region that substantially encloses a motor separately from the handle-shaped grip region. The motor is located between the handle-shaped grip region and the work tip.

An abrasive belt device includes first and second rollers that accommodate an abrasive belt to define a sanding surface, and a lever usable to modify a distance between the rollers. The abrasive belt device also defines an opening through which the belt passes during installation or removal. In a first lever position, the rollers are separated by a first distance that allows the installation or the removal of the belt, and the opening is not covered by the lever, thereby permitting a portion of the belt to pass through the opening. In a second lever position, the rollers are separated by a second distance, greater than the first distance, that inhibits the installation or the removal of the belt, and the opening is covered by a portion of the lever, thereby inhibiting any portions of the belt from passing through the opening.

An abrasive belt device includes first and second rollers that accommodate an abrasive belt to define a sanding surface, and a lever usable to modify a distance between the rollers. The abrasive belt device also defines an opening through which the belt passes during installation or removal. In a first lever position, the rollers are separated by a first distance that allows the installation or the removal of the belt, and the opening is not covered by the lever, thereby permitting a portion of the belt to pass through the opening. In a second lever position, the rollers are separated by a second distance, greater than the first distance, that inhibits the installation or the removal of the belt, and the opening is covered by a portion of the lever, thereby inhibiting any portions of the belt from passing through the opening.

A power tool which contains a casing, a brushless motor (22) mounted inside the casing, a user actuated switch (38) mounted on the casing, and a circuit board (32) mounted inside the casing. The brushless motor (22) is adapted to drive one or more movable parts in the power tool. The circuit board (32) is mechanically connected to the brushless motor (22) and the switch (38) at the same time. As only a single, integrated circuit board (32) is configured in the power tool, the manufacturing cost is reduced and greater reliance and electrical safety can be achieved.

A power tool which contains a casing, a brushless motor (22) mounted inside the casing, a user actuated switch (38) mounted on the casing, and a circuit board (32) mounted inside the casing. The brushless motor (22) is adapted to drive one or more movable parts in the power tool. The circuit board (32) is mechanically connected to the brushless motor (22) and the switch (38) at the same time. As only a single, integrated circuit board (32) is configured in the power tool, the manufacturing cost is reduced and greater reliance and electrical safety can be achieved.