| 摘要 |
<p>An impact driver (1) in which a drill mode can be selected without fail is provided. In a hammer case(5), a connecting sleeve(25) is provided so as to be slidable back and forth. At the backward position, the connecting sleeve(25) engages with only a first engaging tooth(27) provided on the outer circumference of the hammer(7) for rotating integrally. At the forward position, it engages with both the first engaging tooth(27) of the hammer(7) and a second engaging tooth(28) of an anvil(8) for rotating integrally with both of them, and thus a drill mode is obtained. Further, an operating bolt(33) is provided in the hammer case (5) to be inserted into a concave groove(30) of the connecting sleeve(25) through a guide groove(34) formed in the hammer case(5). The operating bolt(33) slides the connecting sleeve(25) to the forward or backward position by its movement in the guide groove(34).</p> |
