An electrical device, such as a nailer device, has a motor and a gear housing containing a transmission mechanism. The transmission mechanism is coupled to the motor for driving an impact member. The transmission mechanism includes a shaft having a through-hole wherein a first opening of the through-hole is communicated with the interior of the gear housing and a second opening of the through-hole is communicated with an exterior of the gear housing.
1. An electrical device comprising:
a motor;
a switch operable to control the motor;
an impact member; and
a transmission mechanism disposed in a gear housing coupled to the motor for driving the impact member, the transmission mechanism comprising a shaft having a through-hole wherein a first opening of the through-hole is communicated with the interior of the gear housing and a second opening of the through-hole is communicated with an exterior of the gear housing.
2. The electrical device as recited in claim 1 , wherein first opening is arranged on a surface of the shaft and the second opening is arranged on an end of the shaft.
3. The electrical device as recited in claim 2 , wherein the through-hole is generally L-shaped.