| 摘要 |
In a contact mechanism operable to cause an operation of a trigger to be effective by relatively moving upward with respect to a nose portion 4, a lower contact member 11 is held between two springs 23, 24 provided respectively at upper and lower positions near the nose portion 4, and a lower end of the lower contact member 11 is biased by the upper spring 23 so as to protrude downward from a lower end of the nose portion. Further, there is provided a switching device 28 which can switch between a first position in which the lower contact member 11 is held at an upper position against the upper spring 23, a second position in which the contact member is held at a lower position against the lower spring 24, and a third position in which a movement of the contact member is not restricted.
|
