Nailer device

Abstract

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.

What is claimed is: 
     
       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.