| 摘要 |
<p>An air chamber (24) is formed in a cylinder (17) between a piston (20) and a striking member (21). The cylinder (17) is formed with at least one through-hole (25) for providing fluid communication between the air chamber (24) and an outside of the cylinder (17). A switching mechanism (6) switches operation modes between a first operation mode and a second operation mode. In the first operation mode, the at least one through-hole (25) is closed when the working tool (26) is moved toward the another end and, when the at least one through-hole (25) is closed, reciprocating motion of the piston (20) generates pressure changes in the air chamber (24), allowing the striking member (21) to transmit a striking force to a working tool (26). In the second operation mode, the at least one through-hole (25) is constantly open, prohibiting the striking member (21) from transmitting a striking force to the working tool (26).</p> |
