| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique contributing to improvement in damping effect of a dynamic vibration absorber while utilizing the top face disposition of an operating member in a working tool having the dynamic vibration absorber. SOLUTION: This working tool 101 includes: a working tool body part 103; a crank chamber 161a; a crank mechanism 114; a clutch chamber 151b; a clutch mechanism 124; an operating member 155; clutch switching members 166, 167; a switching operation transmit mechanism 169; and a dynamic vibration absorber 211. The crank chamber 151a and the clutch chamber 151b are partitioned from each other so that the clutch chamber 151b is isolated from a pressure fluctuation in the crank chamber 151a. The switching operation of the operating member 155 disposed on the top face of the working tool body part 103 is transmitted to the clutch switching members 166, 167 for switching the operating condition of the clutch mechanism 124 through the switching operation transmit mechanism 169 disposed on the outside of the crank chamber 151a. A weight 215 of the dynamic vibration absorber 211 is positively driven through the variation pressure generated in the crank chamber 151a. COPYRIGHT: (C)2007,JPO&INPIT
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