公开(公告)号：EP3195986A4

公开(公告)日：2018-05-09

申请号：EP15835951

申请日：2015-08-21

申请人： HITACHI KOKI KK

发明人： NISHIKAWA TOMOMASA ,  KOMAZAKI YOSHIICHI ,  HARADA TETSUHIRO ,  BABA NORIKAZU

IPC分类号： B25C7/00 ,  B25C1/06

CPC分类号： B25C1/06 ,  B25C7/00

摘要： In order to provide a driver for reducing reaction generated to a driver main body, the driver 1 includes a nose portion 3 provided in a housing 2 and extending in a longitudinal direction, the nose portion being configured to allow a fastener to pass therethrough, a plunger 7 configured to move in an impact direction parallel to the longitudinal direction to impact the fastener through the nose portion, a weight 8, and a coil spring 9 configured to be compressed by a motor 5 in the longitudinal direction. a release of the compression causing the plunger 7 to move in the impact direction, while causing the weight 8 to move in a counter-impact direction which is away from the plunger 7. The coil spring 9 is provided between the plunger 7 and the weight 8. The coil spring has one end portion urging the plunger 7, and another end portion urging the weight 8.