| 摘要 |
The present invention comprises: a shaft rotated by a driving force of a motor; a hammer moving gear and a drill moving gear having the same shape to be capable of changing in a hammer mode converting rotation of the shaft into linear reciprocating movement to strike a bit, a drill mode rotating the bit by rotation of the shaft, and a hammer and drill mode rotating and striking the bit; a drill side restoring spring installed between the drill moving gear and a drill driving unit interlocked with the drill moving gear; and a hammer side restoring spring installed between the hammer moving gear and a hammer driving unit interlocked with the hammer moving gear so as to enable the gears to be easily interlocked with the restoring force of the spring. |
