Dust collector for electric power tool, electric power tool, and dust collection system

A dust collecting system for an electric power tool, comprising:

• an electric power tool including a suction fan housed inside a housing to be rotated by a motor drive, a power-tool-side intake port formed on the housing and communicating with the suction fan, a shutter member provided in the housing and configured to open and close the power-tool-side intake port, in which the electric power tool includes an intake route extending from the power-tool-side intake port to the suction fan;
• and
• a dust collector for an electric power tool, the dust collector including a main body case that is mounted to the electric power tool and that includes a nozzle having a suction opening at a front end, a dust box internally including a filter, a contact member brought in contact with the shutter member, a dust-collector-side exhaust port disposed oppositely to the power-tool-side intake port, in which the dust collector includes a dust collecting route extending from the suction opening to the dust-collector-side exhaust port through the filter, wherein
• in a state where the main body case of the dust collector is installed on the housing of the electric power tool, the shutter member with which the contact member is brought contact releases the power-tool-side intake port such that the dust collecting route is communicated with the intake route,
• the main body case includes a through hole,
• the dust box includes the exhaust port disposed oppositely to the power-tool-side intake port via the through hole and a sealing member configured to seal between the power-tool-side intake port and the dust-collector-side exhaust port in a state where the main body case is installed on the housing, and
• the contact member is disposed in an area surrounded by the sealing member.