| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electric hand tool device having a hammering machine which connects an annular channel of a hammering area to a ventilation system for a motor to avoid deposition of the dust in the hammering mechanism and a transmission mechanism. SOLUTION: In this electric hand tool device having the annular channel 8 on an end face on the hammering area 6 side of a driver 3 of a tool 7 accommodated in a tool accommodation part 4, and at least one opening 9 outside the annular channel 8, the opening 9 outside the annular channel 8 is connected to the air suction ventilation system 5 of the electric motor. More preferably, the annular channel 8 is built in the ventilation system 5 of the electric motor so as to prevent the motor from being polluted with the air containing the dust.</p> |
